NASA has reached a major milestone in finding out whether life exists beyond Earth once and for all.

The space agency's Perseverance rover has arrived at the doorstep of a key spot, described as a "geologic feast" for it to dig.

After more than a year on the Red Planet, the dinky bot has reached a mysterious ancient river delta.

It's here that experts think we may finally uncover signs of past microscopic life.

"The answers are out there," Nasa associate administrator Thomas Zurbuchen said.

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