This CGI drawing shows the possible appearance of Yangchuanosaurus, a dinosaur from the late Jurassic Period (around 157 million years ago) that may have been up to 10 metres (33 feet) in length. Yangchuanosaurus was a Theropod dinosaur...

The Awash valley contains one of the most important groupings of palaeontological sites on the African continent. The remains found at the site, the oldest of which date back at least 4 million years, provide evidence of human evolution...

View authentic prints of Posada's famous work, las calaveras. This site contains 6 different pieces of Posada's work.

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Labeled diagram of the morphology of a child's skill.