We might have just found an entirely new way of spotting aliens.
Scientists have proposed a new way of looking out for marks of aliens in the universe.
And it could help us see life forms we’d completely miss otherwise.To do the research the scientists looked at the history of life on Earth and the kinds of gases that were around when it was.
They found that the planet had a complex mix of different gases – not only oxygen – and that looking for that cocktail could be a far more reliable marker of life on a planet.
‘We need to look for fairly abundant methane and carbon dioxide on a world that has liquid water at its surface and find an absence of carbon monoxide’ said co-author David Catling – a UW professor of Earth and space sciences.
‘Our study shows that this combination would be a compelling sign of life.
What’s exciting is that our suggestion is doable and may lead to the historic discovery of an extraterrestrial biosphere in the not-too-distant future’.