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The Cat in the Hat was published in 1957 and used a mere 236 words to tell the quirky feline's fantastical story. However, the book's author, Dr. Seuss, topped that feat with even fewer words when his publisher, Bennett Cerf, bet him that he couldn't write a book using 50 words or less. Green Eggs and Ham hit bookstores three years later and uses exactly 50 words.

Italian athletes Simone Frediani and Daniele Pecci earned the world record for the longest tennis rally ever on June 11, 2017. Hitting for more than 12 and a half hours straight—from 6:23 a.m. to 7 p.m.—the two took a total of 51,283 uninterrupted strokes, sipping from water-filled backpacks to hydrate without having to stop play. Any good tennis player will tell you that consistency is crucial, and we're pretty sure these two have that part of the game down pretty darn well.

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The majority of humans may be afraid of great white sharks, but that doesn't mean that the sharp-toothed ocean predators don't have fears of their own, one of them being another kind of big swimmer: orcas, also known as killer whales. In fact, a 2019 study published in the journal Nature suggests they're so terrified of the ferocious whales that they'll avoid an area for up to a year if they encounter one even if it's just passing by.

As the study's lead author Salvador Jorgensen explained, "When confronted by orcas, white sharks will immediately vacate their preferred hunting ground and will not return for up to a year, even though the orcas are only passing through."