Encyclopaedia Britannica

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Encyclopaedia Britannica

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On the hunt for natural or chance configurations? You’ve come to the right place. Here are a few of our favorite patterns: 1) The moiré pattern in physics is the wavy geometrical design that happens when one set of lines (straight or curved) is superposed onto another set.

Figure skating jumps are divided into two types: edge jumps and toe jumps, differentiated by their take-offs. Edge jumps take off using the edge of a skate, and include: - Axel - Loop - Salchow The axel is generally considered the most difficult jump in figure skating. 🧵⬇️

Maybe go light on the roast beast this year.

In 1609, Italian mathematician and philosopher Galileo created his own telescope and began observing the heavens. His discoveries were earthshaking, and in 1610, he wrote a book, 'Sidereus Nuncius' (The Sidereal Messenger), to describe what he'd seen.

(solemnly) You've had mail.

Published in Beeton’s Christmas Annual of 1887, the story marks the first appearance of Sherlock Holmes and Dr. Watson.

Homo erectus, the extinct species of the human genus, appears to have been the first human species to control fire, some 1,000,000 years ago. The species seems to have flourished until about 200,000 years ago before giving way to other humans including Homo sapiens.

The lutz is a difficult maneuver marked by a long backward arcing glide into the jump, and is landed on the opposite foot from the one used for takeoff. When a skater messes up this jump, the mistake is often called a “flutz.”

The toe loop begins with the skater moving backward and ends on the same foot used for takeoff. It is generally considered the easiest of the competitive jumps to perform. (Easy for us to say.)

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Want to feel young? We're still 250 million years away from Pangea Proxima.

We literally made a whole video about this.

Everything from the Apollo landing sites is still on the Moon... exactly where it was left. Congratulations to NASA and the Artemis II crew on a spectacular mission!

One of the first dinosaur fossils found in England was discovered in the 1600s. Scientist Robert Plot guessed that it was the leg bone of an elephant brought there by the Romans. After comparing it to elephant bones, he decided it was actually the thigh bone of a giant human.

The internet is chaotic; badgers are simple. Please enjoy this video of one of our favorite stout carnivores from our archives.

In honor of National Pet Day, we'd like to tip our hats to all the cat owners out there. Fifteen thousand years of cat-human relationships, and we're still figuring them out.

It's been a privilege and a pleasure to share our love of knowledge with you this year! Here are some of our most-liked posts of 2025.

Turns out cows may have beauty and brains.

On June 5, 1985, Ferris Bueller took the day off. On April 15, 1874, the first impressionist exhibition opened in Paris. The two were always bound to meet.

Loons feed mainly on fish, crustaceans, and insects, which you could say are their heated rivals.

President John F. Kennedy’s address at Rice University stressed the importance of the United States becoming an international leader in space exploration. May times of stress bring out the determination in all of us.

There's a lot happening on the internet, so we hope this video of a black skimmer feeding at twilight brings a moment of relaxation. Sound up for maximum zen.

Happy 99th birthday to the man who has 50 over organisms named after him, including frogs, carnivorous plants, dragonflies, trees, and massive fossilized plesiosaurs. Cheers, Sir David Attenborough.

On March 10, 1876, Alexander Graham Bell made the first successful telephone call to inventor Thomas Augustus Watson. Years later, Watson was recorded describing that first call ⬇️

2025: Year in Review Relive the big events of this year with us.

Yams and sweet potatoes are botanically not even closely related, but are often confused for one another. What's the difference between these plants?

A hummingbird typically weighs less than a marshmallow which is so cute we can’t think about anything else. Please consider this fact and video your timeline cleanse for the day.

How do hurricanes get their names?

What you see in your "mind's eye" may be very different from the people around you...

Ranked choice voting was invented in the 1850s in Europe for multi-winner elections, and later adapted to its current single-winner form. The first use of RCV in the U.S. occurred in 1915, when Ashtabula, Ohio, used it to elect its city council. Here's how it works.