For the first half of geological time our ancestors were bacteria. Most creatures still are bacteria, and each one of our trillions of cells is a colony of bacteria.

Huxley who was known as "Darwin's Bulldog" for his advocacy of Charles Darwin's evolutionary ideas. The Extended Phenotype (1982) in which he describes natural selection as "the process whereby replicators out-propagate each other". Lewontin.

He is an emeritus fellow of New College Oxford and was the University of Oxford's Professor for Public Understanding of Science from 1995 until 2008. Instead he describes evolutionary processes as analogous to a blind watchmaker. He is well known for his criticism of creationism and intelligent design.