Ainan Cawley has been heralded as the most intelligent eight-year-old in the world. After acing his GCSEs at age seven, the boy wonder is already studying college alongside his adult contemporaries in Singapore.

Cawley started to read at just eight-months-old and can recite Pi - the number starting 3.14 that gives the ratio of a circle's circumference to its diameter - to 518 decimal places. He also knows the periodic table by heart.