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To put in perspective the size of a googol, the mass of an electron, just under 10 −30 kg, can be compared to the mass of the visible universe, estimated at between 10 50 and 10 60 kg. [5] It is a ratio in the order of about 10 80 to 10 90, or at most one ten-billionth of a googol (0.00000001% of a googol).
Therefore, it requires 10 94 such books to print all the zeros of a googolplex (that is, printing a googol zeros). [4] If each book had a mass of 100 grams, all of them would have a total mass of 10 93 kilograms. In comparison, Earth's mass is 5.97 × 10 24 kilograms, [5] the mass of the Milky Way galaxy is estimated at 1.8 × 10 42 kilograms ...
The Fra Mauro map of 1459 shows a more detailed picture of Africa as a continent, including the Cape of Diab at its southernmost point, reflecting an expedition of 1420. Sebastian Münster 's Cosmographia (1545) labels the Cape of Good Hope , reached by Bartolomeu Dias in 1488, as caput bonae spei .
(10 9 days is roughly 2.738 million years.) About 10 9 months ago, dinosaurs walked the Earth during the late Cretaceous. (10 9 months is roughly 83.3 million years.) About 10 9 years—a gigaannus—ago, the first multicellular eukaryotes appeared on Earth. About 10 9 decades ago, the thin disk of the Milky Way started to form. (10 9 decades ...
Human habitation in North Africa has been greatly influenced by the climate of the Sahara (currently the world's largest warm desert), which has undergone enormous variations between wet and dry over the last few hundred thousand years. [2] This is due to a 41,000-year Axial tilt cycle in which the tilt of the earth changes between 22° and 24. ...
Today, the African plate is moving over Earth's surface at a speed of 32.51 km per million years relative to the Earth's "average" crust velocities (see NNR-MORVEL56) Map of East Africa showing some of the historically active volcanoes (red triangles) and the Afar Triangle (shaded, center) – a triple junction where three plates are pulling ...
Topography of Africa. There are many plateaus in Africa. The high southern and eastern plateaus, rarely falling below 600 m (2,000 ft), have a mean elevation of about 1,000 m (3,300 ft). The South African plateau, as far as about 12° S, is bounded east, west and south by bands of high ground which fall steeply to the coasts. On this account ...
10 000 000 000; short scale: ten billion; long scale: ten thousand million, or ten milliard) Biology – bacteria in the human body: There are roughly 10 10 bacteria in the human mouth. [29] Computing – web pages: approximately 5.6 × 10 10 web pages indexed by Google as of 2010.