Geography of Greece. It is a peninsular and mountainous country located in Southern-Eastern Europe, in the Balkans peninsula. The country has the largest coastline in Europe (13,676km) due to its numerous islands. Greece has a total of 2,000 Greek islands but only 168 are inhabited.
Harry Hess created the theory of plate tectonics moving along the ocean's floor.
(plÃ¤ngk) German physicist who in 1900 formulated quantum theory, which explained and predicted certain phenomena that could not be accounted for in classical physics. Planck's theory was essential to the work of Albert Einstein, Niels Bohr, and many other modern physicists. In 1918 he won the Nobel Prize for physics.