Wednesday 28 July 2010

EARTH: THE BLUE PLANET: BACTERIA

Exquisitely beautiful, yet small, silent and deadly, bacteria were some of the first true life forms. Our Earth formed 4,500 million years ago but bacteria didn't arise until 1,000 million years ago, well after the Big Bang.

Since that time, a great variety of life has evolved. Most of the plant and animal life that has arisen has subsequently gone extinct and our only ties to them are through the fossil record.