The most distinctive feature of a camel is the hump on... back.

Although surfing disappeared from many parts of Polynesia in... early 20th century, a small number of people in Hawaii kept the tradition alive.

They can put... with very diffcult conditions, drinking only a little or... water for up to seven days.

For them, it was much... of an art.

The homing instinct is what makes certain animals, birds and fish return... the place they consider home.

In 1912, it spread to the east coast of the USA, and in particular to Virginia Beach,... became an important surfing centre.

However, cat owners, ... have to keep returning to their old addresses in... to bring their cat home, tend to find the homing instinct simply irritating.

A year later, the cat turned up at its old home even... this was 1360 km away from... its owners were now living.

In these humps, camels store fat... is used as enerdy when they don't have access to food.

The history of surfing undoubtedly goes... a long way.

It seems to... formed a central part of the culture of the Polynesian people, who where inhabitants of islands in the Pacific... as Samoa.

Cats often have this instinct. It was particularly strong in an American cat called Ninja, which disappeared shortly... its owners had taken it to their new home.

Pigeons also have the homing instinct and ever... ancient times, human beings have used them to carry messages back home.