Even at a very young age it was amazing to me that you could take a seed from a plant and somehow that grew into a plant. Even more striking as a natural fact is what we now call frog spawn. When you go to the ponds you find these black eggs. They are actually. And they turn into a tadpole. Now how do they know how to do that? The mother can’t teach them. The mother isn’t there anymore. She lays them and disappears. No one else comes along to tell them how to do it. Somehow they know how to do that. That has always been a fascinating problem to me, to think, “How can an egg know how to turn into a tadpole or a frog?”