The people that domesticated cattle and started drinking milk learned how to digest it as adults. Normally, creatures after they grow up cannot digest milk easily. For instance, a kitten will nurse and digest milk, but then will grow up, stop drinking it, and start catching mice.
More Quotes from Carl Zimmer:
Evolution is a large political controversy as to what should be taught in the schools. But there is no scientific controversy that we evolved when we talk about evidence from fossils and DNA.Carl Zimmer
Our species evolved in Africa 200,000 years ago. We didn't move out until 100,000 years ago, and there were several waves. The oldest evidence of species outside of Africa was in Europe about 40,000 years ago, and in Australia 50,000 years ago.
Carl Zimmer
I started fact checking and copy-editing, basic stuff. Then I started writing books and articles, and left in 1999. I've been working freelance ever since and moved here three years ago.
Carl Zimmer
There is so much being discovered about human origins. Five years ago, the oldest fossils of hominids were four and a half million years old. There has been a series of discoveries that pushed fossils back to six or seven million years old, which adds a couple of years to evolution history.
Carl Zimmer
I read a lot of scientific papers on the history of evolution and spent time talking to scientists. I started to write it in the spring of 2004 and wanted the book to look at the biggest questions people have about human origins, such as what were the first hominids and how did our ancestors evolve to walk upright.
Carl Zimmer
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