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A cataclysmic flood could have filled the Mediterranean Sea — which millions of years ago was a dry basin — like a bathtub in the space of less than two years. A new model suggests that at the flood’s peak water poured from the Atlantic into the Mediterranean basin at a rate one thousand times the flow of the Amazon River, according to calculations published in the Dec. 10 Nature.

Our Discussion Forum is the largest gathering of alternate history fans on the internet.

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Alternate history is the exercise of looking at the past and asking "what if"? What if some major historical event had gone differently, and how could that have changed the world? Popular "what if" questions that you may have seen in fiction include "what if the Nazis had won the Second World War?" and "what if the South had won the US Civil War?", but it can be just as interesting to think about Aztecs resisting Spanish colonization or a Japan that did not turn its back on the world under the Shogunate. Alternate history is a literary genre, but here we're mainly interested in history itself - and the politics, strategy, culture, and more that define it. We spend most of our time debating our own ideas about history and how it could have gone differently, so this is a community focused on creativity and learning.

This domain is dedicated to the teaching of knowledge that was hidden from the human race all through history.

The I Ching, or Book of Changes, is the most widely read of the five Chinese Classics. The book was traditionally written by the legendary Chinese Emperor Fu Hsi (2953-2838 B.C.). It is possible that the the I Ching originated from a prehistoric divination technique which dates back as far as 5000 B.C. Thus it may be the oldest text at this site. Futher commentaries were added by King Wen and the Duke of Chou in the eleventh century B.C.

It's almost a truism in the tech world that copyright owners reflexively oppose new inventions that do (or might) disrupt existing business models. But how many techies actually know what rightsholders have said and written for the last hundred years on the subject?

Yarynich is talking about Russia's doomsday machine. That's right, an actual doomsday device—a real, functioning version of the ultimate weapon, always presumed to exist only as a fantasy of apocalypse-obsessed science fiction writers and paranoid über-hawks. The thing that historian Lewis Mumford called "the central symbol of this scientifically organized nightmare of mass extermination." Turns out Yarynich, a 30-year veteran of the Soviet Strategic Rocket Forces and Soviet General Staff, helped build one.

T his phenomenon of simultaneous discovery—what science historians call “multiples”—turns out to be extremely common. One of the first comprehensive lists of multiples was put together by William Ogburn and Dorothy Thomas, in 1922, and they found a hundred and forty-eight major scientific discoveries that fit the multiple pattern. Newton and Leibniz both discovered calculus. Charles Darwin and Alfred Russel Wallace both discovered evolution. Three mathematicians “invented” decimal fractions. Oxygen was discovered by Joseph Priestley, in Wiltshire, in 1774, and by Carl Wilhelm Scheele, in Uppsala, a year earlier. Color photography was invented at the same time by Charles Cros and by Louis Ducos du Hauron, in France. Logarithms were invented by John Napier and Henry Briggs in Britain, and by Joost Bürgi in Switzerland.

It seems to be a constant throughout history: In every period, people believed things that were just ridiculous, and believed them so strongly that you would have gotten in terrible trouble for saying otherwise.

Is our time any different? To anyone who has read any amount of history, the answer is almost certainly no. It would be a remarkable coincidence if ours were the first era to get everything just right.

For three centuries, the publishing industry has been working very hard to obscure copyright's true origins, and to promote the myth that it was invented by writers and artists. Even today, they continue to campaign for ever stronger laws against sharing, for international treaties that compel all nations to conform to the copyright policies of the strictest, and most of all to make sure the public never asks exactly who this system is meant to help.

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