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Video: Metrodome Roof Collapse

The Hubert H. Humphrey Metrodome opened in 1982. Its signature feature is its Teflon-coated fiberglass fabric roof that is literally inflated by the air inside the stadium. The stadium is pumped full of air to keep the roof up. This requires people to enter and exit the dome via airlocks, to maintain positive pressure within the playing field area.

Over the weekend, the roof collapsed under a heavy load of snow -- and the dramatic collapse was caught on video (see below). But this is the fifth time a "deflation event" has happened. Wikipedia explains the other four:

Five times in the stadium's history, heavy snows or other weather conditions have damaged the roof and caused it to deflate. On November 19, 1981, a rapid accumulation of over a foot of snow caused the roof to collapse, requiring it to be re-inflated. It deflated the following winter on December 30, 1982, again because of a tear caused by heavy snow. This was four days before the Vikings played the Dallas Cowboys in the last regular season game of the 1982 NFL season. In the spring following that same winter, on April 14, 1983, the Metrodome roof deflated because of a tear caused by a late-season heavy snow, and the scheduled Twins' game with the California Angels was postponed. On April 26, 1986, the Metrodome roof suffered a slight tear because of high winds, causing a nine-minute delay in the bottom of the seventh inning vs. the Angels.

And here's the fifth:

The Boston Globe has before and after photos.

(Via Kottke.org.)

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Carl Court, Getty Images
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Is There a Limit to How Many Balls You Can Juggle?
Carl Court, Getty Images
Carl Court, Getty Images

In 2017, a juggler named Alex Barron broke a record when he tossed 14 balls into the air and caught them each once. The feat is fascinating to watch, and it becomes even more impressive once you understand the physics behind it.

As WIRED explains in a new video, juggling any more than 14 balls at once may be physically impossible. Researchers who study the limits of juggling have found that the success of a performance relies on a number of different components. Speed, a.k.a. the juggler's capacity to move their hands in time to catch each ball as it lands, is a big one, but it's not the most important factor.

What really determines how many balls one person can juggle is their accuracy. An accurate juggler knows how to keep their balls from colliding in midair and make them land within arm's reach. If they can't pull that off, their act falls apart in seconds.

Breaking a juggling world record isn't the same as breaking a record for sprinting or shot put. With each new ball that's added to the routine, jugglers need to toss higher and move their hands faster, which means their throws need to be significantly more accurate than what's needed with just one ball fewer. And skill and hours of practice aren't always enough; according to expert jugglers, the current world records were likely made possible by a decent amount of luck.

For a closer look at the physics of juggling, check out the video below.

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Bowman Gum - Heritage Auctions, Public Domain, Wikimedia Commons
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11 Timeless Yogi Berra Quotes
Bowman Gum - Heritage Auctions, Public Domain, Wikimedia Commons
Bowman Gum - Heritage Auctions, Public Domain, Wikimedia Commons

The great Yogi Berra—a 10-time World Series champion and three-time MVP—was one of baseball's best catchers, but he's remembered just as much for his wit and wisdom as his Hall of Fame career. Here are some of the quotes attributed to Yogi (who was born on May 12, 1925), even if he didn't always say them first.

1. "Always go to other people's funerals, otherwise they won't go to yours."

2. "The future ain't what it used to be." (Yogi later clarified, saying, "I just meant that times are different. Not necessarily better or worse, just different.")

3. "A nickel ain't worth a dime anymore."

4. "It ain't over 'til it's over."

5. "When you come to a fork in the road, take it." (See Quote Investigator)

6. "Nobody goes there anymore. It's too crowded." (See Quote Investigator)

7. "We have a good time together, even when we're not together."

8. "It's déjà vu all over again." (See Quote Investigator)

9. "Baseball is 90 percent mental. The other half is physical."

10. "I really didn't say everything I said."

11. "Then again, I might have said 'em, but you never know."

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