Are earthlings really Martians?

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(CNN)– Are earthlings really Martians? A long-debated theory holds that life on earth actually started on Mars. Now… new research seems to suggest just that.

US scientist Steven Brenner says a mineral critical to the origin of life …oxidized molybdenum…didn’t exist on the surface of earth three billion years ago. But it did exist on the red planet.

It’s one more piece of evidence that a Martian meteorite may have actually started life on earth. The study results were released at the annual Goldschmidt Conference in Italy on Thursday.