"During the early solar system's game of cosmic billiards, Earth was struck by a neighbor,” said Dauphas. “It was a lucky shot. Without the moon's steadying influence on our planet's tilt, the climate ...

Earth formed around 4.54 billion years ago. Knowing how old Earth is can be more difficult to confirm because Earth's age is not only based on the age of rocks, but also the isotopic estimates of what ...

Discover how scientists have used iron isotopes to determine the likely origin of the Mars-sized planet named Theia.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Deep below the Earth’s crust, along the mantle-core boundary, are dense geological blob-like anomalies ...

Earth is a dynamic and constantly changing planet. From the formation of mountains and oceans to the eruption of volcanoes, the surface of our planet is in a constant state of flux. At the heart of ...

It’s one of the most enduring ideas about the formation of our solar system: Earth collided with a Mars-sized object, Theia, and the debris from this cosmic crash eventually became the moon. But a new ...

Our moon has been our constant companion for billions of years. But we're still not sure how it came to be, though scientists have a few theories. The most outlandish theory, in which an alien planet ...

Abiotic chemistry in Earth’s atmosphere could have generated biologically important organosulfur molecules as life was ...

Water has made the Earth the planet that it is—a planet known for its blue oceans. Water shapes the land through erosion and is fundamental to Earth’s ability to support life. But we have a hard time ...

Earth and Mars were formed from material that largely originated in the inner Solar System; only a few percent of the building blocks of these two planets originated beyond Jupiter’s orbit. A group of ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. New model suggests an ocean of magma formed within the first few hundred million years of Earth's ...

Scientists have discovered a meteorite older than Earth, offering the earliest clues to how the Solar System formed and how ...