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The 1925 "Journal of World Ice Theory" Welteislehre (WEL; "World Ice Theory" or "World Ice Doctrine"), also known as Glazial-Kosmogonie (Glacial Cosmogony), is a discredited cosmological concept proposed by Hanns Hörbiger, an Austrian engineer and inventor.
The evolution of the horse, a mammal of the family Equidae, occurred over a geologic time scale of 50 million years, transforming the small, dog-sized, [1] forest-dwelling Eohippus into the modern horse. Paleozoologists have been able to piece together a more complete outline of the evolutionary lineage of the modern horse than of any other animal.
Equus scotti is a true caballine horse that is more closely related to modern horses than to zebras and asses. Equus scotti may be synonymous with Equus lambei , another generally smaller horse known from the Pleistocene of North America, but this is uncertain. [ 3 ]
The world as we know it today has been shaped by horses. Think in agriculture, how important horses were as working animals. Think in New York or Washington 200 years ago, with carriages pulled by ...
The genus appears to have spread quickly into the Old World, with the similarly aged E. livenzovensis documented from western Europe and Russia. [11] Molecular phylogenies indicate that the most recent common ancestor of all modern equines (members of the genus Equus ) lived ~5.6 (3.9-7.8) Mya.
The true horse migrated from the Americas to Eurasia via Beringia, becoming broadly distributed from North America to central Europe, north and south of Pleistocene ice sheets. [12] It became extinct in Beringia around 14,200 years ago, and in the rest of the Americas around 10,000 years ago.
Identified with the current warm period, known as "Marine Isotope Stage 1", or MIS 1, the Holocene is considered an interglacial period in the current Ice Age. Horse remains dating from the Mesolithic period, or Middle Stone Age, early in the Holocene, have been found in Britain, though much of Mesolithic Britain now lies under the North Sea ...
At the other extreme, an early member of the order, the prehistoric horse Eohippus, had a withers height of only 30 to 60 cm (12 to 24 in). [5] Apart from dwarf varieties of the domestic horse and donkey, living perissodactyls reach a body length of 180–420 cm (71–165 in) and a weight of 150 to 4,500 kg (330 to 9,920 lb). [6]