Mars was once a blue water world studded with active volcanoes. But when its magnetic field and protective atmosphere faded, it became the frozen desert planet we know today. With so many necessary elements in place, did life ever form on Mars?

Colossal explosions shake a remote corner of the Siberian tundra, leaving behind massive craters

Renowned paleontologist Kirk Johnson takes us on an epic adventure through time at the polar extremes of our planet.

Humans have been altering Earth’s environment for thousands of years…

How are leading innovators supercharging our natural abilities?

How are leading innovators supercharging our natural abilities?

Take a wild ride through the quantum world…

From meteorites that impact Earth, to a moon that orbits backwards…

Out in the solar system, ice can get bizarre. Visit strange, frozen worlds – from Uranus’s ultra-hot superionic ice, to glaciers of nitrogen ice on Pluto…

Around our solar system, violent eruptions are shaping distant worlds…