When a Mars-sized meteorite slammed into Earth billions of years ago, the impact completely reset any and all chemical ...

The simulation of the Solar System that came the closest to the observation was the presence of a small planet, between the ...

A new study has proposed the existence of Planet Y, an alternative Planet Nine candidate that is smaller and closer to Earth ...

Millions of years before blue oceans and wandering continents, the Earth in its early days was a molten, tumultuous planet — ...

The deficit of this isotope is now thought to mean that some of the oldest rocks on Earth are actually remnants of our planet ...

Analysis by researchers at the University of Bern suggests that water and other volatile compounds arrived on Earth from outer space—specifically via a collision with a Mars-sized planet billions of ...

This is what’s known as the "Purple Earth Hypothesis", an idea first proposed by Professor Shiladitya DasSarma, molecular ...

A new study led by UNLV scientists sheds light on how planets, including Earth, formed in our galaxy—and why the life and ...

The weak spot, known as the South Atlantic Anomaly, was identified in the 19th century and expanded in recent years.