Dinosaur Articles

• 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
• Sports Science
  Inorganic Chemistry
  Chemistry
  Physics
  Textiles and Clothing
  Nature of Water
   
  

  Iridium

  Iridium is a chemical element in the periodic table that has the symbol Ir and atomic number 77. A dense, very hard, brittle, silvery-white transition metal of the platinum family, iridium is used in ... > more
• Fossils
  Paleontology
  Evolution
  Early Mammals
  Dinosaurs
  Charles Darwin
   
  

  Fossil

  Fossils are the mineralized or otherwise preserved remains or traces (such as footprints) of animals, plants, and other organisms. The totality of fossils and their placement in fossiliferous ... > more
• Early Humans
  Human Evolution
  Origin of Life
  Evolution
  Nature
  Evolutionary Biology
   
  

  Timeline of evolution

  This timeline of the evolution of life outlines the major events in the development of life on the planet Earth. Dates given are estimates based on scientific evidence. In biology, evolution is the ... > more
• Dolphins and Whales
  Early Mammals
  Sea Life
  Marine Biology
  Animals
  Early Humans
   
  

  Evolution of cetaceans

  The cetaceans (whales, dolphins and porpoises) are descendants of land-living mammals, and remnants of their terrestrial origins can be found in the fact that they must breathe air from the surface; ... > more
• Extinction
  Endangered Animals
  Endangered Plants
  New Species
  Nature
  Exotic Species
   
  

  Extinction

  In biology and ecology, extinction is the cessation of existence of a species or group of taxa, reducing biodiversity. The moment of extinction is generally considered to be the death of the last ... > more
• Early Humans
  Human Evolution
  Anthropology
  Evolution
  Charles Darwin
  Origin of Life
   
  

  Timeline of human evolution

  The timeline of human evolution outlines the major events in the development of humans species and the evolution of human's ancestors. It begins with the time of the origin of life and presents a ... > more
• Cultures
  Ancient Civilizations
  Archaeology
  Early Climate
  Early Humans
  Human Evolution
   
  

  Stone Age

  The Stone Age is a broad prehistoric time period during which humans widely used stone for toolmaking. Stone tools were made from a variety of different kinds of stone. For example, flint and chert ... > more
• Rodents
  Animals
  Mammals
  Early Mammals
  Mice
  Evolution
   
  

  Rodent

  Rodentia is an order of mammals also known as rodents, characterised by two continuously-growing incisors in the upper and lower jaws which must be kept short by gnawing. Forty-percent of mammal ... > more
• Birds
  Early Birds
  Bird Flu Research
  Zoology
  New Species
  Animals
   
  

  Bird

  Birds are bipedal, warm-blooded, oviparous vertebrates characterized primarily by feathers, forelimbs modified as wings, and hollow bones. Birds range in size from the tiny hummingbirds to the huge ... > more

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