Weekly Wrap Volume 147

This is a weekly wrap of our popular Daily Knowledge Newsletter. You can get that newsletter for free here.


While sharks aren’t exactly the ruthless predators most Hollywood features make them out to be (see: Do Sharks Really Not Like How Humans Taste?), they do possess a number of frighteningly efficient mechanisms to assist with aquatic hunting, including ultra-streamlined bodies, high intelligence, the ability to detect electrical fields and minute changes in water pressure, great hearing, incredibly sharp vision, amazing sense of smell (Lemon sharks can even detect tuna oil at a concentration of just one part per 25 million), and the topic of today- many rows of razor sharp teeth, including the ability to rapidly replace them. But are sharks actually able to grow an unlimited number of teeth…(more)


As a child, did you ever skin your knee and fear telling your parents, afraid of your mom breaking out the brown bottle of pain containing hydrogen peroxide to “help heal” your wound? Given the agony it caused, you might have wondered whether the fizzing liquid was actually helping, and why hydrogen peroxide bubbles when it comes in contact with your skin. If you’re still wondering today, well, wonder no more. To begin with, hydrogen peroxide does indeed kill bacteria, viruses, fungi and a whole host of pathogens thanks to the fact that it is…(more)

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Bonus Quick Facts

  • Ever wonder why we call junk messages “spam”? Well, wonder no more. While some have suggested that this was because SPAM (as in the Hormel meat product) is sometimes satirized as “fake meat”, thus spam messages are “fake messages”, this potential origin, while plausible enough on the surface, is not correct based on surviving documented evidence of when the term started being used to mean junk or unsolicited messages. The real origin of the phrase comes from a 1970 Monty Python’s Flying Circus skit. In this skit, all the restaurant’s menu items devolve into SPAM. When the waitress repeats the word SPAM, a group of Vikings in the corner sing “SPAM, SPAM, SPAM, SPAM, SPAM, SPAM, SPAM, SPAM, lovely SPAM! Wonderful SPAM!”, drowning out other conversation, until they are finally told to shut it.
  • Two of history’s most influential figures, Abraham Lincoln and Charles Darwin, were born just hours apart from one another on February 12, 1809, though separated by the Atlantic, with Lincoln born in a one room cabin in Hardin County, Kentucky, and Darwin born in his family’s home in Shrewsbury, England. They also both lost their mothers at a very young age within about a year and a half of one another, Nancy Lincoln dying in 1818 and Susannah Darwin in 1817. While these two titans of history never met, they did share a common view on the institution of slavery, with Darwin noting in a letter in 1861, “Some few, & I am one, even wish to God, though at the loss of millions of lives, that the North would proclaim a crusade against Slavery. In the long run, a million horrid deaths would be amply repaid in the cause of humanity. What wonderful times we live in…. Great God how I should like to see that greatest curse on Earth Slavery abolished.”
  • In The Phantom Menace, Qui-Gon Jinn’s communicator is just…

Pees (Peace) On Earth – I Didn’t Know Galactus’ Real Name Was Calvin?!

When an intergalactic being sets its sights on conquering planet Earth it typically does so to exploit our planet for its resources or to enslave humanity and use us as slaves. But Galactus is an intergalactic being of immense size, with an even more immense appetite, and he sees Earth as only one thing- food. Thankfully Galactus doesn’t go number one or two where he eats, so we don’t have to worry about the…