THE BIG PICTURE. “Our cosmos is 13.8 billion years old. Our planet was formed 4.5 billion years ago and life began 3.7 billion years ago. Our species, Homo Sapiens, is just over 300,000 years old. Copernicus, Kepler, Galileo and Newton appeared among us only in the last 500 years.” Never forget this. By the unique James Lovelock.