What is that drawing? A snowflake? No, it's actually a diagram showing how time travel is possible. You can read about it here. But could it really be possible?
In a recent study, quantum physicists proved that parallel universes exist. This means that time travel ought to be possible. Isn't that amazing?
The basics of time travel theory go back to Einstein. In this short video segment, you can watch a young boy explain it very simply. A site by PBS can help you think like Einstein and reason through the theory of time travel yourself.
But perhaps you're more interested in figuring out the real science behind popular science fiction. Then you should check out this time travel site, where you can learn about time travel in movies. For example, how did Hermione's time turner work in "Harry Potter and the Prisoner of Azkaban?" And if you mess up the past, would you really see yourself disappearing, as Marty McFly did in "Back to the Future?"
After learning all this, you'll probably want to get started building your own time machine, right? Give it a try with the Science Channel's very cool time machine builder. You'll really enjoy it!
What do you think of time travel? Some people think that even if it's possible mathematically, it can't really be done. Do you agree?