Дипротодон — крупнейшее известное сумчатое, когда-либо обитавшее на земле. Дипротодоны относятся к автралийской мегафауне — группе необычных видов, живших в Австралии в период приблизительно от 1,6 миллионов до 40 тысяч лет назад. Их кости, включая полные черепа и скелеты, а также волосы и следы были найдены во многих местах Австралии. Иногда обнаруживаются скелеты самок вместе со скелетами детёнышей, когда-то находившихся в сумке.

Плейстоцен — эпоха, начавшаяся 2,588 миллиона лет назад и закончившаяся 11,7 тысяч лет назад. Ей предшествует эпоха плиоцена, а последовательницей является эпоха голоцена.

Для Евразии плейстоцен был характерен разнообразием животного мира, в который входили слоны(Palaeoloxodon antiquus),мамонты(Mammuthus primigenius), шерстистые носороги(Coelodonta antiquitatis), эласмотерии(Elasmotherium), бизоны и яки, гигантские большерогие олени(Megaloceros giganteus), дикие лошади(Equus stenonis), верблюды, медведи, как существующие ныне, так и вымершие(Ursus spelaeus), гигантские гепарды(Acinonyx pardinensis), пещерные и гигантские гиены(Pachycrocuta brevirostris), львы(Panthera (Leo) spelaea), гомотерии(Homotherium), страусы и многочисленные антилопы. В позднем плейстоцене большая часть существовавшей мегафауны вымерла. Предполагается, что вымирание вызвали новые болезни или первобытные охотники, либо оно произошло в результате изменения климата или комбинации всех факторов.

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Canis dirus or «awful» wolf - one of the largest canine that ever lived on the Earth and the largest representative of the subfamily of wolf (Caninae). «Awful» wolves were at their sizes like a large modern gray wolves (Canis lupus) and weighed, depending on gender and individual differences, 55 to 80 kg. Morphologically «awful» wolves were very similar to modern wolves, but these two species are not as closely related as it may seem at first sight. Homeland gray wolves - Eurasia, and the «awful» wolf as a type formed in North America. So genetically «awful» wolf closer to the coyote (natives of America), rather than the gray wolf. «Awful» wolf has differed from his gray neighbor with his head, a few larger to the body. The molar teeth of this predator were more massive than those of modern wolves. In general, the skull of this species looks like a very large skull of an ordinary wolf. Being stronger and overweight animals, therefore, less hardy, they can hunt very large prey, while a frisky gray wolves attacked the swift-footed prey.
Perhaps the «awful» wolves were less social than gray. Among the subfamilies of wolf (Caninae) truly schooling animal is the gray wolf. As related to him coyote, «awful» wolf is likely to create a small family groups, but not as large flocks like modern wolves.
Species of Canis dirus finally disappeared with the extinction of the mammoth megafauna about 10 thousand years ago.

East Asia was probably the center of origin Pantherinae. The oldest tiger fossils indicate that about two million years ago tigers were quite widespread in this region. However, the glacial and interglacial climatic variations and other geological events caused repeated changes in the geographic area. According to current information, the common ancestor of modern tiger is out of time parameters 157-72.000 years ago. This is much later than expected at the leopard, which is believed to be originated in Africa 825-470.000 years ago and arrived in Asia 300-170.000 years ago. Ngadon tiger was the largest subspecies of Panthera tigris. The body weight of this predator reached 400 kg, and height at the withers - 120 cm. Nobody could argue with such a giant, except perhaps awful American lion (Panthera (Leo) atrox), which was even greater. According to the assumptions of the last of genetic research, the tigers have almost entirely disappeared at the end of the Pleistocene era, maybe around 10.000-12.000 years ago. The small remaining part of population survived, probably in the territory of modern China. From this region the tigers again began to spread by migrating along the river following their prey closely - mainly deer and wild boars. Although the all continental tigers are closely related and can be considered as regional populations, rather than separate subspecies, they have developed definite physical and morphological properties to adapt to environmental conditions.