Near-Earth Object Impact Articles

• Microbes and More
  Microbiology
  Fungus
  Developmental Biology
  Soil Types
  Organic
   

  Microorganism

  A microorganism or microbe is an organism that is so small that it is microscopic (invisible to the naked eye). Microorganisms are often illustrated using single-celled, or unicellular organisms; ... > more
• Severe Weather
  Storms
  Tornadoes
  Hurricanes and Cyclones
  Snow and Avalanches
  Geography
   
  

  1993 North American storm complex

  The 1993 North American storm complex, also known as the (Great) Blizzard of 1993, or the Storm of the Century, was a large cyclonic storm that occurred on March to March 15, 1993, on the East Coast ... > more
• Geography
  Earth Science
  Ozone Holes
  Global Warming
  Forest
  Rainforests
   
  

  Tropic of Cancer

  The Tropic of Cancer, or Northern tropic is one of the five major circles of latitude that mark maps of the Earth. It is the parallel of latitude that lies currently 23 degrees 26′ 22″ ... > more
• Organic
  Soil Types
  Agriculture and Food
  Acid Rain
  Geochemistry
  Sustainability
   

  Fertilizer

  Fertilizers or fertilisers are compounds given to plants with the intention of promoting growth; they are usually applied either via the soil, for uptake by plant roots, or by foliar spraying, for ... > more
• Tsunamis
  Natural Disasters
  Water
  Oceanography
  Wildfires
  Ecosystems
   
  

  Ocean surface wave

  Ocean surface waves are surface waves that occur at the surface of an ocean. They usually result from distant winds or geologic effects and may travel thousands of miles before striking land. They ... > more
• Storms
  Severe Weather
  Tornadoes
  Geomagnetic Storms
  Air Pollution
  Geography
   
  

  Dust storm

  A dust storm (or sandstorm in some contexts) is a meteorological phenomenon. Such a storm is usually the result of convection currents created by intense heating of the ... > more
• Global Warming
  Oceanography
  El Nino and La Nina
  Climate
  Floods
  Geography
   
  

  Sea level

  Mean sea level (MSL) is the average (mean) height of the sea, with reference to a suitable reference surface. Defining the reference level, however, involves complex measurement, and accurately ... > more
• Early Climate
  Climate
  Ice Ages
  Global Warming
  Geology
  Environmental Issues
   
  

  Paleoclimatology

  Paleoclimatology is the study of climate change taken on the scale of the entire history of the earth. Glaciers are a widely employed instrument in paleoclimatology. The ice in glaciers has hardened ... > more
• Geography
  Weather
  Severe Weather
  Climate
  Earth Science
  Global Warming
   
  

  Monsoon

  A monsoon is a periodic wind, especially in the Indian Ocean and southern Asia. The word is also used to label the season in which this wind blows from the southwest in India and adjacent areas that ... > more
• Earthquakes
  Natural Disasters
  Sports Science
  Tsunamis
  Technology
  Electronics
   
  

  Seismometer

  Seismometer are used by seismologists to measure and record seismic waves. By studying seismic waves, geologists can map the interior of the Earth, and measure and locate earthquakes and other ground ... > more

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