The history of the world is the recorded memory of the experience, around the world, of Homo sapiens. Ancient human history begins with the invention, independently at several sites on Earth, of writing, which created the infrastructure for lasting, accurately transmitted memories and thus for the diffusion and growth of knowledge. Nevertheless, an appreciation of the roots of civilization requires at least cursory consideration to humanity’s prehistory.
Human history is marked both by a gradual accretion of discoveries and inventions, as well as by quantum leaps, paradigm shifts, revolutions, that comprise epochs in the material and spiritual evolution of humankind.
Bonus Video: Great Minds: Carl Sagan – Pale Blue Dot

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The video was actually created by UppruniTegundanna http://www.youtube.com/watch?v=1hdXvMB639A
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