A meteorite from Mars that caused a splash here on Earth decades ago contains no sign of ancient, primitive life on Mars, after all, say scientists. NASA announced in 1996 that organic compounds in rocks may have been deposited by living organisms.

Is there life on Mars?: Study of decades-old meteorite casts doubt on presence of life on the planet

A piece of Martian meteorite will go back to Mars with NASA's robot rover Perseverance. The ancient rock has been donated by the Natural History Museum in London and the rover carrying it will be propelled towards the red planet on a seven-month journey after its launch on Thursday.

Martian rock to be sent back to Mars in NASA's rover mission after 700,000 years

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Is there life on Mars?: Study of decades-old meteorite casts doubt on presence of life on the planet

Martian rock to be sent back to Mars in NASA's rover mission after 700,000 years