Reddit's trying out something new: it's launched its own, original mini-series of web videos. Bases on its Explain Like I'm Five subreddit, it explores political and social issues in a way anyone can understand.
Click to viewA compass that doesn't need a magnetic needle? That might sound impossible, but the ancient Chinese worked out how to make one 4500 years ago. Now you can make one too—from Lego bricks.
There's little action, no sound, and the footage is grainy. But this brief clip may be the only existing video of writer Mark Twain and his daughters Clara and Jean. It was captured in 1909 by inventor Thomas Edison.