He developed the theory of evolution that life on Earth developed through the process of natural selection.

VOA: special.2009.12.16

They are the reason for the many different kinds of life on Earth.

VOA: special.2009.12.01

The researchers say their findings support the idea that a huge explosion or explosions caused fire and pressure powerful enough to kill off life on the Earth.

VOA: special.2009.01.20

"His extraordinary life on this earth has come to an end," "The extraordinary good that he did lives on."

VOA: standard.2009.08.26