The head of planetary defense at the European Space Agency discusses 2024 YR4, an asteroid with a small chance of striking ...

Discover interesting facts about how big earthquakes can get, why earthquakes happen, and why they're so hard to predict.

But unlike its rocky siblings, almost 70 percent of Earth's surface is covered in oceans of liquid water that average 2.5 miles deep. These bodies of water contain 97 percent of Earth's volcanoes ...

So yes, there is a "dark side" to the moon — but it's always moving and sometimes faces Earth directly. Sources: NASA (1, 2) MYTH: The Earth is a perfect sphere. Earth is slightly flattened at ...

The Earth's interior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun. The deepest layer is a solid iron ball ...

He shared key facts about the asteroid with CBS News during the below conversation, which has been edited for clarity. When would the asteroid hit Earth ... at around 2%, it's still around ...