"Searching for Alien Life: The Potential of Space Dust and Meteorites"

Astrobiologist Tomonori Totani proposes studying space dust as a way to search for signs of life beyond Earth. Space dust could be carrying evidence of life from other planets that was blasted away by asteroid strikes. Totani suggests that grains of space dust approximately 1 micrometer in size could carry biosignatures and travel fast enough to reach distant planets like Earth. He estimates that around 100,000 such grains land on Earth every year and could be analyzed for traces of life that originated on other worlds.