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Was 2025 the year we found signs of past life on Mars?

Tantalising signs of past microbial life showed up on Mars this year, but to truly know whether they contain the answer to the biggest question in the universe, we will need to bring samples back to Earth

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The essential guide to proving we’ve found alien life

Space

The essential guide to proving we’ve found alien life

Features

Space

Hopes of finding aliens were raised in 2025 – but quickly faded

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SNR 0519, the remnant of a supernova that exploded about 600 years ago

Space

Earth and solar system may have been shaped by nearby exploding star

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Space

Caves carved by water on Mars may hold signs of past life

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Space

We may never figure out where interstellar comet 3I/ATLAS came from

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Space

Sorry, but interstellar visitor 3I/ATLAS really is a comet, not aliens

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Space

Water might be even more important for alien life than we thought

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Space

Stellar flares may hamper search for life in promising star system

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Trees against starry sky

Space

Why are the physical constants of the universe so perfect for life?

Conditions in our little pocket of the universe seem to be just right for life - and the much-debated anthropic principle forces us to wonder why

Features

Space

Astronomers double down on claim of strongest evidence for alien life

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Space

Alien megastructures would likely self-destruct before we spot them

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Space

Signs of alien life on exoplanet K2-18b may just be statistical noise

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Space

Claims of alien life are overhyped – and miss the real accomplishment

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