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Solving the puzzle of the extinction of the dinosaurs in China...

Resurgence of the hump - humpback whales are safe from extinction...

Amphibians Are Threatened With Extinction Worldwide...

Thousands of moose have died off in an area that was once prime habitat for these gentle giants. Biologists fear that global warming is responsible for the Minnesota Moose Mystery.

The polar bear has been garnering a lot of attention in recent weeks as wildlife biologists fear the shrinking Arctic ice sheets are endangering the existence of this top predator at the top of the world. But there is another gentle giant that is getting far less attention, and they may be in far worse trouble -- the mighty moose.

The frozen zoo is a collection of biological materials from a wide variety of rare and critically endangered species.The biological material is composed of gametes (sperm and oocytes),embryos,serum,tissue samples (cell lines) and other items.It represents a genetic bank vault,an archive or irreplaceable genetic information that can be preserved for perhaps hundreds of years.It is stored in specialised holding tanks filled with liquid nitrogen at a temperature of -196 degrees Celsius or -373 degrees Fahrenheit.If a species nears extinction and its genes are lost,some samples can be thawed and by using assisted reporductive techinques,offspring can be produced.The collected gametes in the frozen zoo are also used in the process of artificial insemination,embryo transfer,and invitro-fertilization.

The American Bison four hundred years ago numbered around 74 million and roamed all over the North American plains. But at the turn of the 20 century their numbers were down to around 1,000 and many people thought the American Bison would be extinct soon. However now in the early years of the 21 century the American Bison population is around 500,000 which is wonderful.

The endangered Fijian ground frog is being saved from extinction on the island of Viwa thanks to the efforts of New Zealand conservation knowledge.