Stephen Hawking's Big Ideas Made Simple-Animation

The minds that figure these things out are truly amazing!

E is for the Event Horizon and Beyond

No, I'm not talking about the film, but rather the event horizon of a black hole. A black hole is a singularity, and its gravitational field is so strong that not even light can escape.  The event horizon is the boundary.  At this point, escape velocity is equal to the speed of light, so once you reach that point, you're going along for the ride whether you like it or not.  Though no one can venture beyond this point and report back about what they see, scientific theory lets us speculate about what it would be like to fall into a black hole.

Warning!  Venturing beyond the event horizon of a black hole is for experienced virtual travelers.  Do not try this at home! :)