Modern taxonomy classifies all dinosaurs as reptiles and not birds or mammals because most of the characteristics of dinosaurs are found in reptiles than in the latter species. Most of the giant dinosaurs went extinct after the meteor strike, but smaller ones such as the Xixianykus evolved into birds. DidRead More →

Whales are mammals which means that, like humans and other land mammals, they have three inner ear bones and hair, they breathe air, and the females produce milk through mammary glands and suckle their young. Is a sea whale a mammal? Marine mammals are found in marine ecosystems around theRead More →

Penguins are birds, so they do have wings. However, the wing structures of penguins are evolved for swimming, rather than flying in the traditional sense. Penguins swim underwater at speeds of up to 15 to 25 miles per hour . As adept swimmers, penguins spend a lot of time inRead More →