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1000 BCE
Hominids appear (6 million years ago)
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276 BCE
eratosthenes
Eratosthenes was an ancient Greek astronomer, geographer, and mathematician. He lived from 276 to 194 B.C. Eratosthenes is most famous for making the first accurate measurement of the circumference of the Earth. He lived and worked for most of his life in the city of Alexandria in Egypt.Jul 31, 2007 -
100 BCE
Ptolemy (100 AD)
considered Earth the center of the universe
ancient astronomer,geographer, and mathemetician -
Feb 19, 1473
copernicus
He had a heliocentric view and made a model to represent it -
Dec 14, 1546
brahe
Tycho Brahe was a Danish nobleman, astronomer, and writer known for his accurate and comprehensive astronomical observations -
1561
bacon
he was best known for his promotion of the scientific method -
Feb 15, 1564
Galileo
Known for making an improved version of the telescope we use today and discovering certain moons -
Dec 27, 1571
kepler
german astronomer, mathematician, and atrologer. hes best known for his laws of planetary motion. -
descartes
his theory on the separation between the mind and the body went on to influence subsequent Western philosophies. -
locke
ohn Locke was among the most famous philosophers and political theorists of the 17th century. He is often regarded as the founder of a school of thought known as British Empiricism, and he made foundational contributions to modern theories of limited, liberal government. -
newton
He is most well known for creating the three laws of motion -
mendeleev
known for making the periodic table of elements -
curie
discovered the elements radium and podium -
leavitt
she is best known for discovering about 2,400 variable stars -
alfred wegener
Continental drift was a theory that explained how continents shift position on Earth's surface. Set forth in 1912 by Alfred Wegener, a geophysicist and meteorologist, continental drift also explained why look-alike animal and plant fossils, and similar rock formations, are found on different continents -
hubble
helped prove the universe is expanding and created a classification system for galaxies -
harry hess
Harry Hammond Hess was a geologist and a United States Navy officer in World War II. Considered one of the "founding fathers" of the unifying theory of plate tectonics, Rear Admiral Harry Hammond Hess was born on May 24, 1906, in New York City.