Tyrannosaurus Rex Articles

• 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
• Human Evolution
  Early Humans
  Anthropology
  Fossils
  Origin of Life
  Evolution
   
  

  Homo antecessor

  Homo antecessor is an extinct hominin species that was discovered by E. Carbonell, J.L. Arsuaga and J.M. Bermudez de Castro. They are one of the earliest known hominins in Europe, with those from 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
• Evolution
  Charles Darwin
  Human Evolution
  Origin of Life
  Dinosaurs
  Early Humans
   
  

  Evolution of the horse

  The evolution in the structure of their teeth, odd-toed limbs, obvious mobility of the upper lip, and other aspects, joins the horse to the evolutionary line of odd-toed, hoofed mammals: the ... > more
• Charles Darwin
  Evolution
  Origin of Life
  Archaeology
  Fossils
  Anthropology
   
  

  Pelycosaur

  The pelycosaurs were smallish to large (up to 3 meters or more) primitive Late Paleozoic synapsid reptiles. They appeared during the Late Carboniferous and reached their acme in the early part of the ... > more
• Early Humans
  Human Evolution
  Anthropology
  Fossils
  Origin of Life
  Cultures
   
  

  Homo erectus

  Homo erectus ("upright man") is a hominin species that is believed to be an ancestor of modern humans (with Homo heidelbergensis usually treated as an intermediary step). The species is found from ... > 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
• Inorganic Chemistry
  Chemistry
  Sports Science
  Physics
  Materials Science
  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
• 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
• Volcanoes
  Natural Disasters
  Fossils
  Origin of Life
  Earthquakes
  Earth Science
   

  Supervolcano

  A supervolcano refers to a volcano that produces the largest and most voluminous kinds of eruption on Earth. The actual explosivity of these eruptions varies, but the sheer volume of extruded magma ... > more

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