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David Blaine: How I Held My Breath for 17 Minutes

As a little light science-ish fare for Friday, here's a TED Talk in which David Blaine explains his quest to hold his breath for a really, really long time. He goes through a variety of possible "trick" techniques (none of which worked), and discusses his much-publicized failure to escape from handcuffs during his "Drowned Alive" feat. But then he gets to the interesting stuff -- a seemingly credible story of how he trained to do a sustained breath-hold after breathing pure oxygen. This is a different kind of record than the standard breath-hold, and Blaine did manage to break a Guinness World Record for "static apnea." What makes the story so credible is that other people actually had similar records, and Blaine's static apnea record has since been broken by Tom Sietas (the guy who held the record before Blaine and inspired Blaine's attempt). If only a few guys in the world are working on this record, it seems plausible that Blaine could make it happen.

But while this talk seems credible, it's interesting how we interact with what Blaine says. Can we ever trust him to tell the truth? Probably not: he's a magician, and deception is his M.O. Then again, he could choose to simply tell the truth once in a while. It's impossible for us to know for sure, and that strange balance between "Huh, he seems to be making sense here" versus "Yeah, but he's David Blaine and untrustworthy" makes for a fun twenty-minute video. Have a look, and let me know whether you believe him.

Content note: Part of this video might make you gag. Blaine discusses a "rebreather" made from a "Home Depot" plastic tube, and proceeds to show video of the insertion of this device down his throat; this video may be real or it may be a trick. In any case, you might want to look away during that video clip, as it is truly kind of grim and gross. (This section runs from roughly 4:30 through 4:55. Once he says "So that clearly wasn't gonna work," you're clear to watch again.) I was fine with it, but your mileage may vary.

Note the misdirection (several kinds) near the end.

See also: Wikipedia's account of this feat, which more or less matches up with what Blaine says...but is itself a potentially untrustworthy source. Probably credible: John Tierney's final NYT piece on the breath-holding record.

Disclaimer: DO NOT TRY THIS AT HOME. You may attempt talking kinda goofy mumbly Blaine-style if you wish, but not the breath-holding stuff.

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science
Why a Howling Wind Sounds So Spooky, According to Science
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Halloween is swiftly approaching, meaning you'll likely soon hear creepy soundtracks—replete with screams, clanking chains, and howling winds—blaring from haunted houses and home displays. While the sound of human suffering is frightful for obvious reasons, what is it, exactly, about a brisk fall gust that sends shivers up our spines? In horror movie scenes and ghost stories, these spooky gales are always presented as blowing through dead trees. Do bare branches actually make the natural wailing noises louder, or is this detail added simply for atmospheric purposes?

As the SciShow's Hank Green explains in the video below, wind howls because it curves around obstacles like trees or buildings. When fast-moving air goes around, say, a tree, it splits up as it whips past, before coming back together on the other side. Due to factors such as natural randomness, air speed, and the tree's surface, one side's wind is going to be slightly stronger when the two currents rejoin, pushing the other side's gust out of the way. The two continue to interact back-and-forth in what could be likened to an invisible wrestling match, as high-pressure airwaves and whirlpools mix together and vibrate the air. If the wind is fast enough, this phenomenon will produce the eerie noise we've all come to recognize in horror films.

Leafy trees "will absorb some of the vibrations in the air and dull the sound, but without leaves—like if it's the middle of the winter or the entire forest is dead—the howling will travel a lot farther," Green explains. That's why a dead forest on a windy night sounds so much like the undead.

Learn more by watching SciShow's video below.

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Space
SpaceX's Landing Blooper Reel Shows That Even Rocket Scientists Make Mistakes
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SpaceX's Falcon 9 rocket launches.
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On March 30, 2017, SpaceX did something no space program had done before: They relaunched an orbital class rocket from Earth that had successfully achieved lift-off just a year earlier. It wasn't the first time Elon Musk's company broke new ground: In December 2015, it nailed the landing on a reusable rocket—the first time that had been done—and five months later landed a rocket on a droneship in the middle of the ocean, which was also unprecedented. These feats marked significant moments in the history of space travel, but they were just a few of the steps in the long, messy journey to achieve them. In SpaceX's new blooper reel, spotted by Ars Technica, you can see just some of the many failures the company has had along the way.

The video demonstrates that failure is an important part of the scientific process. Of course when the science you're working in deals with launching and landing rockets, failure can be a lot more dramatic than it is in a lab. SpaceX has filmed their rockets blowing up in the air, disintegrating in the ocean, and smashing against landing pads, often because of something small like a radar glitch or lack of propellant.

While explosions—or "rapid unscheduled disassemblies," as the video calls them—are never ideal, some are preferable to others. The Falcon 9 explosion that shook buildings for miles last year, for instance, ended up destroying the $200 million Facebook satellite onboard. But even costly hiccups such as that one are important to future successes. As Musk once said, "If things are not failing, you are not innovating enough."

You can watch the fiery compilation below.

[h/t Ars Technica]

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