Geographical Articles

• Insects (including Butterflies)
  Zoology
  Exotic Species
  Invasive Species
  Agriculture and Food
  Animals
   
  

  Moth

  A moth is an insect closely related to the butterfly. Moths, and more particularly their caterpillars, are a major agricultural pest in many parts of the world. Moths are apparently attracted to ... > more
• Weapons Technology
  Renewable Energy
  Energy and the Environment
  Physics
  Nuclear Energy
  Geomagnetic Storms
   
  

  Radioactive decay

  Radioactive decay is the set of various processes by which unstable atomic nuclei (nuclides) emit subatomic particles (radiation). Decay is said to occur in the parent nucleus and produces a daughter ... > more
• Nuclear Energy
  Renewable Energy
  Energy and the Environment
  Weapons Technology
  Physics
  Environmental Science
   
  

  Nuclear fission

  Nuclear fission is a process in nuclear physics in which the nucleus of an atom splits into two or more smaller nuclei as fission products, and usually some by-product particles. Hence, fission is a ... > more
• Air Pollution
  Acid Rain
  Geochemistry
  Organic Chemistry
  Soil Types
  Organic
   
  

  Nitrogen

  Nitrogen is the chemical element in the periodic table that has the symbol N and atomic number 7. Nitrogen constitutes 78 percent of Earth's atmosphere and is a constituent of all living tissues. ... > more
• Sports Science
  Materials Science
  Inorganic Chemistry
  Chemistry
  Hurricanes and Cyclones
  Severe Weather
   
  

  Polytetrafluoroethylene

  Polytetrafluoroethylene (PTFE) is a fluoropolymer discovered by Roy J. Plunkett (1910–1994) of DuPont in 1938. It was introduced as a commercial product in 1946 and (in an example of a ... > more
• Mating and Breeding
  New Species
  Extinction
  Life Sciences
  Wild Animals
  Agriculture and Food
   
  

  Rotifer

  The rotifers make up a phylum of microscopic, and near-microscopic pseudocoelomate animals. There are a variety of different shapes of rotifer. There is a well-developed cuticle which may be thick ... > more
• Statistics
  Mathematics
  Mathematical Modeling
  Math Puzzles
  Computer Modeling
  Computer Graphics
   
  

  Probability theory

  Probability theory is the mathematical study of phenomena characterized by randomness or uncertainty. More precisely, probability is used for modelling situations when the result of an experiment, ... > more

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