Thats the Earthbound opinion of astronomer Dr. Hugh Ross, who says that two percent of the material ejected from our planet from, say, a volcanic eruption or meteor crash ends up on the red planet.
He says those chunks of Earth contain lots of bacteria but doubts they could survive very long on Mars.
In fact, he thinks its possible that the space probes sent to Mars may have killed off whatever life exists there.
Although Ross concedes there is water on Mars, he says it would be difficult to sustain life there since the freezing and boiling point are the same so any H2O ends up frozen or in gas form almost instantly.
For that reason, Ross feels that sending an expedition to explore the possibility of life on Mars isnt the best use of NASA funds, especially because the Moon is closer and has even more chunks of Earth, including fossils of our planets first life forms.
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