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United States Army // Public Domain
United States Army // Public Domain

Watch Richard Feynman Explain Fire

United States Army // Public Domain
United States Army // Public Domain

Physicist Richard Feynman was a master explainer. His physics lectures are a model of clarity. His specialty is explaining one concept in the context of another concept the listener already understands.

In the video below, Feynman tackles the seemingly simple question: What is fire? This is a hard question for many of us to answer without referencing fire itself. Fire is burning. Fire is what happens when you light a match. Fire is a reaction. But aside from our existing knowledge of its effects (like flame), what is it and how does it happen? What else is fire like that we understand already?

In 1983, Feynman answered this question (among others) for the BBC on its Fun to Imagine series. He starts like so:

The atoms like each other to different degrees. Oxygen, for instance in the air, would like to be next to carbon, and if they're getting near each other, they snap together. If they're not too close though, they repel and they go apart, so they don't know that they could snap together.

It's just as if you have a ball that was [rolling and] trying to climb a hill and there was a hole it could go into. Like a volcano hole, a deep one. It's rolling along, and it doesn't go down in the deep [volcano] hole, because it starts to climb the hill and it rolls away again. But if you make it go fast enough, it'll fall into the hole.

So if you set something like wood in oxygen...there's carbon in the wood from a tree. And the oxygen comes and hits the carbon, but not hard enough. It just goes away again. The air is always [moving but] nothing's happening. If you can get it fast enough, by heating it up somehow...a few of [the atoms] come past, a few of them go over the top, so to speak.

So there you have it. If you understand what a volcano looks like and how a ball rolls under normal earth gravity, you have the start of this mental image for how fire works. Feynman's explanation manages to convey chemical behaviors in terms humans intuitively understand—the way a ball rolls—because that's the world we live in. Watch this for a delightful explanation:

The BBC has more clips (in better quality) at this slightly vintage website. You can also download the entire hour-long lecture from the Internet Archive.

[h/t: Kottke.org.]

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History
Royal Watch 1947: See Queen Elizabeth II Marry Prince Philip
AFP/Getty Images
AFP/Getty Images

In less than 24 hours, millions of royal enthusiasts will climb out of their beds at an ungodly hour, brew up the strongest pot of coffee they can manage, and watch Prince Harry and American actress Meghan Markle exchange their “I do”s. While gluing oneself to our personal electronics to witness all the lavish pomp and circumstance that surround a royal affair may seem like a relatively new pastime, the truth is that we’ve been doing it for years. Case in point: Queen Elizabeth II and Prince Philip’s 1947 wedding.

Though Elizabeth and Philip didn’t have dozens of television networks broadcasting their every step down the aisle, their nuptials did manage to attract more than 200 million earlobes, who listened in on the event via BBC Radio. Shortly thereafter, newsreel footage of the soon-to-be Queen’s big day made its way into movie theaters around the world. Now, thanks to the power of the internet, we can go back in time and tune in, too.

British Pathé has made a handful of videos from the wedding, which took place on November 20, 1947, available for streaming on YouTube. So if you want to start your royal marathon a little early, here’s your chance.

If you want to go back even further in time, The Royal Family’s YouTube channel includes footage of the 1923 wedding of Elizabeth’s parents, The Duke of York (later King George VI) and Lady Elizabeth Bowes-Lyon (later Queen Elizabeth The Queen Mother), which also took place at Westminster Abbey.

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entertainment
How to Craft the Perfect Gag, According to Buster Keaton
Buster Keaton seen with Donald O'Connor on the set of a film in 1957
Buster Keaton seen with Donald O'Connor on the set of a film in 1957
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Dubbed “The Great Stone Face” for his ability to hold a deadpan expression even as the world (quite literally) crashed down around him, Buster Keaton was “one of the three great silent comedians” in film history, according to filmmaker Tony Zhou.

A video by Zhou, spotted by The Kid Should See This, explains just how Keaton managed to pull off such memorable stunts, and why his scenes continue to influence modern actors and filmmakers. First, Keaton shunned title cards and subtitles, instead opting to advance the story through action. He disliked repetition and thought each movement should be unique, while also insisting on authenticity and proclaiming that a filmmaker should “never fake a gag.” If a gag couldn’t be captured all in one shot, he wouldn’t do it.

The angle and positioning of the camera was also paramount. Many of Keaton’s vaudeville-esque gags were visual in nature, toying with the viewer’s perspective to create illusions that led to hilarious reveals. But for that to be successful, the camera had to remain stationary, and the joke had to play out entirely onscreen.

A low-speed chase scene in Wes Anderson's The Grand Budapest Hotel, where Ralph Fiennes's Gustave H. runs up a long staircase in the background to escape cops, is a modern example of this. “Like Wes Anderson, Buster Keaton found humor in geometry,” Zhou says.

Check out Zhou’s video below.

[h/t The Kid Should See This]

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