K2-18b, an exoplanet 120 light-years away, may be the best hope to confirm that life exists beyond Earth. Here's what to know ...

“Evidence of fresh water this deep inside Earth challenges the existing theory that Earth was completely covered by ocean four billion years ago.” According to the scientists, the emergence of ...

Observations have allowed scientists to conclude that the exoplanet, which is 8.6 times bigger than Earth, could be a Hycean world covered by ocean water underneath a hydrogen-rich atmosphere.

New JWST data strengthens earlier hints that K2-18b, a possible water world 120 light-years away, could host the chemical ...

The changes in ocean chemistry were gradual. The Archaean period lasted 1.5 billion years. This is more than half of Earth’s ...

It is generally accepted that in the distant past, the Earth was essentially covered in ice. This was when a global Ice Age occurred where the temperatures dropped dramatically (over the course of ...

More than 70% of the Earth is covered with water—H2O. An almost negligible proportion of a few per million consists of "heavy water," in which the hydrogen atoms (H) are replaced by deuterium ...

British researchers have found the "strongest evidence yet" of alien life beyond Earth with the discovery of an ocean-covered planet far beyond our solar system. While studying exoplanet K2-18b, which ...

K2-18b, an exoplanet 120 light-years away, may be the best hope to confirm that life exists beyond Earth. Here's what to know ...