| Name |
Edmontosaurus |
Tyrannosaurus |
Deinonychus |
Pachycephalosaurus |
Triceratops |
Apatosaurus |
Compsognathus |
| Food Source |
Herbivore |
Carnivore |
Carnivore |
Herbivore |
Herbivore |
Herbivore |
Carnivore |
| Length |
9 to 13 metres |
12 to 13 metres |
3 metres |
4.6 metres |
8 metres |
21 metres |
70-140cm |
| Weight |
3,500kg |
7,200kg |
80kg |
3,500kg |
6,100kg |
35,000kg |
2kg |
| Period |
Late Cretaceous |
Late Cretaceous |
Early Cretaceous |
Late Cretaceous |
Late Cretaceous |
Late Jurassic |
Late Jurassic |
| MY=Million Years |
71-65 MY |
71-65 MY |
146 MY |
71-65 MY |
71-65 MY |
161 to 145 MY |
161 to 145 MY |
For reference the Average Human, who is usually an Omnivore has an overall length of 1.8 metres and weighs in at about 80kg and first appeared in the Pleistocene era which was about 1.8 MY (million years ago) and the elephants (Elephantidae) is a family of pachyderm, and the only remaining family in the order Proboscidea in the class Mammalia. Elephantidae has three living species: the African Bush Elephant, the African Forest Elephant (until recently known collectively as the African Elephant), and the Asian Elephant (also known as the Indian Elephant). Other species have become extinct since the last ice age, which ended about 10,000 years ago.
It has long been known that the African and Asian elephants are separate species. African elephants tend to be larger than the Asian species (up to 4 m high and 7500 kg) and have bigger ears. Male and female African elephants have long tusks, while male and female Asian Elephants have shorter tusks, with tusks in females being almost non-existent. African elephants have a dipped back, smooth forehead and two "fingers" at the tip of their trunks, as compared with the Asian species which have an arched back, two humps on the forehead and have only one "finger" at the tip of their trunks.
Elephants are mammals, and the largest land animals alive today. The elephant's gestation period is 22 months, the longest of any land animal. At birth it is common for an elephant calf to weigh 120 kg (265 lb). An elephant may live as long as 70 years, sometimes longer. The largest elephant ever recorded was shot in Angola in 1956. It was male and weighed about 12,000 kg (26,400 lb), with a shoulder height of 4.2m, a metre taller than the average male African elephant. The smallest elephants, about the size of a calf or a large pig, were a prehistoric variant that lived on the island of Crete until 5000 BC, possibly 3000 BC. Elephants are increasingly threatened by human intrusion. Over the 20 year period between 1970 and 1989, the African elephant population plunged from 1.3 million to about 600,000; the current population is estimated to be between 400,000 and 660,000. The elephant is now a protected species worldwide, placing restrictions on capture, domestic use, and trade in products such as ivory. Just like the dinosaurs, the elephant is on the brink of extinction…
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