Continent-size islands deep inside Earth's mantle could be more than a billion years old, a new study finds.

Deep within Earth’s mantle lie two enormous regions, often referred to as "islands," which are the size of continents.

Alinda has made its closest approach to our planet in decades, and it's about to peak in brightness in a rare ...

The larger moons of Pluto and Earth likely formed through a collisional process with Charon and our moon, respectively, ...

"The rate at which the planet is evaporating is utterly cataclysmic, and we are incredibly lucky to be witnessing the final hours of this dying planet." ...

Over 25 years ago, researchers discovered that some of these deep Earth reverberations pointed to the existence of two ...

A big asteroid, the size of the Empire State Building, called 2024 WY70 is on a collision course with Earth this weekend.

The asteroid is estimated to be between 656 and 1,443 feet across, and will pass at 16 times the distance to the moon.