Accurate Greek Astronomy

Even in ancient times, the Greeks were remarkably exact in both astronomy and engineering.

Video Clips

Accurate Greek Astronomy

Ancient Greek Smarty-Pants

Climbing Through the Cave

Forming a Cave

Infra-red Lion Camera

Being Kidnapped

Hostage Situation

Negotiating with Terrorists

Captive Life

Battle of the Sexes

Medieval War Machines

The Unbreakable Code

Encoded Medieval Medicine

Escaping the Rock

Swimming from Alcatraz

Testing a Solar Plane

Solar Flight Takeoff

How Marijuana Works

This is Your Brain on Drugs

A Truckload of Contraband

Hotel Safehouse

The Case of the Missing Diamond

From Rock to Gorgeous Gem

Did Lincoln Have Cancer?

The Hunt for Lincoln's DNA

The Nat Geo TV App

Watch your favorite National Geographic Channel shows the day after they air.

Download on the App Store

Get it on Google Play