Why Do Songs Get Stuck in Your Head?

Marcus asks: Why do songs get stuck in your head? Whether yours is “Call Me Maybe,” “Who Let the Dogs Out,” “Mickey,” or something equally infectious, at one time or another, you’ve probably had a fragment from a catchy (or obnoxious) tune stuck in your head. Where Do Sticky Songs Come From? Due to the involuntary nature of songs getting […]

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The Eradication of Smallpox

Despite ethnic, religious, regional and political differences, every now and then people are able to set aside disagreements, look to their common humanity, and make the world a better place. Perhaps one of the greatest and most inspiring examples of such global cooperation has been the eradication of smallpox. The Disease Caused by either of two related viruses, Variola major […]

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This Day in History: July 29th

This Day In History: July 29, 1981 On July 29, 1981, the Fairytale Wedding of the Century took place at St. Paul’s Cathedral in London. The handsome prince stood at the altar awaiting his young and beautiful blushing bride who had won his heart over all the other girls in the kingdom. The Lady arrived at the church a mere […]

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The First Female Presidential Candidate of a Major Political Party in the United States

On January 27, 1964, then three-term Senator Margaret Chase Smith put the first crack in the “hardest, highest glass ceiling” when she announced her candidacy for the Republican nomination for President of the United States. Although she never really came close to winning it, Senator Smith’s presidential campaign helped dispel centuries of chauvinism and paved the way for female political […]

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Is Cannibalism Unhealthy or Just Awful?

Mark K. asks: I was just wondering if a human ate another human in an apocalyptic scenario or something would this be unhealthy or just awful and gross? Yes. Unhealthy For the Devourer Depending on what parts are eaten (the most infected include the brain, spinal cord, bone marrow and small intestine), human cannibals run the risk of contracting a […]

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This Day in History: July 28th

This Day In History: July 28, 1794 On July 28, 1794, the man who was once the hero of the French Revolution suffered an astounding fall from grace. His zealousness and tireless devotion to “The Cause” made him the obvious choice to lead the Revolution during its most radical phase known as the Reign of Terror. Ironically, the very qualities […]

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Weekly Wrap Volume 48

This is a weekly wrap of our Daily Knowledge Newsletter. You can get that newsletter for free here. What Ever Happened to Confederate President Jefferson Davis? Jefferson Davis was attending a Sunday church service in the capital of the Confederacy, Richmond, Virginia, when he heard the news. Union General Ulysses S. Grant had broken General Robert E. Lee’s defenses in […]

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Podcast Episode #194: Piggyback

In this Weekend Why episode of the podcast, you’re going to learn why we call it “piggyback” when we carry someone on our back. [TRANSCRIPT] Don’t miss future episodes of this podcast, subscribe here: iTunes | RSS/XML You can also find more episodes by going here: Daily Knowledge Podcast

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This Day in History: July 25th

This Day In History: July 25, 306 Constantine the Great is probably best remembered for being the first Christian Roman emperor, but he was a ruler of historical significance for other reasons as well. When Constantius was appointed as one of the two caesares, or junior emperors, of the Tetrarchy in 293, his son Constantine went to Nicomedia to serve […]

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Podcast Episode #191: Walking in Space

In this episode of the podcast, you’re going to learn who was the first to walk in space, how he came very close to getting stuck out there, and the many complications that happened as the two men tried to return to Earth. [TRANSCRIPT] Don’t miss future episodes of this podcast, subscribe here: iTunes | RSS/XML You can also find […]

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A Brief History of Pi

That the ratio of the circumference of a circle to its diameter is constant has been known to humanity since ancient times; yet, even today, despite 2000 years of thought, theories, calculations and proofs, π’s precise value remains elusive. Ancient Civilizations Babylonian By the 17th century B.C., the Babylonians had a relatively advanced knowledge of mathematics, that they memorialized into […]

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