A Modern Stonehenge

This guy likes to play around with huge stones, and is building his own stonehenge—without modern tools! It’s not only cool to see, I think it also serves as a lesson. It may or may not be the way the stonehenge was built, but it goes to show that there are non-technological ways to do some impressive feats. All it takes is some basic knowledge of how large objects behave.

Fun with Sulphur Hexafluoride

Sulphur Hexafluoride is a completely transparent gas 6 times heavier than air. This means it works about exactly the opposite of Helium. Rather than making a persons voice high-pitched, it lowers it. Rather than making objects float on air, objects can float on Sulphur Hexafluoride. The end part of this video shows somebody float a foil boat in a container of Sulphur Hexafluride. It’s surreal.