The relationship between friction and load, quantified three centuries ago, has an exception when the interaction causes ...

Why is electromagnetic repulsion so infrequently used in applications? As in, using an electromagnet to repel a permanent magnet, rather than to attract a magnet or ferrous material? I was doing some ...

Anyone who saw Back to the Future II was disappointed when 2015 rolled around with nary a hoverboard in sight. There have been various attempts to fake it, but none of them quite have the feel of ...