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  • Lightning strikes some place on earth

  • about 100 times every second.

  • That's three billion times a year!

  • Consider that, your chances of being struck

  • are actually amazingly low.

  • So here in the U.S where we have pretty good statistics

  • your chances of being struck in a single year

  • are about 1 in 100,000

  • and about 1 in 3,000 over your whole lifetime.

  • These odds can vary a lot

  • depending on where you live and what your habits are, of course.

  • Like if you live in Tampa and you like to play golf

  • in July and you have no fear of storms your odds of getting zapped

  • are... yeah you're stupid!

  • But there are actually two different types of lightning strikes:

  • Direct and indirect.

  • Direct is like Zeus aiming at the bullseye

  • on the top of your head.

  • it also occurs if you're holding on to something

  • like a flagpole, for example, that is struck and it conducts the energy into you.

  • Indirect strikes hit the ground

  • and then run up your legs.

  • More people are injured in ground strikes

  • because the energy in them

  • can connect to multiple people at once.

  • So while the direct from above strike can hit

  • a person in a crowd

  • and leave everyone else alone,

  • indirect strikes could kill a whole herd of cows

  • in seconds.

  • And yeah, a lightning strike is no joke

  • it's a 300 kilavolt burst of energy

  • that can heat the air around it to 27,000 degrees celsius

  • which is about five times hotter than the surface of the freaking sun.

  • So, what exactly happens

  • when the fire of five suns zips through your flesh and blood?

  • Well, worst case of course, you die.

  • If the electrical current gets up in your skull,

  • it can actually cook your brain

  • like that famous egg in the anti-drug frying pan.

  • But the most common immediate cause of death by lightning is cardiac arrest,

  • as the shock instantly stops the strike victim's heart.

  • Surprisingly though, 70 to 90 percent of lightning strike victims survive.

  • I'm not saying they get back up and continue their game of golf unscathed,

  • because the resulting injuries can be severe

  • but if you're struck, you're more likely to survive than just die there on the spot.

  • And if you do survive, here's some of what you can expect:

  • The force of the bolt leaving your feet

  • could literally blow your shoes off.

  • Meanwhile, the super heat of the strike

  • could shred your clothing or set it on fire.

  • And if you're wearing a lot of jewelry, or say, an underwire bra,

  • all that metal could channel the electrical current and sear your skin.

  • The lightning bolt itself is probably going to leave deep wounds

  • where it enters and exits your body, so you're gonna get burned.

  • You might also end up with possibly the coolest scar on the planet.

  • The unique physics of electrical discharge leaves branch-like marks

  • called "Lichtenberg scarring" which occur as blood vessels burst.

  • And the bizzare fractcal scars

  • actually look like lightning.

  • It's like getting a free souveneir tattoo.

  • With that kind of electricity coursing through your body

  • you're also likely to end up with some damaged or totally fried nerves

  • which could lead to permanent numbness, the inability to register temperatures and partial paralysis.

  • Some strike survivors develop muscle twitches as well, similar to those in Parkinson's patients.

  • Also, not technically an effect of the lightning, your eardrums might rupture from the thunder.

  • For many strike survivors it's actually the initial trauma

  • that's the easiest part of the whole ordeal.

  • The mental and physical after effects are often plentiful and bizzare:

  • Memory loss, sleep disorders, tremors, loss of balance, intense headaches, chronic irritability, and resulting depression

  • are all common side effects.

  • Some of these symptoms may take months after the initial strike to manifest.

  • Because being struck is so rare, many doctors don't know how to help their patients.

  • This complaint, along with higher suicide rates in strike victims

  • has led to the formation of various lightning strike survivor support groups.

  • Roy Sullivan holds the the record for receiving the most lightning strikes, he was struck by lightning seven times

  • during his career in the forest service.

  • But though he survived the strikes initially, they may have eventually killed him when he took his own life

  • likely due to depression caused by repeated shocks to his brain.

  • Thanks for watching this SciShow dose

  • if you have any questions or comments or ideas, we're on Facebook and Twitter, and down in the comments below.

  • And if you want to keep getting smarter with us here at SciShow, you can go to

  • YouTube.com/SciShow and subscribe.

Lightning strikes some place on earth

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B1 中級

雷に打たれたらどうなるの? (What Happens If You're Struck By Lightning?)

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    ka ka に公開 2021 年 01 月 14 日
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