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.
Now, a team of researchers found new evidence that a terrestrial algae just might be able to survive the physical strains of space travel, a discovery that may support the possibility that panspermia, the concept that microbial life is everywhere in the universe and can spread between planets, could potentially occur. [5 Bold Claims of Alien Life]
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