Assertion: comet's theory | /r/Synonym | panspermia
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text: It's thought that comets and other objects may pick up matter capable of generating life as they travel through habitable zones and seed it when they collide with planets -- a theory known as panspermia.
text: This theory, called panspermia, suggests that primitive life can travel from world to world on space rocks, kick-starting evolution in each new environment.
text: This lends credence to the idea that microbes might have hitched a ride on 'Oumuamua-type objects in the past and spread throughout space — a theory known as panspermia.