Watch scientists unearth a rare fossil...using liquid nitrogen. | NOVA l PBS

The Big Bang wasn't an explosion. Here's what it actually was: | NOVA l PBS

This is how a star dies in a colossal explosion called a supernova. | NOVA l PBS

Here's how our planet killed nearly all life on its surface: | NOVA l PBS

Watch a NASA spacecraft collide with an asteroid: | NOVA l PBS

Your brain alters a memory every time you recall it. Here's how: | NOVA l PBS