If we want to look for signs of life on other worlds, we might want to look to our planet’s past, specifically when dinosaurs roamed the Earth.
A recent study suggests that when searching the chasm of light years between Earth and other possibly habitable planets, biosignatures present during Earth’s Paleozoic and Mesozoic eras would be much easier to detect. This is in large part due to this era’s oxygen-rich atmosphere compared to modern Earth. Cornell University astronomers Lisa Kaltenegger and Rebecca Payne published their work in the Monthly Notices of the Royal Astronomical Society.
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