Haitian Revolution Napoleon Louisiana Purchase sale

Haiti’s revolution helped double the size of the United States

Napoleon hoped to rebuild a French empire in the Americas, with the wealthy Caribbean colony of Saint-Domingue at its center. But the Haitian Revolution and France's failed attempt to regain control undermined that plan. In 1803, Napoleon sold Louisiana to the United States, roughly doubling its territory.

Kant imagined other galaxies long before telescopes confirmed them

In 1755, philosopher Immanuel Kant suggested that some faint nebulae might be enormous systems of stars comparable to the Milky Way. At the time, astronomers did not know whether these cloudy patches lay inside our galaxy or far beyond it. Only in the twentieth century did observations establish that many were separate galaxies. Kant had proposed the possibility long before it could be tested.

The burst thought to have caused the Carrington Event arrived fast

17.6 hours

A burst of material from the Sun, thought to have caused the 1859 Carrington Event, traveled about 150 million km to Earth in 17.6 hours. Such bursts typically take several days to arrive.

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Haitian Revolution Napoleon Louisiana Purchase sale

Haiti’s revolution helped double the size of the United States

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