Chinese scientists recently discovered an unusual crystal on the Moon. They found out that this crystal contains an element that can literally replace nuclear fuel. These crystals were formed as a result of volcanic activity, just like some garnets on the Earth. And yep, the place where they discovered these crystals also suffered from volcanoes... 1.2 billion years ago. Are they dangerous for us down on Earth, or could we make good use of them?

The leaning tower of Pisa is one of the most famous Instagram-able spots in the world. There are pictures of people leaning on it or pretending to support it so that it doesn't fall. But did you know there’re more leaning towers out there? I’m gonna tell you all about it. Also, you’ll find out why Venice is always flooded and why London’s Big Ben is tilting.