A scientist dives beneath the surface of the frigid Antarctic ice sheet—and finds a landscape full of colors, light, and life.

Minerals are essential in making everything from skyscrapers tall, to mobile phones small.

Your perception of time depends on how you are moving.

A mysterious concept changed the way we understand reality.

Einstein's theory showed that time itself is affected by gravity.

Dive down to rare stromatolites—key clues to the evolution of virtually all complex life.

What does this geological wonder reveal about North America’s deep history?

Sea levels will rise by the same amount all over the world, right? Wrong. Here’s why.

Cyber threats from nation states and lone hackers are a persistent threat to America’s critical infrastructure.

We asked scientists, “What are your favorite images from space?” Here’s what they said.

The universe’s smallest particles fly down from space and emit from a radioactive rod.

How has this unique structure, built on a seismic fault, survived centuries of quakes? Airing February 25, 2015 at 9 pm on PBS

How did early engineers carve tombs into rock cliffs and funnel water to this desert city? Airing February 18, 2015 at 9 pm on PBS

1500 years ago, how did the Romans engineer bloody spectacles and reenact sea battles?

Explore the forces behind deadly landslides—and the danger zones for the next big one. Airing November 19, 2014 at 9 pm on PBS

Could parallel universes exist? If so, what would they look like and how would they form?

As the epidemic threatens to spiral out of control, scientists race to find a cure. Airing October 8, 2014 at 10 pm on PBS

The zombie apocalypse is here, and calculus explains why we can’t quite finish them off.

You're being chased by zombies, and understanding tangent vectors may save your life.

Almost a century ago, paleontologists found the first tantalizing hints of a monster even bigger than Tyrannosaurus rex, perhaps the largest predator ever to roam the Earth: spectacular fossil bones from a dinosaur dubbed Spinosaurus. But the fossils were completely destroyed during a World War II Allied bombing raid, leaving only drawings, questions, and a mystery: What was Spinosaurus?