Today, we have over 350 dog breeds, each with its own unique genetic make up — greater genetic diversity than any other land creature living now or extinct. (2ndchance.info)
In the Holy Cross Mountains of southern Poland, researchers have found tracks, like the one shown above, indicating that animals called «stem dinosaurs» first appeared about 250 million years ago — only a couple of million years after the great Permian - Triassic extinction, a catastrophic event that wiped out over 90 % of all marine species and over 75 % of land creatures on the planet. (sciencemag.org)
Populations of the world's tallest land creature fell to about 98,000 from an estimated 152,000 - 163,000 in 1985, according to the List compiled by the International Union for Conservation of Nature (IUCN). (scientificamerican.com)