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Earth : 15 of 65

 
         
             
    The Sun, Center of our Solar System
  The Sun, Center of our Solar System
The Sun is the closest star to Earth and is the center of our solar system. A giant, spinning ball of very hot gas, the Sun is fueled by nuclear fusion reactions. The light from the Sun heats our planet and makes life possible. The Sun is also an act...
 
    Climate TimeLine Information Tool
  Climate TimeLine Information Tool
Exploring Weather & Climate Change Through the Powers of 10. Weather and climate are always in flux, always changing. At times the changes can be sudden and dramatic, while on other occasions the changes are subtle and occur over l...
 
    Pangaea, Supercontinent
  Pangaea, Supercontinent
Pangaea or Pangea is the name given to the supercontinent that existed during the Paleozoic and Mesozoic eras about 250 million years ago, before the process of plate tectonics separated each of the component continents into their current configurati...
 
    Environmental History Timeline
  Environmental History Timeline
Following conversations with other environmental historians. Long before Silent Spring, centuries before Greenpeace activists defied whalers' harpoons, many thousands of "green crusaders" tried to stop pollution, promote public health and preserve wi...
 
    Science Timeline
  Science Timeline
History of science timeline for biology, chemistry, physics, geology, mathematics, and philosophy of science...
 
    Eruption of Thera, Santorini
  Eruption of Thera, Santorini
Thera, or the modern island of Santorini, located sixty-nine miles north of the island of Crete in the Aegean Sea, was devastated by a volcanic eruption sometime in the 15th century BC. The eruption was one the the most powerful in the past 10,000 ye...
 
    Anaximander of Miletus, Philosopher
  Anaximander of Miletus, Philosopher
Anaximander, Ionian philosopher of Miletus, the first Greek known to have written (c.546) a book in prose, a treatise on nature, now lost except for one quotation. It was said that he introduced into Greece the gnomon (the vertical rod whose shadow i...
 
    Pytheas, Circumnavigated Britain
  Pytheas, Circumnavigated Britain
Pytheas was a Greek merchant, geographer and explorer from the Greek colony Massilia (today Marseille). He made a voyage of exploration to northwestern Europe around 325 BC. He probably travelled around a considerable part of Great Britain, circumnav...
 
    Eratosthenes, Measuring the Earth
  Eratosthenes, Measuring the Earth
Eratosthenes of Cyrene was a Greek scholar who lived and worked in Cyrene and Alexandria. Eratosthenes was director of the famous library in Alexandria, and is known for numerous important contributions to mathamatics, geography, and astronomy. In pa...
 
    Hipparchus, Astronomer
  Hipparchus, Astronomer
Hipparchus was the most important Greek astronomers of his time. He very accurately cataloged over 1,000 stars and invented the mathematical science of trigonometry. Ptolemy was a great admirer of Hipparchus's research and recorded some of it in his...
 
    Posidonius, Greek Philosopher
  Posidonius, Greek Philosopher
Posidonius of Apameia or of Rhodes was a Greek Stoic philosopher, politician, astronomer, geographer, historian and teacher native to Apamea, Syria. He was acclaimed as the greatest polymath of his age. None of his vast body of work can be read in it...
 
    Strabo, Greek Historian
  Strabo, Greek Historian
Strabo was a Greek historian, geographer and philosopher. Strabo is mostly famous for his 17-volume work Geographica, which presented a descriptive history of people and places from different regions of the world known to his era. Although the Geogra...
 
    Zhang Heng, Chinese Scientist
  Zhang Heng, Chinese Scientist
Zhang Heng was a Chinese astronomer, mathematician, inventor, geographer, cartographer, artist, poet, statesman, and literary scholar from Nanyang, Henan. He lived during the Eastern Han Dynasty (AD 25220) of China. He was educated in the capital c...
 
    Ptolemy, Astronomer / Geographer
  Ptolemy, Astronomer / Geographer
Ptolemy was a Roman citizen of Greek or Egyptian ancestry. He was a mathematician, astronomer, geographer, astrologer and a poet of a single epigram in the Greek Anthology. He lived in Egypt under the Roman Empire. Ptolemy was the author of several s...
 
    Pausanias, Description of Greece
  Pausanias, Description of Greece
Pausanias was a Greek traveler and geographer of the 2nd century AD, who lived in the times of Hadrian, Antoninus Pius and Marcus Aurelius. He is famous for his Description of Greece, a lengthy work that describes ancient Greece from firsthand observ...
 
         
         


 
 
         
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