A team of astronomers claims to have sniffed out a “biosignature” in the atmosphere of a distant planet called K2-18b. But not everyone agrees that it signals life. An illustration shows what ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Some scientists think alien ...

Scientists have given a stark warning to anyone hoping that Venus might once have been home to alien life: stop. For decades, astronomers have speculated that our closest neighbour might once have ...

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