What the Heck is Dark Matter?

85% of the mass of our universe is made up of dark matter--a type of matter that we cannot see or detect, but without it, galaxies would not exist and the universe as we know it would be very different. What is dark matter? Where is dark matter? How can we find dark matter?

More Episodes

The Complicated History Of The Confederate Flag

There wasn't just one confederate flag, there were dozens.

The Lasting Impact of Women in The Civil War

When the Civil War began, women were able to take on a variety of new roles.

The Secret Life and Art of Henry Darger

Henry Darger is one of the most famous outsider artists in the world.

Other Shows You May Enjoy