Mars

The search for life as we don't know it

Illustration of a small spotlight lighting an empty area, a small alien is off to the side of the light.
Illustration: Aïda Amer/Axios

The most comprehensive search for signs of intelligent life elsewhere in the universe has come up short so far, despite generating more than 1 petabyte of data. But such efforts are just getting started.

The big picture: The project — known as Breakthrough Listen — observed more than 1,300 relatively nearby stars over the course of 3 years, listening for any signs of radio waves that would signal the presence of technologically advanced aliens.

NASA's Curiosity finds more methane on Mars

NASA's Curiosity rover in Mars in 2018
Photo: NASA/JPL-CALTECH/MSSS /HANDOUT/Getty Images

NASA’s Curiosity rover has detected a large burst of methane gas on Mars, possibly indicating microbes are at work on the red planet, reports the New York Times.

Why it matters: If this methane is actually being belched out by microbes on Mars, it would be a paradigm shifting discovery, showing that life exists elsewhere in the universe. But we have a long way to go before assuming the reading from Curiosity means proof of life on Mars.