As Earth approaches warmer levels experienced earlier in its geologic history, it may be bad news for human survival.

For a long time, scientists thought the Earth's inner core was a solid ball of metal, sort of like a planet within a planet ...

Who owns the moon ... the solar system and the only planet humans have sent rovers to explore. One day on Mars takes a little over 24 hours and a year is 687 Earth days.

Trump claimed that it was America's 'manifest destiny' to 'plant the stars and stripes on the planet Mars ... make a territorial claim to a region on Earth, countries need to have an established ...

Every day, about 48.5 tonnes of space rock hurtle towards Earth. Every day, about 48.5 tonnes of space rock hurtle towards Earth. Meteorites that fall into the ocean are never recovered.