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Discovery of Life Beyond Earth

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extraterrestrial intelligence

The Conversation

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Science

‘Extraordinary claims require extraordinary evidence’ − an astronomer explains how much evidence scientists need to claim discoveries like extraterrestrial life

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A paper published in April 2025 claimed to have detected a signature of life in the atmosphere of K2-18b .

John Sutter : A detection of life beyond Earth would be one of the most profound discoveries in the history of science.

But to reach this threshold, a result needs to fit several important criteria, Sutter says.

In 2017 , a rocky, cigar-shaped object called Oumuamua was the first known interstellar object to visit the solar system.

But no detection has cleared the threshold enunciated by Carl Sagan , says Chris Impey .

The same criteria apply to research about the entire universe, which is only one universe to study.

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English

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long-living

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