It's False - The deer bot fly tops the insect speed stakes, clocking a staggering 90 miles per hour.

It's True A woman proudly wearning a string of pearls is effectively displaying a necklace of dead worms! Pearls form when the larvae from a parasitic flatworm, carried by seabirds, burrows into an oyster. The oyster responds by turning it into a pearl!

It's True - it all adds up because the average person loses about 31 million brain cells from the main part of their cerebral cortex every year.

It's True When old red blood cells are destroyed by the immune system the iron-containing part of the haemoglobin they contain is broken up by enzymes to produce a yellow substance called bilirubin. This is normally removed from the body by the liver. But if the bilirubin isn’t removed quickly enough, which can happen in people with liver disease, it accumulates in the skin, giving it a yellow colour.

It's False Sound does travel faster in water than air, but only 4 times faster, at 1500 metres per second (compared with about 350 metres per second in air)

It's True - doesn't sound like much but that's a long time - try it !

It's False - The Earth completes one revolution every 24 hours which is why we have days and nights.

It's True - The massive whale shark and basking sharks are perfectly harmless to humans because neither have big teeth, instead they both filter tiny plankton out of the water.

It's False There are about 5 million oxygen-carrying red blood cells in each cubic millimetre (also known as a microlitre) of blood. This means that there are about 10 million million red blood cells (one followed by 13 zeros) in every one of us.

It's False – It actually lasted 29 hours. It’s also worth bearing in mind that not all humans kiss each other – there are some tribes that don’t – eskimos rub their noses together instead of kissing – as do most animals.