Science

What Earth's extreme life teaches us about aliens

We've found life in some of the hottest, coldest, and most acidic places on Earth. What does that mean for finding ET?

Life on Earth can get pretty extreme.

Martina Birnbaum / EyeEm/EyeEm/Getty Images

Scientists have found organisms in some of the hottest, coldest, saltiest, most acidic or pressurized places in the world.