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The Gambian pouched rat (Cricetomys gambianus), also commonly known as the African giant pouched rat, is a species of nocturnal pouched rat of the giant pouched rat genus Cricetomys, in the family Nesomyidae. It is among the largest muroids in the world, growing to about 0.9 m (3 ft) long, including the tail, which makes up half of its total ...
Giant pouched rats are only distantly related to the true rats, although until recently they had been placed in the same family, Muridae. [1] Recent molecular studies, however, place them in the family Nesomyidae, part of an ancient radiation of African and Malagasy muroids. The name "pouched rat" refers to their large cheek pouches. The ...
The southern giant pouched rat is a large rodent, with males larger than females. Adult males typically weigh 1.5 to 2.0 kg (3.3 to 4.4 lb), while females weigh 1.2 to 1.6 kg (2.6 to 3.5 lb). The pouches for which these rats are named consist of oversized cheek-pouches.
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[15] [16] The Moon's gravitational pull stabilised Earth's fluctuating axis of rotation, setting up regular climatic conditions favoring abiogenesis. [17] 4404 Ma Evidence of the first liquid water on Earth which were found in the oldest known zircon crystals. [18] 4280–3770 Ma Earliest possible appearance of life on Earth. [19] [20] [21] [22]
Early mammals and possibly their eucynodontian ancestors had epipubic bones, which serve to hold the pouch in modern marsupials (in both sexes). 170-120 Ma Juramaia sinensis. Evolution of live birth , with early therians probably having pouches for keeping their undeveloped young like in modern marsupials.
The space rock that slammed into Earth 66 million years ago at the end of the Cretaceous Period caused a global calamity that doomed the dinosaurs and many other life forms.
It was originally thought to be 18 m (59 ft) long and more than 20 t (44,000 lb) in weight but later estimations suggest 11 m (36 ft) and 2–3 t (4,400–6,600 lb). Based on its fossils, the latter species was less massive and heavy than the other giant crocodilians, weighing an estimated 3 t (6,600 lb). [127] [128]