When people are thinking of the future of space travel, an idea that floats around is a spaceship with a giant solar sail pushed along by a massive laser. Inspired by the concept but lacking a giant ...

March 20, 2010 Add as a preferred source on Google Add as a preferred source on Google If you've been sitting around all week wondering how you could combine smoke, speakers, and a love of novel ...

The Ranque-Hilsch vortex tube is an interesting piece of equipment. It can, without any moving parts or chemicals, separate hot and cold compressed gasses that are passed through it. Interestingly ...