original undifferentiated cosmos had separated out into the different things we see. Thousands of years ahead of his time, Anaximander realized that fossil seashells on hilltops indicated that the world had been different, that it changes. He believed that life had originated in moist mud or slime and that land animals—including humans—evolved from fishlike animals. Modern science did not catch up with Anaximander until Lyell, Darwin, and Wallace in the 1800s.
