In order to travel from our solar system to other stars (and survive the trip) humans will have to travel at close to the speed of light. But when you move at this cosmic speed limit, you start experiencing weird effects, which can even alter how you experience time. In this video, a collaboration between animation studio Thought Café and Popular Science, we explore what happens when you travel at the speed of light, and how moving at this speed could make interstellar travel possible.