If we want to find evidence for alien life we don't need to keep looking for chemicals in exoplanet atmospheres or distant radio signals, says a Japanese astronomer.Instead, we should be studying the thousands of micrometer-sized bits of interstellar dust that hit Earth every year.University of Tokyo Professor Tomonori Totani proposed the new approach in a paper in which he suggests bits of space dust could contain the remains of single-celled organisms or other chemical evidence of life.
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