Ancient Civilization Articles

• Frogs and Reptiles
  Animals
  Wild Animals
  Fish
  Endangered Animals
  Extinction
   
  

  American Alligator

  The American Alligator has a large, slightly rounded body, with thick limbs, a broad head, and a very powerful tail. Males can weigh 500 lbs to over 1000 pounds; one American Alligator allegedly ... > more
• Geography
  Fossils
  Earth Science
  Geology
  Origin of Life
  Environmental Policy
   

  Cenozoic

  The Cenozoic Era is the most recent of the four classic geological eras. The Cenozoic is divided into two periods, the Palaeogene and Neogene, and they are in turn divided into epochs. The Palaeogene ... > more
• Cell Biology
  Molecular Biology
  Genetics
  Biotechnology
  Biochemistry Research
  Life Sciences
   
  

  Structural alignment

  Structural alignment is a form of sequence alignment based on comparison of shape. These alignments attempt to establish equivalences between two or more polymer structures based on their shape and ... > more
• Early Humans
  Human Evolution
  Anthropology
  Fossils
  Cultures
  Evolution
   
  

  Homo habilis

  Homo habilis ("handy man", "skillful person") is a species of the genus Homo, which lived from approximately 2.5 million to 1.8 million years ago at the beginning of the Pleistocene. The definition ... > more
• Apes
  Human Evolution
  Early Humans
  Sports Medicine
  Endangered Animals
  Healthy Aging
   
  

  Common Chimpanzee

  The Common Chimpanzee, also known as the Robust Chimpanzee, is a great ape. Colloquially, it is often called the chimpanzee (or simply "chimp"), though technically this term refers to both species in ... > more
• Evolutionary Biology
  Evolution
  Charles Darwin
  Nature
  Human Evolution
  Early Humans
   
  

  Parallel evolution

  Parallel evolution is the independent evolution of similar traits, starting from a similar ancestral condition. Frequently this is the situation in more closely related lineages, where several ... > more
• Geology
  Earthquakes
  Earth Science
  Natural Disasters
  Near-Earth Object Impacts
  Atmosphere
   
  

  Crust (geology)

  In geology, a crust is the outermost layer of a planet. The crust of the Earth is composed of a great variety of igneous, metamorphic, and sedimentary rocks. The crust is underlain by the mantle. ... > more
• Dinosaurs
  Geography
  Environmental Policy
  Charles Darwin
  Origin of Life
  Paleontology
   

  Jurassic

  The Jurassic period is a major unit of the geologic timescale that extends from about 200 Ma (million years ago) at the end of the Triassic to 146 Ma at the beginning of the Cretaceous. The Jurassic ... > more
• Extinction
  Dinosaurs
  Endangered Animals
  Endangered Plants
  Fossils
  Early Climate
   
  

  Extinction event

  An extinction event (also extinction-level event, ELE) occurs when a large number of species die out in a relatively short period of time. Since life began on Earth, a number of major mass ... > more
• Dinosaurs
  New Species
  Paleontology
  Nature
  Extinction
  Animals
   
  

  Stegosaurus

  Stegosaurus, meaning "plated lizard", because of the plates on its back was a genus of large herbivorous dinosaurs from the Upper Jurassic of North America. It is among the most easily identifiable ... > more

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