Why Kangaroos Live only in Australia? – 10 pics FacebookMessengerTwitterPinterestRedditMammals with placentas have evolved more rapidly than mammals with a bag. Thus, the marsupials from the many parts of the world were extinct, because they couldn't survive in the struggle with other mammals. 3 / 10 Pin Pages: 1 2 3 4 5 6 7 8 9 10
