Astronomers had detected just a hint, a glimmer of two molecules swirling in the atmosphere of a distant planet called K2-18b — molecules that on Earth are produced only by living things.

It’s a problem affecting mountains across the planet. People have long been fascinated with mountains for their dramatic beauty. Some make their homes beneath them — around 1 billion live in m ...

Astronomers had detected just a hint, a glimmer of two molecules swirling in the atmosphere of a distant planet called K2-18b — molecules that on Earth are produced only by living things.

The ocean covers over 70% of the planet. It is our life source, supporting humanity’s sustenance and that of every other organism on earth. The ocean produces at least 50% of the planet’s ...