On this day in 1982, four people in the greater Chicago area died after unknowingly ingesting Tylenol that had been laced with cyanide.

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On this day in 1885, an angry crowd of more than 2,000 people marched through the streets of Montreal after the city announced a mandatory vaccination program to fight the smallpox epidemic.

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On this day, Rachel Carson in 1962, a science writer and former marine biologist, published her landmark book, Silent Spring.

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On this day in 1904, New Zealand issued a government proclamation making it illegal to harm a beloved, wild dolphin named Pelorus Jack or any member of his species.

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On this day in 1962, a new exhibit opened at the Pasadena Art Museum in southern California, marking what’s believed to be the very first museum showing of Pop art.

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On this day in 622, the prophet Muhammad completed his Hegira, or “flight,” from the city of Mecca to what is now known as Medina.

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On this day in 1944, President Franklin Delano Roosevelt defended the reputation of his dog, who had recently been the subject of a political attack.

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On this day in 1985, nearly 80,000 people gathered in the rain to watch the first-ever Farm Aid concert at a university stadium in Champaign, Illinois.

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On this day in 1937, the first edition of J.R.R. Tolkien’s The Hobbit, went on sale in British bookstores.

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On this day in 1519, Portuguese explorer Ferdinand Magellan set sail with a crew of 270 sailors.on what would ultimately become the first successful voyage around the world.

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