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Two high-profile entrepreneurs say they want to put a DNA sequencing machine on the surface of Mars in a bid to prove the existence of extraterrestrial life.

In what could become a race for the first extraterrestrial genome, researcher J. Craig Venter said Tuesday that his Maryland academic institute and his company, Synthetic Genomics, would develop a machine capable of sequencing and beaming back DNA data from the planet.

Separately, Jonathan Rothberg, founder of Ion Torrent, a DNA sequencing company, is collaborating on an effort to equip his company's "Personal Genome Machine" for a similar task.

"We want to make sure an Ion Torrent goes to Mars," Rothberg told Technology Review.

Although neither team yet has a berth on Mars rocket, their plans reflect the belief that the simplest way to prove there is life on Mars is to send a DNA sequencing machine.

"There will be DNA life forms there," Venter predicted Tuesday in New York, where he was speaking at the Wired Health Conference.

Venter said researchers working with him have already begun tests at...