All over the world there are species of animals and plants that are said to be "endangered". By calling them endangered, scientists say that they think the species will become extinct if something isn't done about them. Many more species are now threatened with extinction than ther should be because of many reasons. A species becomes endangered when there are fewer and fewer individuals of the species each year. There are many endagered species like the majestic Siberian tiger or the fascinating Polar Bear, which one day might be extinct and ....