Animals Essay Example | Topics and Well Written Essays - 500 words

Animals - Essay Example climate changes, habitat destructions, diseases, natural disasters or speciation (some animals develop into totally new species) (â€Å"Extinct†). Our planet Earth, a home to wonderful diversity of living creatures, has hosted some incredibly unique species. Unfortunately, many of those weird animals that inhabited the world in the distant past are gone now. For example, Tyrannosaurus Rex became extinct around 65 million years ago (â€Å"Ten Most Amazing Extinct Animals†). As fossils of this enormous carnivore had been found, it became clear that Tyrannosaurus Rex was one of the biggest animals of all time, â€Å"measuring up to 43.3 feet long, and 16.6 ft tall, with an estimated mass that goes up to 7 tons† (â€Å"Ten Most Amazing Extinct Animals†) (Image 1). The Irish Elk (also known as Giant Deer) died out nearly 7, 700 years ago. It is believed to have been the biggest deer that ever inhabited our planet. Specifically, the Irish Elk was measured to hav e While animals became extinct due to various natural cataclysms in the past, they appear to be in danger or under threat of extinction today due to destructive human activity. These species are called endangered or threatened. According to the U.S. Endangered Species Act that was passed in 1973, two categories are distinguished as for the animals that risk becoming extinct: endangered and threatened. To specify, endangered species is defined as â€Å"... one that is in danger of extinction throughout all or a significant portion of its range† (â€Å"Facts about Endangered Species†). In its turn, a species is considered threatened if it is â€Å"... one that is likely to become endangered in the foreseeable future throughout all or a significant portion of its range† (â€Å"Facts about Endangered Species†). A good example of an endangered species is the American Alligator. This large alligator lives in wetlands in the Southeast of the United States and is s ometimes encountered by humans (Image 3). It