Planetary scientists have long debated where the material that formed Earth comes from. Despite its location in the inner ...

Everyone wants to know the answer to how life began on Earth, but few people are as singularly focused on the question as Ramanarayanan Krishnamurthy. “We’ve now discovered a plausible way that ...

Helium-3, a rare isotope of helium gas, is leaking out of Earth’s core, a new study reports. Because almost all helium-3 is from the Big Bang, the gas leak adds evidence that Earth formed inside a ...

Researchers have identified what may be the first physical traces of primordial Earth, the early version of our planet that existed before a massive collision reshaped it into the world we know today.

Violent collisions between the growing Earth and other objects in the solar system generated significant amounts of iron vapor, according to a new study by LLNL scientist Richard Kraus and colleagues.