Study warns of ‘oxygen false positives’ in search for signs of life on other planets

It seems like oxygen may not be the most reliable indicator of life on other planets. A new study has revealed that there are scenarios that lead to oxygen in planets’ atmospheres, but without the presence of life. For example, a planet similar to Earth but with more water during its early formation could end up with deep oceans that put immense pressure on the crust, stopping geological activity that normally removes oxygen from the atmosphere.
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