Ping-pong balls have many uses: apart from playing table tennis, they have been used for countless art projects, science experiments, and even to raise ships from the bottom of the ocean.

The diameter of ping pong balls is a mismatch for the spacing of LEDs on a strip. The solution? A bit of force. The technique we want to highlight is not the fact that he used table tennis balls ...

Tape one half of a ping pong ball over each of your eyes, sit under red-gel lamps and listen to white noise – and then prepare to enter a very surreal world. A weekly summary of the big stories ...