ANNUAL RED CRAB MIGRATION ON CHRISTMAS ISLAND

It is called one of earth's most spectacular migrations and is hailed as one of the wonders of the natural world.

During the monsoon season, the red crabs scurry simultaneously through rainforests to the Indian Ocean.

Scientists say a hormone is key to the usually sedentary species' sudden move.

The bright red land crabs are native to the small island, which is an Australian territory but is near Indonesia, and there are an estimated 120m living there.

They dig burrows in almost every square metre of available soil or live in deep crevices in rock outcrops. For most of the year, a crab will settle in one place, living in their burrow.

But during the monsoon season, in late November or early December the crabs undergo a breeding migration.

They travel several kilometers over a few days, through the rainforest, to eventually reach the sea where they mate and spawn.

2012 SUMMER OLYMPIC GAMES

The 2012 Summer Olympic Games, officially the Games of the XXX Olympiad, also known informally as London 2012, began in London, United Kingdom on 27 July and will continue until 12 August 2012. The first event, the group stages in women's football, began two days earlier on 25 July. Around 10,500 athletes from 204 National Olympic Committees (NOCs) are expected to participate.  wiki