The origin of life on Earth is one of science’s biggest questions, and previous theories have suggested that lightning may have played a role. While previous studies say volcanic or atmospheric ...

Evidence is mounting that the same basic chemistry that made Earth habitable is unfolding, or once unfolded, on Mars. From ...

Scientist have concluded water did not arrive as early during Earth's formation as previously thought, an insight that bears directly on the question of when life originated on the planet. The finding ...

For decades, scientists have been baffled by two enormous, enigmatic structures buried deep inside Earth with features so vast and unusual that they defy conventional models of planetary evolution.

For over half a billion years, Earth’s magnetic field has risen and fallen in sync with oxygen levels in the atmosphere, and scientists are finally uncovering why. A NASA-led study reveals a striking ...

Ancient supercontinent Nuna's breakup around 1.5 billion years ago set off a chain of events that made Earth more habitable, new research suggests. When you purchase through links on our site, we may ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. In the 1931 movie ...

Impact craters found around the Earth that were made around the same time could be linked to debris falling from a ring, a new study suggests. By Becky Ferreira If you were to look up from Earth some ...