Theory of Evolution

lol, if it does why are they still testing it? Why have millions of generations of fruit flies only produced, more fruit flies? Who cares if they change a little, that's like saying I evolved when I got my shots this year, sorry, that does not count as we share a common ancestor with modern day monkeys. How do you feel about homohabilis and homoerectus being found living together? How do you feel about a "70 million year old" dinosaur still having tissue and red bloods cells? How do you feel language began if we examine feral humans and see that if they don't learn to talk by a certain age, they never do? There is a metaphysical part to humans as well, and only considering the physical is not scientific. At least that's what Darwin's mentor Adam Sedgewick told Darwin.

None of what you say is in any way contradictory to evolutionary theory.

What you call "metaphysical" is simply the results of early environmental interactions with the individual.

Language cannot develop without the individual being in an environment where he/she is exposed to language.

Hearing language (or even seeing it like sign language) causes distinct changes in the developing brain.

The capacity for these changes is a result of evolution. The changes themselves are a result of environment.

The two are not capable of being considered in isolation.

edit: oh, and yes, your immune system did evolve when you got your vaccination.

However that is not a heritable phenotype, unless you are pregnant and passing on your immunity to your unborn child.
 
It's simple people. Separation of Church and Science... if a person is involved in both, they have to live with some inconsistencies.

Just like the separation of Church and State. Let's not mix the two. Unless Theocracy is your goal.
 
Evolution is a scientific theory, not a scientific law. There is a big distinction between the two. That said, creationism is not science but more correctly characterized as a philosophy. Personally, I do not believe in macro-evolution (too many gaps) but do believe in micro-evolution (which is observable). For the sake of disclosure, I do believe in creationism.
 
Here's an argument I keep running into (note! this is not my argument; this is not a troll! I want to hear alternate opinions on this):

a) Ron Paul doesn't "accept" the theory of evolution (although he sees evidence for it).

see: http://www.lewrockwell.com/blog/lewrw/archives/018118.html
http://www.mndaily.com/articles/2008/01/30/72165243

b) The attitude is not rational. Important decisions should be kept
out of the hands of the irrational when they have the potential to fuck over
hundreds of millions or even billions of other people.

c) therefore, Ron Paul is irrational and not fit to be President.

I'm having a hard time with this one... I have to admit I'm a little surprised that being a medical doctor w/scientific training Ron Paul objects in any way to the current theory of Evolution. A lot of people see this as a litmus test of rational thought and basic understanding of science.

Premise (b) is untrue. The attitude is completely rational. Not making a decision about something is more rational than making a conclusion about something you haven't been completely convinced of.

Just because Ron Paul has not yet seen sufficient evidence to convince him of the theory doesn't mean he's irrational. Just the opposite, actually. It shows that he's not a black-white thinker.
 
Here's an argument I keep running into (note! this is not my argument; this is not a troll! I want to hear alternate opinions on this):

a) Ron Paul doesn't "accept" the theory of evolution (although he sees evidence for it).

see: http://www.lewrockwell.com/blog/lewrw/archives/018118.html
http://www.mndaily.com/articles/2008/01/30/72165243

b) The attitude is not rational. Important decisions should be kept
out of the hands of the irrational when they have the potential to fuck over
hundreds of millions or even billions of other people.

c) therefore, Ron Paul is irrational and not fit to be President.

I'm having a hard time with this one... I have to admit I'm a little surprised that being a medical doctor w/scientific training Ron Paul objects in any way to the current theory of Evolution. A lot of people see this as a litmus test of rational thought and basic understanding of science.

He didn't say he didn't believe in evolution. He said he didn't think evolution adequately and single handedly explained everything. You are dealing with some pretty stupid people if they can't grasp that difference. Ask them if they have a degree from Duke Medical School. I bet most of them couldn't even get in.
 
He didn't say he didn't believe in evolution. He said he didn't think evolution adequately and single handedly explained everything. You are dealing with some pretty stupid people if they can't grasp that difference. Ask them if they have a degree from Duke Medical School. I bet most of them couldn't even get in.

This is true. Evolution doesn't explain everything, just how life changes over time. Specifically, evolution does not speak to the ultimate origin of life. Although science does not seek supernatural explanations about life or how life first came into existence from abiotic chemical precursors, it is true that this was an event that occurred in the distant past and so we will never know the details of how it happened.

The antiquated idea that there is something special about organic chemistry (chemicals and chemical reactions that occur in living systems) as opposed to inorganic chemistry is over 100 years out-of-date, yet many uneducated people still believe that something "magical" happens in living systems that can't occur outside of them. The only "magic" that keeps a cell alive is it's ability to maintain a stable internal environment in the face of a changing external environment, and this in no way violates any of the laws of physics or chemistry. It simply takes an external source of energy, which on Earth is ultimately either the Sun or geothermal energy from the Earth's interior.

I think the main problem most uneducated people (aside from religious objections) have with evolution is that they have absolutely no grasp of the time-scales involved. The earliest traces of life on Earth are from ~3.4 billion years ago, and undoubtedly it arose many millions of years before this. The Earth itself is ~4.6 billion years old, and the end of the Hadean era (formation of solid rocks and beginning of modern geological processes) was 500 million years after this.

So between ~3.9 billion years ago and 3.4 billion years ago, or for 500 million years, there were conditions on the Earth that were favorable for the accumulation of increasingly complex assemblages of pre-biotic molecules, huge planet covering reserves of them.

Half-a-billion years is a very long time. Eventually some of those pre-biotic chemical assemblages obtained enough complexity to start using less complex chemical precursors to produce copies of themselves. While we will never know the exact details of this it is likely that we will eventually recapitulate some similar set of circumstances in the lab.

Life, despite it's inherent mysteries, is a natural phenomena. Whether the Universe as a whole is is, to me, beyond the purview of science.
 
Evolution is a religion, just like all other religions.

Only if one believes in the supernatural.

That's sort of the dictionary definition of what separates religion from philosophy, a belief in supernatural phenomena that are incapable of being explained by reason.

Oh me of little faith :)
 
For those of you here, for whom "evolution" is absolutely a do or die KILLER issue, please just go and find, support and vote for a presidential candidate that agrees with your opinions.

Ron Paul is not going to change his views, just to please you.<IMHO>

Enough is much more than enough already.
 
Ron Paul's belief or lack thereof in evolution has no bearing on my support for him as our next President.
 
Evolution is a scientific theory, not a scientific law. There is a big distinction between the two. That said, creationism is not science but more correctly characterized as a philosophy. Personally, I do not believe in macro-evolution (too many gaps) but do believe in micro-evolution (which is observable). For the sake of disclosure, I do believe in creationism.

In respect for such a great man, can you please change your name?


Please read:

Evolution 101
 
As one who strongly believes in evolution and very little belief in the Adam and Eve story I feel I need to toss my opinion out into the arena of ideas.
I love science but I realize that there is a whole lot man doesn't know. What science has not proved to me is that all evolution is random. When a species evolves what really tweaks the DNA? Is it natural selection or a higher power tweaking his invention as he sees how to improve on it? The computer you are typing on now is the evolution of man's discovery of electricity centuries ago, after many, many small evolutionary intelligent steps.
I do believe in the survival of the fittest but let me warn the extreme adamant evolutionists on here you may not like the outcome of world totally run politically by this.
Man or God (who Knows) has tried to build a civilized set of rules of right and wrong (ten commandments, whatever) that we are to follow. The majority of these rules are based on the religions of the world.
If we throw all that out the window for evolutions base law the world may become a whole lot more used to invoking the survival of the fittest in political rule.
There will be no right and wrong except those that survive are right and those that are killed are wrong. If a nation wishes to take over a middle eastern region to get the oil and can survive doing so it is right. If a man rapes 500 women and impregnates them ensuring that more of his genes go forward he is right. If the husband of the first woman kills him or the woman herself kills him he was wrong.
If a nation determines to kill off all less advanced populations in order to ensure more resources for itself and it doesn't collapse of it's own weight doing so, it was right.
You are probably wondering why that sounds like the world now but imagine a world where "Thou shall not kill" in not even considered in humanities conflicts and only he who survives is calculated.
 
really good question for all to consider!

Just so I'm sure I understand this, Dr. Paul is on the hot seat for not swearing fealty to evolution, but every other candidate is some form a totalitarian and that DOESN'T reflect on their decision making ability (or their sanity)? Ron Paul has the effrontery to say there is a God, but the other candidates actually think that they ARE God, and it is Ron Paul who needs to be explained.

If someone can listen to Ron Paul's message (run your own life, make the government stop cheating us and everyone else) and compare it to Hillary's or Obama's or McCain's or Romney's and SERIOUSLY question who is for individual liberty then their "scientific objectivity" is seriously in question.

:D
 
Here's an argument I keep running into (note! this is not my argument; this is not a troll! I want to hear alternate opinions on this):

a) Ron Paul doesn't "accept" the theory of evolution (although he sees evidence for it).

see: http://www.lewrockwell.com/blog/lewrw/archives/018118.html
http://www.mndaily.com/articles/2008/01/30/72165243

b) The attitude is not rational. Important decisions should be kept
out of the hands of the irrational when they have the potential to fuck over
hundreds of millions or even billions of other people.

c) therefore, Ron Paul is irrational and not fit to be President.

I'm having a hard time with this one... I have to admit I'm a little surprised that being a medical doctor w/scientific training Ron Paul objects in any way to the current theory of Evolution. A lot of people see this as a litmus test of rational thought and basic understanding of science.

d) There are a LOT of scientists who reject the idea that we evolved from pond scum as unscientific.

e) The idea that we evolved from pond scum violates the scientific law against spontaneous generation which predates the theory of evolution.

f) The theory of evolving from a lower level to a higher one violates the second law of thermodynamics which states that things tend to go from a higher level to a lower. Oh I know. The evolutionists "comeback" is that input from "cosmic radiation" is what makes the difference. The problem with that is that excess cosmic radiation actually BREAKS DOWN DNA (hence skin cancer).

g) It's ironic that evolution is one of the FEW theories that some hold above criticism. (The unscientific "man made global warming theory" is another). For example noted physicist Stephen Hawking said of the theory of relativity and quantum mechanics that they can't BOTH be right. Obviously one or both must have holes in them. So why are some people so offended when intelligent people raise questions about evolution?

h) Dr. Ron Paul is first and foremost a Christian. I know that it's odd in today's world to see Christians actually standing up for their beliefs. But the idea that man evolved from pond scum is fundamentally opposed to Christianity. I'm not talking about post modernist, watered down "Jesus was a good man to draw life lessons from just like Buddha and Mohamed". I'm talking about "Jesus came to earth in order to break the curse of sin which had marred the image of God in man which God had placed when He created man". That's the fundamental belief of all mainstream Christian sects. But if man evolved from pond scum and if we are continually getting better through "natural selection" than Jesus mission to be born, live, die for man's sins and be resurrected was a complete waste of time. Now all of the other candidates CLAIM to be Christian. Considering that the majority of Americans are Christian (and a growing majority REJECT evolution) they know they can't get away with claiming they are "non believers". But why isn't anyone asking THEM "Hey, if you believe in Christ and you believe in evolution then why do you think Christ needed to die for man's sins? Or do you not believe that part of the Bible too?"

i) Ron Paul is not running for school board chairman. He's running for president. He wants to get RID of the federal department of education. So his personal views on the subject really are moot.

j) If someone is SO narrow minded that they will reject the only candidate who makes sense on foreign policy simply because he has the intellectual independence to question a scientific theory they hold dear, then to hell with them. They are too stupid to vote for Ron Paul anyway.

k) To the "rational" mind the whole idea of believing in a God you can't see is "irrational". Since all major candidates claim SOME kind of faith in God those who would reject Dr. Paul for not fully accepting evolution should stay home and not vote.

Regards,

John M. Drake
 
d) There are a LOT of scientists who reject the idea that we evolved from pond scum as unscientific.

e) The idea that we evolved from pond scum violates the scientific law against spontaneous generation which predates the theory of evolution.

f) The theory of evolving from a lower level to a higher one violates the second law of thermodynamics which states that things tend to go from a higher level to a lower. Oh I know. The evolutionists "comeback" is that input from "cosmic radiation" is what makes the difference. The problem with that is that excess cosmic radiation actually BREAKS DOWN DNA (hence skin cancer).

g) It's ironic that evolution is one of the FEW theories that some hold above criticism. (The unscientific "man made global warming theory" is another). For example noted physicist Stephen Hawking said of the theory of relativity and quantum mechanics that they can't BOTH be right. Obviously one or both must have holes in them. So why are some people so offended when intelligent people raise questions about evolution?

h) Dr. Ron Paul is first and foremost a Christian. I know that it's odd in today's world to see Christians actually standing up for their beliefs. But the idea that man evolved from pond scum is fundamentally opposed to Christianity. I'm not talking about post modernist, watered down "Jesus was a good man to draw life lessons from just like Buddha and Mohamed". I'm talking about "Jesus came to earth in order to break the curse of sin which had marred the image of God in man which God had placed when He created man". That's the fundamental belief of all mainstream Christian sects. But if man evolved from pond scum and if we are continually getting better through "natural selection" than Jesus mission to be born, live, die for man's sins and be resurrected was a complete waste of time. Now all of the other candidates CLAIM to be Christian. Considering that the majority of Americans are Christian (and a growing majority REJECT evolution) they know they can't get away with claiming they are "non believers". But why isn't anyone asking THEM "Hey, if you believe in Christ and you believe in evolution then why do you think Christ needed to die for man's sins? Or do you not believe that part of the Bible too?"

i) Ron Paul is not running for school board chairman. He's running for president. He wants to get RID of the federal department of education. So his personal views on the subject really are moot.

j) If someone is SO narrow minded that they will reject the only candidate who makes sense on foreign policy simply because he has the intellectual independence to question a scientific theory they hold dear, then to hell with them. They are too stupid to vote for Ron Paul anyway.

k) To the "rational" mind the whole idea of believing in a God you can't see is "irrational". Since all major candidates claim SOME kind of faith in God those who would reject Dr. Paul for not fully accepting evolution should stay home and not vote.

Regards,

John M. Drake

You unrelenting oblivious fool. Do you actually want me to refute this nonsense, because it's going to take several pages. We are only behind Turkey in the number of people who believe this crap... so no, it is not rare to have Christians flailing about and raging and ranting about their beliefs. Hell, yesterday I have another set of fliers from my friends at Cavalry Baptist down the street.... no there are definately plenty of Christians standing up for their beliefs... what a joke.

You couldn't name 5 people in the entire government at the federal and state level who are non-Christians. Seriously what a joke statement. Almost laughable.
 
You unrelenting oblivious fool. Do you actually want me to refute this nonsense, because it's going to take several pages. We are only behind Turkey in the number of people who believe this crap... so no, it is not rare to have Christians flailing about and raging and ranting about their beliefs. Hell, yesterday I have another set of fliers from my friends at Cavalry Baptist down the street.... no there are definately plenty of Christians standing up for their beliefs... what a joke.

You couldn't name 5 people in the entire government at the federal and state level who are non-Christians. Seriously what a joke statement. Almost laughable.

Right. The "scientific method" is to skip debate and go straight to ad hominems. That's ok. I'm used to fools like you. Some of them are neocons who support the war for no rational reason. Some are liberals who hate Ron Paul because they think he was destroy civilization as they know it. And some are evolutionazis such as yourself.

What's the funniest is that the facts you give actually support my arguments. I clearly said that most people who run for office claim to be Christian. You point that out as if it was some kind of revelation. But notice that the media isn't running Hillary Clinton, Barack Obama, John McCain or Mitt Romney to get them to either affirm or deny evolution and if they do affirm it to explain how they rationalize their belief in Christianity. Only Ron Paul.

Quick question. Do you hate Dr. Paul as much as you hate Christians in general? I suspect not since you are posting on a Ron Paul forum. Ultimately our purpose is to help him to become president. But some people like yourself feel it's more important to attack your fellow supporters and force them to adopt your world view. Why is that? This is a movement about freedom. If someone wants to believe that we were created by space aliens then that's their belief. Ron Paul is an avowed Christian which means he believes we were created by God. Deal with it. And God bless you.

Regards,

John M. Drake
 
Right. The "scientific method" is to skip debate and go straight to ad hominems. That's ok. I'm used to fools like you. Some of them are neocons who support the war for no rational reason. Some are liberals who hate Ron Paul because they think he was destroy civilization as they know it. And some are evolutionazis such as yourself.

What's the funniest is that the facts you give actually support my arguments. I clearly said that most people who run for office claim to be Christian. You point that out as if it was some kind of revelation. But notice that the media isn't running Hillary Clinton, Barack Obama, John McCain or Mitt Romney to get them to either affirm or deny evolution and if they do affirm it to explain how they rationalize their belief in Christianity. Only Ron Paul.

Quick question. Do you hate Dr. Paul as much as you hate Christians in general? I suspect not since you are posting on a Ron Paul forum. Ultimately our purpose is to help him to become president. But some people like yourself feel it's more important to attack your fellow supporters and force them to adopt your world view. Why is that? This is a movement about freedom. If someone wants to believe that we were created by space aliens then that's their belief. Ron Paul is an avowed Christian which means he believes we were created by God. Deal with it. And God bless you.

Regards,

John M. Drake



Alright, I went slightly out of my way to help you...This is from another forum, a very brilliant young woman wrote this:

"Much verifiable, valid, scientific evidence came to light at the conclusion of The Human Genome project. We now know that humans and chimpanzees are 96% identical at the DNA level, but that is not what is so fascinating.

For that, you need to look at the chromosomes. Humans have 23 pairs of chromosomes; the chimp has 24 (gorillas and orangutans also have 24 pairs like the chimp). The difference in the number appears to be the consequence of two ancestral chromosomes fusing together to form chromosome number 2 in humans.

To review, chromosomes are made up of two parts called arms. They are joined by something called a centromere, which is the pinched or narrow area between the arms. The short arm of the chromosome is called p (petite or small); the long arm is called q because q follows p. The p arm is always on top and the arms are what contain the genes.

At the end of the Human Genome Project they were able to pinpoint the exact location where the fusion occurred. Special sequences occur at the tips of all primate chromosomes and those sequences do not occur elsewhere. Now where we have chromosome number 2, primates have one extra chromosome (for clarity’s sake we will call them chromosome 2a and 2b). They have proof that 2a and 2b fused together to make chromosome 2 in humans because that special primate sequence (remember, it occurs at the tips of the primate chromosomes) is found along the long arm (q) of chromosome number 2 in humans (which is right in the middle of chromosome number 2, remember the short arm p, is on top, comes first, then it is joined by the q arm at the centromere).

So, this special sequence, which is only found on the tips of primate chromosomes, is found right in the middle of our fused second chromosome!!!!

Irrefutable proof that we both shared a common ancestor in the distant past.

The Human Genome Study showed inexorably that humans share a common ancestor with other living things.

Take for example, the human and mouse genomes, I’ll use these two genomes as an example due to the fact that they both have been determined now at a very high rate of accuracy. No way they could be similar right? Or if they are, it is only because God used successful design principles over and over again, right? WRONG.

The size of these two genomes is roughly similar and the inventory of protein coding genes is amazingly similar. The exact same order of genes along both the human and mouse chromosome is found/maintained over very substantial stretches of DNA. If you find say, human genes A, B, and C, in that order on the human genome, you will also find that the mouse has the counterparts of A, B, and C, placed in the same order although the spacing between the genes may have varied a bit. In some instances, the correlation extends over substantial distances; for example, all the genes on human chromosome 17 are also found on mouse chromosome 11.

Even more compelling evidence for a common ancestor has been achieved through the study of the ancient repetitive elements or ARE’s, which arise from “jumping genes” which are capable of copying and inserting themselves at random in various locations on the genome usually without any functional consequences. It is now possible to identify in the spaces between the genes the remnants of many jumping genes. Some of these elements have acquired many mutations compared to the original jumping gene and appear to be very old, hence the name, ARE’s.

Interestingly, these ancient elements are found in the exact same position (say between gene A and B) on both the human and mouse genome, even more interestingly was the finding of truncated ARE’s (truncated at a precise base pair at the time of insertion, losing part of its DNA sequence and all possibility of future function) in the EXACT same place on the mouse and human genome.

Finding a precisely truncated ARE in the exact same place on the mouse and human genome is evidence that the insertion event occurred in an ancestor that was common to both the mouse and human.

This is consistent with the ARE having arrived in a common mammalian ancestor and then carried along ever since.

Mammal genomes are littered with ARE’s and just about 45% of the human genome is made up of ARE’s. And remember the process of transposition often damages the jumping gene and there are ARE’s throughout the human and mouse genome that were truncated when they landed, removing all possibility of function and over and over again ( as stated above) you find a defunct ARE in parallel positions on the mouse and human genome.

God didn’t place defunct ARE’s in the exact same position to confuse or mislead us. The God that I believe in is neither a trickster nor a magician.

These truncated ARE’s are OVERWHELMING EVIDENCE for a COMMON ANCESTOR for humans and mice.

Random mutation of the gene for the jaw muscle protein MYH16 in humans led to a beneficial reduction in the mass of the human jaw muscle. This is beneficial because in humans the development of the weaker jaw led to the upward expansion of our skulls to accommodate our expanding brains. Multiple genetic changes then occurred leading to the development of the larger brain cortex.

The DNA code of the FOXP2 gene on chromosome 7 is stable in all mammals with the exception of the homosapien mammal, two significant changes occurred in the coding region of the FOXP2 gene 100,000 years ago, that led to the development of speech/language. It has been studied in multiple generational families that have severe difficulties in speaking, struggling to process words, understand complex sentence structure and the inability to move the muscles of their mouths, faces and larynx to articulate sounds, their DNA code in the FOXP2 gene is misspelled.


All organisms live in an oxygen rich environment, most of the time that is a good thing, but it causes serious problems at the cellular level, oxygen is highly reactive and with other compounds can produce H2O2 and an even more reactive compound called **** This damages DNA and proteins, and once the protein is so damaged by oxidation, the cell’s only solution is to junk the damaged macromolecule and make a new one.

So, what makes a protein susceptible to damage? Well the folks at Harvard took a bacterial protein and set up the conditions favorable to the evolution of a new protein resistant to such damage. Those smart cookies chose a protein enzyme that normally was produced only by fermentation in the absence of O2, I’d give you its name, but it is very long, so we will use the nickname that the scientists gave it, ProNADO, it is generally not around when O2 is present, so it is easily damaged by O2.

They grew these bacteria in the presence of O2 but supplied propanediol as a food source. Now, the only way for the bacterium to use propanediol as a food source is to convert it to other compounds, and to do that it must produce ProNADO, even though O2 is present. And guess what? Sure enough, in two separate experiments, mutants appeared in which the gene for ProNADO was switched on all the time, EVEN in the presence of O2, SCORE ONE FOR EVOLUTION, thank you very much.

Part Two:

Because ProNADO was not adapted to work in an O2 rich environment it was easily damaged by the **** radicals (and other oxidizing compounds). Now the researchers didn’t know enough on how to engineer the protein to make it resistant, so they sat back and thought,“We’ll let evolution teach us.”

So, they simply grew the mutant bacteria in plenty of O2, figuring that those chance random mechanisms of mutations (that the Creationists scorn) would come up with an oxygen-resistant form of ProNADO.

Sure enough, mutation and natural selection did the trick. It produced two mutants, each which were resistant to oxidative damage. In the first mutant, a single amino acid (the seventh in the chain) had been changed from an isoleucine to a leucine, and in the other a leucine in the eighth position was changed to a valine.

In fewer than 200 bacterial generations, the mechanism of random, undirected mutation had taken the gene for an oxygen sensitive protein produced only during fermentation and changed it into one that switched on all the time and was highly resistant to O2 damage.

E.C.C. Lin, et al.,“Evolution of an E. Coli Protein with Increased Resistance to Oxidative Stress”, Journal of Biological Chemistry 273,(1998): 8308-8316.

Benefits of lactose tolerance mutation and natural selection.

Got lactase?
April 2007

Quote:

In the US and many other countries, we've certainly "got milk," but not everyone can enjoy it. For around 10% of Americans, 10% of Africa's Tutsi tribe, 50% of Spanish and French people, and 99% of Chinese, a tall cold glass of milk means an upset stomach and other unpleasant digestive side effects. In fact, most adults in the world are lactose intolerant and cannot digest lactose, the primary sugar in milk. And yet, regardless of our ancestry, most of us began our lives happily drinking milk from a bottle or breast — so what happened in the intervening time? Why do so many babies enjoy lactose and so many adults avoid it? Lactose is broken down by a protein called lactase, which acts as a pair of molecular scissors, snipping the lactose molecule in two. Anyone who drank milk as a baby carries a working version of the gene that codes for lactase. In lactose tolerant individuals, that gene keeps working into adulthood, producing the protein that digests lactose and makes eating ice cream a pleasant experience. But in people who are lactose intolerant, that lactase gene is switched off after weaning. Now, new research reveals that the Stone Age ancestors of European dairy-lovers probably couldn't digest milk either. So how did they get from bellyaches to milk mustaches? The answer is an evolutionary story that takes us from the milkmaids of the Alps to the Maasai herdsmen of Africa.

Where's the evolution?

Mutations that keep the lactase gene permanently switched on are common among modern Europeans — but not among their ancestors. In March 2007, a team of German and British researchers announced that they went looking for that mutation in the 7000-year-old fossils of ancient Europeans and came up empty-handed. The researchers managed to extract the length of DNA corresponding to the lactose tolerance mutation from eight Neolithic human fossils and one Mesolithic fossil, but those DNA sequences did not carry the telltale mutation. The results suggest that as late as 5000 BC most ancient Europeans could not have digested milk as adults — and that they only later evolved into milk-drinking societies.
Today, the ability to digest milk as an adult seems like a clear benefit, but that wasn't always the case. Lactose tolerance is only advantageous in environments and cultures where humans have access to domesticated dairy animals. Multiple lines of evidence from human genetics, cattle genetics, and archaeological records suggest that Middle Eastern and North Africans populations domesticated cattle between 7500 and 9000 years ago, and that these animals were later brought into Europe. In that cow-friendly environment, being able to drink milk directly (instead of having to process it into lower-lactose cheese) would have been advantageous, providing additional sustenance and, during droughts, a source of water. The lactose tolerance mutation arose randomly (as all mutations do), but once it arose, it had a distinct advantage in these populations. Natural selection would have favored individuals carrying the lactose tolerance mutation, spreading it through ancient European populations that depended on dairying. Many thousands of years later, we see the indirect (but delicious) effects of this mutation's success in European cuisines: oozing French cheeses, Swiss milk chocolate, and creamy Italian gelatos."

Unquote

Work cited:

http://evolution.berkeley.edu/evolibrary/
 
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