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Are We From Mars? - Windows to the Universe

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An image of the interior of a Martian rock. Some scientists believe the worm-like shape is a fossil of a microbe from Mars.
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Courtesy of NASA

Are We From Mars?
News story originally written on January 19, 2000

Did we come from Mars? Scientists say that tons of rocks came to Earth from Mars many years ago. These rocks broke off of Mars when asteroids ran into it.

They say that tiny organisms called microbes were living inside the rocks! They may have landed here and started life.

We do know that there can't be life on Mars now because it's too hot and we haven't found any water. But a long time ago, it was cooler and there was water.

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF