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 ...

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 ...

We have discovered over 34,000 NEOs in our solar system, and CNEOS tracks at least 2,300 PHAs. "A potentially hazardous asteroid (PHA) is one that has an orbit intersecting the Earth's orbit ...

About 2,300 years ago, the ancient Greeks deduced that a lunar eclipse occurred when Earth passed between the sun and moon.