NASA's Mars Rock and the Strongest Hint of Ancient Life Yet

NASA found a potential biosignature in a Mars rock called Cheyava Falls, announced 10 September 2025

The clue is a pattern of minerals nicknamed 'leopard spots' rich in iron, phosphate and sulfur

It is the strongest sign of possible past life NASA has reported, but not proof

Confirmation needs the sealed sample brought to Earth in the 2030s for lab study

The rock sat in a dried river valley that carried water more than 3 billion years ago

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