Originally posted by snowinscotland
Early man 'couldn't stomach milk'
A drink of milk was off the menu for Europeans until only a few thousand years ago, say researchers from London.
Analysis of Neolithic remains, in Proceedings of the National Academy of Sciences, suggests no European adults could digest the drink at that time.
University College London scientists say that t ...[text shortened]... benefits of milk shows evolution in action.
it might be because eating milk might involve some sort of domestication of animals. which didn't happen in the early stages of human society. so probably they tasted milk, saw that it was good but gave them indigestion, which didn't deterred them anyway as not even the evolved human abstains from bad food. so regularly eating the milk(cow or goat) triggered evolution.
in the future we would be able to digest radioactive sludge if we keep eating junk food.