mammals

31 05, 2017

What is an aurochs? Central Asian Environment

By |2019-02-06T08:28:00-08:00May 31st, 2017|Central Asia, Environment|Comments Off on What is an aurochs? Central Asian Environment

Cave painting of a herd of aurochs (about 14000 BC) When did the aurochs evolve? Around fifty million years ago, after the dinosaurs died, large mammals started to evolve from smaller mammals [...]

28 05, 2017

Reptile and Mammal Skeletons – Evolution and Biology

By |2018-04-16T09:09:50-07:00May 28th, 2017|Biology|Comments Off on Reptile and Mammal Skeletons – Evolution and Biology

Evolution of skeletons: Skeleton of a dinosaur Evolution of skeletons From frogs, there evolved reptiles like crocodiles and dinosaurs. Some of these reptiles lived mostly or entirely on land, so [...]

28 05, 2017

Why do we have fingers? Skeletons, Evolution, and Biology

By |2017-05-28T00:38:23-07:00May 28th, 2017|Biology|Comments Off on Why do we have fingers? Skeletons, Evolution, and Biology

Human hand bones The first fingers and toes evolved from earlier fish fins about 400 million years ago. During the Devonian period, the oceans were very shallow, and some fish [...]

27 05, 2017

How do animals breathe? Respiration, Evolution, Biology

By |2018-04-21T11:56:44-07:00May 27th, 2017|Biology|Comments Off on How do animals breathe? Respiration, Evolution, Biology

Fish gills The first cells, which evolved about 3.8 billion years ago, needed carbon dioxide to live and not oxygen. They needed the carbon dioxide to help them break down [...]

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