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    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...
 
    Pangaea, Supercontinent   Pangaea, Supercontinent
Pangaea or Pangea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. It formed approximately 300 million years ago and then began to break apart after about 100 million years. Unlike the present Earth, much of the la...
 
    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...
 
 
78 - 139
  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...
 
 
90 - 168
  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...
 
 
120 - 180
  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...
 
 
560 - 636
  Isidore of Seville   Isidore of Seville
Saint Isidore of Seville was Archbishop of Seville for more than three decades and is considered, as the historian Montalembert put it in an oft-quoted phrase, "le dernier savant du monde ancien" ("the last scholar of the ancient world"). Indeed, all...
 
    The Mappa Mundi   The Mappa Mundi
The Mappa Mundi is unique in Britain's heritage - an outstanding treasure of the medieval age which reveals how 13th century scholars interpreted the world in spiritual and geographical terms. The map is undated but bears the name of "Richard de Hald...
 
    Prince Henry the Navigator   Prince Henry the Navigator
Henry the Navigator was an infante of the Kingdom of Portugal and an important figure in the early days of the Portuguese Empire. He was responsible for the early development of European exploration and maritime trade with other continents. Henry...
 
     

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