K2-18b

Artist's impression of the exoplanet K2-18b, which was searched for possible signatures of life

Have we found life outside Earth? Most astrobiologists are still not convinced

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A survey conducted following reports of K2-18b and the "Chiaba Falls" rock on Mars found that most astrobiologists remained cautious. However, the findings from Mars have provoked less strong opposition than the claim regarding the distant planet.
An artist's impression of the exoplanet K2-18b, a world larger than Earth orbiting a red dwarf and being studied in search of possible signs of life or technological signatures.

K2-18b Scanned for Alien Signals – But No Technological Signature Found

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SETI researchers used the VLA and MeerKAT telescope to search for narrow radio signals from the intriguing exoplanet. None survived the noise filters, but the method will be used in future searches
An artist's impression of the planet K2-18b orbiting a red dwarf star 124 light-years away. The planet is thought to have a thick gas envelope and no global ocean. Credit: ESA/Hubble, M. Kornmesser

Earth may not be so special – new study challenges previous assumptions about water on distant planets

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This artist's impression shows what the distant planet K2-18b, its host star, and another planet in this system might look like. A new analysis from the University of Chicago has cast doubt on a previous finding that concluded the data showed evidence of life on the planet. Credit: European Space Agency/Hubble Space Telescope, M. Kornmesser

Is this alien life – or just a ghost? Scientists reevaluate Webb telescope discovery

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Possible signs of life on a distant planet? Not so fast. New research suggests the signal may be ordinary molecules, not alien biology.
Planets of all kinds. Illustration: shutterstock

Detecting water vapor in the atmosphere of an Earth-like planet is a big step toward discovering life in space

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Artist's rendering of planet K2-18b. Illustration: ALEX BOERSMA, University of Montreal

Water has been discovered on a planet that is in the habitable zone of its star

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