evolution is how we came to be able to drink milk past breastfeeding...use all the resources available to you...
kind of.
drinking milk has survival benefits as well as selective forces, but evolution didn't CAUSE anything.
when people first started drinking milk of other animals, there were probably folks that were extremely lactose intolerant. some might have even died. and certainly, over time, people that died from drinking milk (if there were enough of them) would have been bred out due to the selective force of milk consumption.
the people that COULD drink animal milk would have survived, since it's a huge nutritional benefit. so, most people can drink animal milk without a problem.
finally, there were people like sarah who, while able to drink milk, have issues. Not deadly issues, but still issues. For these people, the selective force wasn't strong enough, and the survival benefits were. So, they're still around in the population.
explaining evolution is so much fun.
« Last Edit: April 29, 2009, 07:59:39 PM by eitje »

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Like yours. Only different.