Astronomers have long searched for life within a rather narrow ring around a star, the "habitable zone," where a planet ...

A 66 million-year-old mystery behind how our planet transformed from a tropical greenhouse to the ice-capped world of today has been unraveled by scientists. Their new study has revealed that Earth's ...

Researchers have discovered that chemical reactions in underwater hydrothermal vents could have produced the necessary ingredients for life on Earth.

In high enough doses, hydrogen cyanide can kill an adult human in minutes, but the chemical may be the reason why we’re here ...

Microorganisms live in biofilms - the equivalent of microbial "cities"- everywhere on Earth. These city-like structures protect and house microbial communities and play essential roles in enabling ...

Their trunklike fossils were discovered in 1843. Yet despite more than a century of speculation, scientists have struggled to ...

NASA’s newly launched IMAP mission is set to tell us more about the boundary between our Solar System and interstellar space ...

A closer look at the Helix Nebula reveals how dying stars shed material, shape space, and hint at the distant future of our own Sun.

Astronaut Sunita Williams said seeing Earth from space changes how one views life and human differences. Speaking in New ...

Nearly 14 years ago, NASA’s Curiosity rover landed on Mars for a mission to explore the red planet and discover if it had an ...

“The closer it is to the sun, the more a planet becomes dominated by the sun’s gravity,” Kane said. “Because Mars is farther ...

The rock is estimated to be 3 billion years old. That places it among the oldest exposed rocks anywhere on Earth. Geologists ...