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Egyptian pyramids
The pyramids of Egypt, some of which are among the largest man-made constructions ever conceived, constitute one of the most potent and enduring symbols of Ancient Egyptian civilization. It is ... > more -
Velociraptor
Velociraptor is a genus of dromaeosaurid theropod dinosaur that existed approximately 83 to 70 million years ago during the later part of the Cretaceous Period. There is only one universally ... > more -
Evolution of the eye
The evolution of the eye has been a subject of significant study, as a distinctive example of a homologous organ present in a wide variety of species. The development of the eye is considered by most ... > more -
Temperature record of the past 1000 years
The temperature record of the past 1000 years describes the reconstruction of temperature for the last 1000 years on the Northern Hemisphere. A reconstruction is needed because a reliable surface ... > more -
Little Ice Age
The Little Ice Age (LIA) was a period of cooling lasting approximately from the 14th to the mid-19th centuries, although there is no generally agreed start or end date: some confine the period to ... > more -
Cave painting
Cave or rock paintings are paintings painted on cave or rock walls and ceilings, usually dating to prehistoric times. Rock paintings have been made since the Upper Paleolithic, 40,000 years ago. They ... > more -
Brachiosaurus
The Brachiosaurus is a famous dinosaur that lived during the Jurassic period. One of the largest ever dinosaurs to walk the earth, it has become a famous animal synonymous with dinosaurs, and is ... > more
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