how flat does a surface have to be to be considered flat? And from that stems a fascinating story of the evolution of precision machining. A bodger’s pole lathe in action. Simon Speed ...

Researchers in Australia have discovered that water generates an electrical charge up to 10 times greater than previously ...

What is it that is actually causing the gravity to make things fall off the end? A flat surface is fairly unstable, the other forces it would be flexible and move around. More from Tech Stuart ...