rdfs:comment
| - Marsupials are the first of the two great groups of therian (live-bearing) mammals, distinguished by their tendency to expel the embryo from the womb at a very early stage, and then nurse the infant externally while it develops. The clade in which they are part of, the metatheres, originated in the Early Cretaceous, possibly in North America, and then spread around the globe. Today, marsupials are most numerous in Australia , where almost every mammal belong to that order. They also exist in great numbers in South America and some dwell in Eurasia and North America.
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abstract
| - Marsupials are the first of the two great groups of therian (live-bearing) mammals, distinguished by their tendency to expel the embryo from the womb at a very early stage, and then nurse the infant externally while it develops. The clade in which they are part of, the metatheres, originated in the Early Cretaceous, possibly in North America, and then spread around the globe. Today, marsupials are most numerous in Australia , where almost every mammal belong to that order. They also exist in great numbers in South America and some dwell in Eurasia and North America. For the most part, Spec's metatherians are normal, diminutive Spec mammals, but this rule of thumb is not always followed. The Pliocene and Pleistocene brought with them massive environmental changes that did much to loosen the dinosaurs' hold on terrestrial niches. The Ice Age replaced the forest and jungle of the dinosaur world with tundra and steppe, driving many clades to extinction and opening opportunities to others. The oceans were also open for colonization by mammals, and the otter-like selkies and each-uisges have made full advantage of this habitat, even going so far as to push the dinosaurian hesperornithians out of many of their niches over the course of the Neogene. NESODELPHIA (Malagasy 'possums')
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