A study has shown that a male zebra finch is less likely to court a female zebra finch if he did not form any social friendships with female zebra finches when younger.

Octopi change colours when they become frightened. Normally they are a brownish colour, but can change to green or blue when fear sets in.

The microwave oven was invented after a researcher walked by a radar tube and a chocolate bar melted in his pocket.

AMAZING FACTS