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CosmosIn60CosmosIn60In-depth, fact-checked space journalism
NASA said Mars meteorite ALH84001 held fossils in 1996. Set beside Perseverance's 2025 Cheyava Falls find, it shows what any Mars life claim must now survive.
Thousands of dehydrated tardigrades crashed into the Moon aboard Beresheet in 2019. The impact physics says they died — and a tun with no liquid water to revive in was never alive anyway.