Scientists have identified approximately 2,300 potentially hazardous asteroids, including 153 that are over 1-km wide. The International Asteroid Warning Network has discovered more than 34,000 ...

Fragments from a bus-sized meteor that exploded in Earth's atmosphere rained down over ... A map showing every meteor strike since 2,300 B.C. is now making the rounds. The map was created by ...

It creates the Earth's magnetic field and is about 1,400 miles (2,300 kilometers) thick. The next layer is the mantle. Many people think of this as lava, but it's actually rock. The rock is so hot ...