Why are there so many kinds of animals? Adaptive radiations like Darwin’s finches are the essence of the answer. - Jonathan Weiner

Taken together, these new studies suggest that Darwin did not know the strength of his own theory. He vastly underestimated the power of natural selection. Its action is neither rare nor slow. It leads to evolution daily and hourly, all around us, and we can watch.

“Ethicists are a mixed lot,” he says, “generally not worrying about their own problems, just somebody else’s problems.”

We do not lift a finger without three kinds of information: the information we are getting from our senses at that moment; the information we have gotten from our senses in the past; and the information our ancestors have acquired since life began on Earth—that is, the information that is represented by genes themselves. Evolution is learning. Species store learning in chromosomes the way individuals store learning in their brains and societies store learning in books.