In this powerful talk, P.W. Singer shows how the widespread use of robots in war is changing the realities of combat. He shows us scenarios straight out of science fiction -- that now may not be so fictitious.

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. How can humans be so compassionate and altruistic -- and also so brutal and violent? To understand why we do what...

Civilians don't miss war. But soldiers often do. Journalist Sebastian Junger shares his experience embedded with American soldiers at Restrepo, an outpost in Afghanistan's Korengal Valley that saw heavy combat. Giving a look at the...

The Duomo, or Florence Cathedral, is one of the greatest architectural achievements of the Renaissance. Its massive red-brick dome, designed by Filippo Brunelleschi, changed the course of architecture forever. Built over centuries, the...

Howcast -Check out this walkthrough for the first person shooter, Battlefield 3, made by DICE, and find out how to beat "Uprising".

The War of 1812 was a conflict between the United States and Great Britain that lasted from 1812 to 1815. In this straightforward video, you'll learn what caused the war, including trade problems, impressment of American sailors, and...

Imagine being on a hot, rainy island far away during World War II. This video tells the story of the Battle of Guadalcanal, one of the most important battles in the Pacific. It started in 1942 and lasted for many months. American...

Every year on Memorial Day the country honors those who died while serving in the military. In this video, learn about how Memorial Day became a federal holiday.

Dr. Forrester tells the story of the legendary Davy Crockett.

Dr. Forrester tells the story of Molly Pitcher and talks about all the interesting facts she learns from reading American history books.

Mr. Beat tells the story of the Philippine-American War.