life forms

Did Earth Life Come from Space? Tough Algae Suggests Panspermia Possibility

Desert Gypsy's picture 0 9/22/13, Megan Gannon

An asteroid is shown crashing into Earth

Scientists have long debated the possibility of that the microbial seeds of life did not originate on Earth, but were perhaps delivered here from an alien source, encased in comets or meteorites from Mars.

But to get here, simple life forms would have had to endure a litany of harsh cosmic conditions, including ejection into space, freezing temperatures, fiery re-entry and impact.

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