a couple of random thoughts and pictures

I heard a quote last week from Lynn Margulis, of Gaia Theory fame: "Life is matter that chooses." My immediate reaction was that I liked it ... but then I started having doubts. It's appealing, but what does "choose" mean? If a single-celled organism moves toward light or engulfs a food particle or away from a predator, is that a choice? In what sense is it a choice? How is it different from a shadow's movement across the ground in response to the movement of the sun earth around the sun? For...