I love computers but I think my slightly addled brain is just too stupid to quite understand how they work. Thankfully people like Matthias Wandel are looking out for me (although they probably don't ...

Equipped with a marble, some wood and the principles of potential energy, kinetic energy and gravity, one man built a remarkable machine that warps your very sense of what’s physically possible.

In the fever dream that was my youth, I was enamored with an odd sketch on Sesame Street featuring a ball that goes up and down a long, windy track before ending up as a pile of powder. This sequence ...

[youtube=http://www.youtube.com/watch?feature=player_embedded&v=X_iW9nrBtHI] Keeping with my theme of DIY projects as gifts, I present to you this little treat, a ...

While this is authentic footage of a genuine product, the "perpetual" marble machine does not operate infinitely without an additional energy source. Rather, it uses batteries and a magnet to create ...