A new study offers an explanation for unusual chemical signatures found in some volcanic rocks.

Known as the giant-impact hypothesis, this proposed event involves a collision between Earth and a hypothetical Mars-sized protoplanet astronomers call Theia.

Most scientists think that Earth and Mars took shape this way from rocky pieces swirling around the young sun around 4.5 ...

A striking patch of bright rock in southern Madagascar has an unexpected connection to the Moon. Surrounded by rocks that ...

Earth and Mars may have formed through very different processes, despite developing as neighbors in the early solar system.

A sliver of iron thinner than a human hair was squeezed to deep-Earth pressures between the tips of diamond anvils, then ...

Earth and Mars emerged from the same young solar system around 4.5 billion years ago, yet they may have been assembled through fundamentally different processes. A new study published in Nature ...

Molten rock deep inside Earth can take up an extra supply of oxygen under pressure, according to a new study. That finding ...

Japan launched a $578 million mission Monday on a five-year expedition to land on the largest moon of Mars and retrieve ...

Scientists did not arrive at Earth’s age from one clue. Several very different measurements keep pointing toward the same ...

The materials that form the building blocks of life on Earth have been found in distant planet-forming discs that are the ...

Tiny samples from asteroid Bennu are rewriting scientists' understanding of how our Solar System formed. New evidence suggests that Bennu was born where material from the inner and outer Solar System ...