One test of a true clock is its ability to keep time through a wide range of temperatures. A clock that speeds up in hot weather and slows down in co… - Jonathan Weiner

Watson sighs. “So in that sense you don’t have a free will. Your reactions are programmed. You know, you start asking the difference,” he says with a nod toward the Fly Room next door. “What free will is there in Drosophila? You put the question of the free will of a fly. And what’s really different about the fly’s brain from ours—which gives us free will?
“I’m sure once we know how the brain works, we’ll no longer talk about free will in the Jesuit sense. It will cease to be, you know—” Freedom will cease to be a mystery requiring Jesuitical debate; it will cease to be a theological or philosophical question. “It will just be how the brain works. You will describe how the brain works. You won’t use the words ‘free will’; you know, you’ll understand…. Because you’re asking, how does the brain work?” He says in a softer voice. “That’s what you’re really asking.” The bell in the double-helical bell tower outside his office window begins to toll. “And that’s really the ultimate question to ask,” he says.

“Molecular biology has no history for the young scientist,” one of the old guard declared not long ago.

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.