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Scientists discover signs of 'alien' life beyond our solar system

2025-04-17 10:14:08Kosova&Bota SHKRUAR NGA REDAKSIA VOX
Scientists discover signs of 'alien' life beyond our solar system
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Scientists have found 'evidence', which they consider to be the strongest signs of the existence of life beyond our solar system.

The BBC reports that a group of scientists discovered chemical traces of gases in the atmosphere of an alien planet, which on Earth are only produced by living organisms.

Astronomers have discovered traces of two chemical compounds – dimethyl sulfide (DMS) and dimethyl disulfide (DMDS) – on the exoplanet K2-18 b, which, on Earth, are produced exclusively by life forms such as marine phytoplankton, foreign media write.

“This is the strongest evidence yet for possible biological activity beyond our solar system,” Professor Nikku Madhusudhan, an astrophysicist at the University of Cambridge, who led the research team, told the Guardian.

"We are very cautious. We have to question the validity of the signal and what it might mean," he added.

"The only scenario that currently explains all the data obtained so far by the JWST (James Webb Space Telescope), including past and present observations, is one where K2-18 b is a world teeming with life," the professor continued.

Meanwhile, there are many "ifs" and "buts" at this stage, Prof. Madhusudhan's team admits.

First, this latest discovery is not up to the standard required to claim a discovery.

To do this, researchers need to be about 99.99999% sure that their results are accurate. In scientific jargon, this is a five sigma result.

The latest results are only three sigma, 99.7%. Which sounds like a lot, but it's not enough to convince the scientific community.

But it's much more than the 68% one-sigma result the team got 18 months ago, which was met with a lot of skepticism at the time.

But even if the Cambridge team gets a five-sigma result, it won't be definitive proof that life exists on another planet, according to Prof Catherine Heymans from the University of Edinburgh.

"Even with that certainty, there is still the question of what the origin of this gas is," she told BBC News.


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