Scientist says we may all be Martians

New evidence has purportedly emerged which supports the long-debated theory that life on Earth may have started on Mars.

How did Earth's primitive chemistry get kick-started?

How did life on Earth get started? Three new papers co-authored by Mike Russell, a research scientist at NASA's Jet Propulsion Laboratory, Pasadena, Calif., strengthen the case that Earth's first life began at alkaline hydrothermal vents at the bottom of oceans.