What is Time Dilation?

One of the strangest implications of Relativity is the concept of time dilation; how people moving at different speeds will experience different amounts of time. Dr. Brian Koberlein helps us figure it out.

How Far Can You Travel?

If you accelerate at 1G, you can create artificial gravity inside your spaceship. And there’s the added advantage that you can cross billions of light years within a human lifetime. How far can we travel?