On January 11, 1922, 14-year-old Leonard Thompson became the first person to receive an injection of the hormone insulin for Type-1 diabetes—a disease that for millennia had been considered a death sentence for anyone who developed it. The breakthrough would be one of the most consequential in medical history, saving millions of lives.

Diabetes has been recognized as a distinct medical condition for more than 3,000 years, but its exact cause was a mystery until the 20th century. By the early 1920s, many researchers strongly suspected that diabetes was caused by a malfunction in the digestive system related to the pancreas gland, a small organ that sits near the liver. At that time, the only way to treat the fatal disease was through a diet low in carbohydrates and sugar and high in fat and protein. Instead of dying shortly after diagnosis, this diet allowed diabetics to live—for about a year.

In 1914, a political assassination in Sarajevo set off a chain of events that led to the outbreak of the most costly war ever fought to that date. As more and more young men were sent down into the trenches, influential voices in the United States and Britain began calling for the establishment of a permanent international body to maintain peace in the postwar world. President Woodrow Wilson became a vocal advocate of this concept, and in 1918 he included a sketch of the international body in his 14-point proposal to end the war.

In November 1918, the Central Powers agreed to an armistice to halt the killing in World War I. Two months later, the Allies met with conquered Germany and Austria-Hungary at Versailles to hammer out formal peace terms. President Wilson urged a just and lasting peace, but England and France disagreed, forcing harsh war reparations on their former enemies. The League of Nations was approved, however, and in the summer of 1919 Wilson presented the Treaty of Versailles and the Covenant of the League of Nations to the U.S. Senate for ratification

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Common Sense, published on this day in 1776, Thomas Paine published Common Sense, a 50-page pamphlet that sold more than 500,000 copies within a few months and called for a war of independence that would become the American Revolution.

Source:

Library of Congress, Washington, D.C.

On January 9, 1493, explorer Christopher Columbus, sailing near what is now the Dominican Republic, sees three “mermaids”—in reality manatees—and describes them as “not half as beautiful as they are painted.” Six months earlier, Columbus (1451-1506) set off from Spain across the Atlantic Ocean with the Nina, Pinta and Santa Maria, hoping to find a western trade route to Asia. Instead, his voyage, the first of four he would make, led him to the Americas, or “New World.”

Mermaids, mythical half-female, half-fish creatures, have existed in seafaring cultures at least since the time of the ancient Greeks. Typically depicted as having a woman’s head and torso, a fishtail instead of legs and holding a mirror and comb, mermaids live in the ocean and, according to some legends, can take on a human shape and marry mortal men. Mermaids are closely linked to sirens, another folkloric figure, part-woman, part-bird, who live on islands and sing seductive songs to lure sailors to their deaths.

Mermaid sightings by sailors, when they weren’t made up, were most likely manatees, dugongs or Steller’s sea cows (which became extinct by the 1760s due to over-hunting). Manatees are slow-moving aquatic mammals with human-like eyes, bulbous faces and paddle-like tails. It is likely that manatees evolved from an ancestor they share with the elephant. The three species of manatee (West Indian, West African and Amazonian) and one species of dugong belong to the Sirenia order. As adults, they’re typically 10 to 12 feet long and weigh 800 to 1,200 pounds. They’re plant-eaters, have a slow metabolism and can only survive in warm water.

Manatees live an average of 50 to 60 years in the wild and have no natural predators. However, they are an endangered species. In the U.S., the majority of manatees are found in Florida, where scores of them die or are injured each year due to collisions with boats.

Source: history.com