Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Take a chunk of red cabbage and whizz it up in a blender with some warm tap water. Pour through a sieve ...

Get amazed by what nature is capable to do and, why not, learn how to perform this easy demonstration at home. Red cabbage contains pH-sensitive dyes, anthocyanins, the same type of dyes responsible ...