Are we born to run? | Christopher McDougall | TEDxPennQuarter
-
0:07 - 0:09I'm going to talk about
reinventing running. -
0:09 - 0:12You know, it's basically just
right, left, right, left, yeah? -
0:12 - 0:14I mean, we've been doing it
for two million years, -
0:14 - 0:18so it's kind of arrogant to assume
that I've got something to say -
0:18 - 0:21that hasn't been said and performed
better a long time ago. -
0:21 - 0:23But the cool thing about running,
as I've discovered, -
0:24 - 0:27is that something bizarre happens
in this activity all the time. -
0:27 - 0:31Case in point: A couple months ago,
if you saw the New York City Marathon, -
0:31 - 0:34I guarantee you, you saw something
that no one has ever seen before. -
0:35 - 0:39An Ethiopian woman named Derartu Tulu
turns up at the starting line. -
0:40 - 0:41She's 37 years old.
-
0:41 - 0:44She hasn't won a marathon
of any kind in eight years, -
0:44 - 0:45and a few months previously,
-
0:46 - 0:47she had almost died in childbirth.
-
0:48 - 0:51Derartu Tulu was ready to hang it up
and retire from the sport, -
0:51 - 0:53but she decided she'd go for broke
-
0:53 - 0:57and try for one last big payday
in the marquee event, -
0:57 - 0:58the New York City Marathon.
-
0:58 - 1:02Except -- bad news for Derartu Tulu --
some other people had the same idea, -
1:02 - 1:04including the Olympic gold medalist,
-
1:04 - 1:07and Paula Radcliffe, who is a monster,
-
1:07 - 1:11the fastest woman marathoner
in history by far. -
1:11 - 1:13Only 10 minutes
off the men's world record, -
1:13 - 1:16Paula Radcliffe is essentially unbeatable.
-
1:17 - 1:18That's her competition.
-
1:18 - 1:21The gun goes off, and -- I mean,
she's not even an underdog; -
1:21 - 1:23she's, like, under the underdogs.
-
1:23 - 1:25But the under-underdog hangs tough,
-
1:25 - 1:28and 22 miles into a 26-mile race,
-
1:28 - 1:31there is Derartu Tulu,
up there with the lead pack. -
1:32 - 1:34Now, this is when something
really bizarre happens. -
1:34 - 1:38Paula Radcliffe, the one person
who is sure to snatch the big paycheck -
1:38 - 1:41from Derartu Tulu's under-underdog hands,
-
1:41 - 1:43suddenly grabs her leg
and starts to fall back. -
1:44 - 1:46So we all know what to do
in this situation, right? -
1:46 - 1:49You give her a quick crack
in the teeth with your elbow -
1:49 - 1:50and blaze for the finish line.
-
1:50 - 1:53Derartu Tulu ruins the script.
-
1:53 - 1:54Instead of taking off,
-
1:54 - 1:56she falls back and she grabs
Paula Radcliffe, -
1:56 - 1:59and says, "Come on.
Come with us. You can do it." -
1:59 - 2:01So Paula Radcliffe,
unfortunately, does it. -
2:01 - 2:03She catches up with the lead pack
-
2:03 - 2:05and is pushing toward the finish line.
-
2:05 - 2:06But then she falls back again.
-
2:06 - 2:09The second time, Derartu Tulu
grabs her and tries to pull her. -
2:09 - 2:12And Paula Radcliffe, at that point,
says, "I'm done. Go." -
2:13 - 2:15So that's a fantastic story,
and we all know how it ends. -
2:15 - 2:17She loses the check,
-
2:17 - 2:20but she goes home with something
bigger and more important. -
2:20 - 2:22Except Derartu Tulu
ruins the script again. -
2:22 - 2:26Instead of losing, she blazes
past the lead pack and wins. -
2:26 - 2:27Wins the New York City Marathon,
-
2:27 - 2:29goes home with a big fat check.
-
2:30 - 2:31It's a heartwarming story,
-
2:31 - 2:33but if you drill a little bit deeper,
-
2:33 - 2:37you've got to sort of wonder
about what exactly was going on there. -
2:37 - 2:39When you have two outliers
in one organism, -
2:39 - 2:40it's not a coincidence.
-
2:40 - 2:44When you have someone who is more
competitive and more compassionate -
2:44 - 2:47than anybody else in the race,
again, it's not a coincidence. -
2:47 - 2:49You show me a creature
with webbed feet and gills; -
2:49 - 2:51somehow water's involved.
-
2:51 - 2:54Someone with that kind of heart,
there's some kind of connection there. -
2:54 - 2:57And the answer to it,
I think, can be found -
2:57 - 2:59down in the Copper Canyons of Mexico,
-
3:00 - 3:03where there's a reclusive tribe,
called the Tarahumara Indians. -
3:03 - 3:07Now, the Tarahumara
are remarkable for three things. -
3:07 - 3:08Number one is:
-
3:08 - 3:13they have been living essentially
unchanged for the past 400 years. -
3:13 - 3:16When the conquistadors arrived
in North America you had two choices: -
3:16 - 3:19you either fight back and engage
or you could take off. -
3:19 - 3:21The Mayans and Aztecs engaged,
-
3:21 - 3:23which is why there are very few
Mayans and Aztecs. -
3:23 - 3:25The Tarahumara had a different strategy.
-
3:25 - 3:27They took off and hid
-
3:27 - 3:32in this labyrinthine, networking,
spider-webbing system of canyons -
3:32 - 3:34called the Copper Canyons.
-
3:34 - 3:37And there they've remained
since the 1600s, -
3:37 - 3:40essentially the same way
they've always been. -
3:41 - 3:44The second thing remarkable
about the Tarahumara is: -
3:44 - 3:47deep into old age -- 70 to 80 years old --
-
3:47 - 3:49these guys aren't running marathons;
-
3:49 - 3:51they're running mega-marathons.
-
3:51 - 3:52They're not doing 26 miles,
-
3:52 - 3:55they're doing 100, 150 miles at a time,
-
3:55 - 3:58and apparently without injury,
without problems. -
3:58 - 4:01The last thing that's remarkable
about the Tarahumara is: -
4:01 - 4:03all the things we're going
to be talking about today, -
4:03 - 4:06all the things we're trying to use
all of our technology -
4:06 - 4:08and brain power to solve --
-
4:08 - 4:10things like heart disease
and cholesterol and cancer; -
4:10 - 4:14crime, warfare and violence;
clinical depression -- all this stuff -- -
4:14 - 4:16the Tarahumara don't know
what you're talking about. -
4:16 - 4:20They are free from all
of these modern ailments. -
4:21 - 4:22So what's the connection?
-
4:22 - 4:24Again, we're talking about outliers;
-
4:24 - 4:26there's got to be some kind
of cause and effect. -
4:26 - 4:30Well, there are teams of scientists
at Harvard and the University of Utah -
4:30 - 4:33that are bending their brains
and trying to figure out -
4:33 - 4:35what the Tarahumara have known forever.
-
4:35 - 4:37They're trying to solve
those same kinds of mysteries. -
4:37 - 4:41And once again, a mystery
wrapped inside of a mystery -- -
4:41 - 4:44perhaps the key to Derartu Tulu
and the Tarahumara -
4:44 - 4:47is wrapped in three other
mysteries, which go like this: -
4:47 - 4:50Three things -- if you have the answer,
come up and take the microphone, -
4:50 - 4:52because nobody else knows the answer.
-
4:52 - 4:55If you know it, you're smarter
than anybody on planet Earth. -
4:55 - 4:56Mystery number one is this:
-
4:56 - 4:59Two million years ago,
the human brain exploded in size. -
4:59 - 5:01Australopithecus
had a tiny little pea brain. -
5:01 - 5:04Suddenly humans show up,
Homo erectus, big old melon head. -
5:04 - 5:06To have a brain of that size,
-
5:06 - 5:09you need to have a source
of condensed caloric energy. -
5:09 - 5:12In other words, early humans
are eating dead animals -- -
5:12 - 5:13no argument, that's a fact.
-
5:14 - 5:15The only problem is,
-
5:15 - 5:19the first edged weapons only appeared
about 200,000 years ago. -
5:19 - 5:22So somehow, for nearly two million years,
-
5:22 - 5:24we are killing animals
without any weapons. -
5:24 - 5:26Now, we're not using our strength,
-
5:26 - 5:28because we are the biggest
sissies in the jungle. -
5:28 - 5:31Every other animal
is stronger than we are, -
5:31 - 5:34they have fangs, they have claws,
they have nimbleness, they have speed. -
5:34 - 5:35We think Usain Bolt is fast.
-
5:35 - 5:38Usain Bolt can get
his ass kicked by a squirrel. -
5:38 - 5:39We're not fast.
-
5:39 - 5:40That would be an Olympic event:
-
5:40 - 5:43turn a squirrel loose,
whoever catches it gets a gold medal. -
5:43 - 5:44(Laughter)
-
5:44 - 5:47So no weapons, no speed,
no strength, no fangs, no claws. -
5:47 - 5:50How were we killing these animals?
Mystery number one. -
5:50 - 5:51Mystery number two:
-
5:51 - 5:54Women have been in the Olympics
for quite some time now, -
5:54 - 5:57but one thing that's remarkable
about all women sprinters: -
5:57 - 5:59they all suck; they're terrible.
-
5:59 - 6:03There's not a fast woman on the planet
and there never has been. -
6:03 - 6:06The fastest woman
to ever run a mile did it in 4:15. -
6:06 - 6:08I could throw a rock
and hit a high-school boy -
6:08 - 6:09who can run faster than 4:15.
-
6:09 - 6:12For some reason,
you guys are just really slow. -
6:12 - 6:13But --
-
6:13 - 6:14(Laughter)
-
6:14 - 6:17But, you get to the marathon
we were just talking about -- -
6:17 - 6:19you've only been allowed to run
the marathon for 20 years, -
6:19 - 6:22because prior to the 1980s,
medical science said -
6:22 - 6:25if a woman tried to run 26 miles --
does anyone know what would happen -
6:25 - 6:27if you tried to run 26 miles?
-
6:27 - 6:29Why you were banned
from the marathon before the 1980s? -
6:29 - 6:31Audience Member: Her uterus would be torn.
-
6:31 - 6:34Christopher McDougall:
Her uterus would be torn, yes. -
6:34 - 6:35Torn reproductive organs.
-
6:35 - 6:37The uterus would literally
fall out of the body. -
6:37 - 6:38(Laughter)
-
6:39 - 6:40Now, I've been to a lot of marathons,
-
6:40 - 6:42and I've yet to see any ...
-
6:42 - 6:45(Laughter)
-
6:45 - 6:46So it's only been 20 years
-
6:46 - 6:49that women have been allowed
to run the marathon. -
6:49 - 6:53In that very short learning curve,
you've gone from broken organs -
6:53 - 6:57up to the fact that you're only 10 minutes
off the male world record. -
6:57 - 6:59Then you go beyond 26 miles,
into the distance -
6:59 - 7:02that medical science also told us
would be fatal to humans -- -
7:02 - 7:04remember Pheidippides died
when he ran 26 miles -- -
7:04 - 7:08you get to 50 and 100 miles,
and suddenly, it's a different game. -
7:08 - 7:11You take a runner like Ann Trason
or Nikki Kimball or Jenn Shelton, -
7:11 - 7:14put them in a race of 50 or 100 miles
against anybody in the world, -
7:14 - 7:16and it's a coin toss who's going to win.
-
7:16 - 7:18I'll give you an example.
-
7:18 - 7:20A couple years ago,
Emily Baer signed up for a race -
7:20 - 7:22called the Hardrock 100,
-
7:22 - 7:24which tells you all you need
to know about the race. -
7:25 - 7:27They give you 48 hours
to finish this race. -
7:27 - 7:28Well, Emily Baer -- 500 runners --
-
7:29 - 7:31she finishes in eighth place,
in the top 10, -
7:31 - 7:33even though she stopped
at all the aid stations -
7:33 - 7:35to breastfeed her baby during the race.
-
7:35 - 7:36(Laughter)
-
7:36 - 7:38And yet, she beat 492 other people.
-
7:38 - 7:39The last mystery:
-
7:40 - 7:42Why is it that women get stronger
as distances get longer? -
7:42 - 7:44The third mystery is this:
-
7:44 - 7:47At the University of Utah,
they started tracking finishing times -
7:47 - 7:49for people running the marathon.
-
7:49 - 7:53What they found is that if you start
running the marathon at age 19, -
7:53 - 7:55you'll get progressively
faster, year by year, -
7:55 - 7:57until you reach your peak at age 27.
-
7:57 - 8:01And then after that,
you succumb to the rigors of time. -
8:01 - 8:03And you'll get slower and slower,
-
8:03 - 8:06until eventually you're back to running
the same speed you were at age 19. -
8:06 - 8:08So about seven, eight years
to reach your peak, -
8:08 - 8:11and then gradually you fall off your peak,
-
8:11 - 8:13until you go back to the starting point.
-
8:13 - 8:16You'd think it might take eight years
to go back to the same speed, -
8:16 - 8:19maybe 10 years -- no, it's 45 years.
-
8:19 - 8:2164-year-old men and women
-
8:21 - 8:24are running as fast
as they were at age 19. -
8:24 - 8:27Now, I defy you to come
up with any other physical activity -- -
8:27 - 8:30and please don't say golf --
something that's actually hard -- -
8:30 - 8:31(Laughter)
-
8:31 - 8:36where geriatrics are performing
as well as they did as teenagers. -
8:36 - 8:37So you have these three mysteries.
-
8:38 - 8:42Is there one piece in the puzzle
which might wrap all these things up? -
8:42 - 8:45You've got to be careful anytime
someone looks back in prehistory -
8:45 - 8:48and tries to give you
a global answer because, -
8:48 - 8:50it being prehistory, you can say
whatever the hell you want -
8:50 - 8:52and get away with it.
-
8:52 - 8:53But I'll submit this to you:
-
8:53 - 8:56If you put one piece in the middle
of this jigsaw puzzle, -
8:56 - 8:58suddenly it all starts
to form a coherent picture. -
8:58 - 9:00If you're wondering
why the Tarahumara don't fight -
9:01 - 9:02and don't die of heart disease,
-
9:02 - 9:05why a poor Ethiopian
woman named Derartu Tulu -
9:05 - 9:08can be the most compassionate
and yet the most competitive, -
9:08 - 9:12and why we somehow were able
to find food without weapons, -
9:12 - 9:14perhaps it's because humans,
-
9:14 - 9:17as much as we like to think of ourselves
as masters of the universe, -
9:17 - 9:20actually evolved as nothing more
than a pack of hunting dogs. -
9:21 - 9:24Maybe we evolved as a hunting pack animal.
-
9:24 - 9:27Because the one advantage
we have in the wilderness -- -
9:27 - 9:29again, it's not our fangs,
our claws or our speed -- -
9:30 - 9:32the only thing we do really well is sweat.
-
9:32 - 9:35We're really good
at being sweaty and smelly. -
9:35 - 9:38Better than any other mammal
on Earth, we can sweat really well. -
9:38 - 9:42But the advantage of that little bit
of social discomfort -
9:42 - 9:47is the fact that, when it comes to running
under hot heat for long distances, -
9:47 - 9:49we're superb -- the best on the planet.
-
9:49 - 9:51You take a horse on a hot day,
-
9:51 - 9:54and after about five or six miles,
that horse has a choice: -
9:54 - 9:57it's either going to breathe
or it's going to cool off. -
9:57 - 9:58But it ain't doing both. We can.
-
9:59 - 10:02So what if we evolved
as hunting pack animals? -
10:02 - 10:06What if the only natural advantage
we had in the world -
10:06 - 10:08was the fact that we could
get together as a group, -
10:08 - 10:11go out there on that African savanna,
pick out an antelope, -
10:11 - 10:13go out as a pack,
and run that thing to death? -
10:14 - 10:16That's all we could do.
-
10:16 - 10:18We could run really far on a hot day.
-
10:18 - 10:21Well, if that's true, a couple
other things had to be true as well. -
10:21 - 10:24The key to being part
of a hunting pack is the word "pack." -
10:24 - 10:26If you go out by yourself
and try to chase an antelope, -
10:26 - 10:29I guarantee there will be two cadavers
out in the savanna. -
10:29 - 10:31You need a pack to pull together.
-
10:31 - 10:33You need to have
those 64- and 65-year-olds -
10:33 - 10:35who have been doing this for a long time
-
10:35 - 10:38to understand which antelope
you're trying to catch. -
10:38 - 10:40The herd explodes
and it gathers back again. -
10:40 - 10:42Those expert trackers
have to be part of the pack. -
10:42 - 10:44They can't be 10 miles behind.
-
10:44 - 10:46You need the women
and the adolescents there, -
10:46 - 10:49because the two times in your life
you most benefit from animal protein -
10:49 - 10:52is when you're a nursing mother
and a developing adolescent. -
10:52 - 10:55It makes no sense to have
the antelope over there, dead, -
10:55 - 10:57and the people who want
to eat it 50 miles away. -
10:57 - 10:59They need to be part of the pack.
-
10:59 - 11:02You need those 27-year-old studs
at the peak of their powers -
11:02 - 11:03ready to drop the kill,
-
11:03 - 11:06and you need those teenagers
who are learning the whole thing involved. -
11:06 - 11:07The pack stays together.
-
11:07 - 11:11Another thing that has to be true:
this pack cannot be materialistic. -
11:11 - 11:14You can't be hauling all your crap around,
trying to chase the antelope. -
11:14 - 11:16You can't be a pissed-off pack.
-
11:16 - 11:19You can't be bearing grudges, like,
"I'm not chasing that guy's antelope. -
11:19 - 11:22He pissed me off.
Let him go chase his own antelope." -
11:22 - 11:24The pack has got to be able
to swallow its ego, -
11:25 - 11:26be cooperative, and pull together.
-
11:27 - 11:30What you end up with, in other words,
-
11:30 - 11:34is a culture remarkably similar
to the Tarahumara, -
11:34 - 11:37a tribe that has remained
unchanged since the Stone Age. -
11:38 - 11:39It's a really compelling argument
-
11:39 - 11:43that maybe the Tarahumara are doing
exactly what all of us had done -
11:43 - 11:44for two million years,
-
11:44 - 11:47that it's us in modern times
who have sort of gone off the path. -
11:47 - 11:51You know, we look at running
as this kind of alien, foreign thing, -
11:51 - 11:54this punishment you've got to do
because you ate pizza the night before. -
11:54 - 11:56But maybe it's something different.
-
11:56 - 11:59Maybe we're the ones who have taken
this natural advantage we had -
11:59 - 12:00and we spoiled it.
-
12:01 - 12:03How do we spoil it?
Well, how do we spoil anything? -
12:03 - 12:05We try to cash in on it. Right?
-
12:05 - 12:08We try to can it and package it
and make it "better" -
12:08 - 12:09and then sell it to people.
-
12:09 - 12:12And then what happened was,
we started creating -
12:12 - 12:15these fancy cushioned things
which can make running "better," -
12:15 - 12:17called running shoes.
-
12:17 - 12:20The reason I get personally
pissed-off about running shoes -
12:20 - 12:23is because I bought a million of them
and I kept getting hurt. -
12:23 - 12:25And I think if anybody in here runs --
-
12:25 - 12:26I just had a conversation with Carol.
-
12:26 - 12:30We talked for two minutes backstage,
and she talked about plantar fasciitis. -
12:30 - 12:33You talk to a runner,
I guarantee within 30 seconds, -
12:33 - 12:34the conversation turns to injury.
-
12:34 - 12:38So if humans evolved as runners,
if that's our one natural advantage, -
12:38 - 12:39then why are we so bad at it?
-
12:39 - 12:41Why do we keep getting hurt?
-
12:41 - 12:43A curious thing about running
and running injuries -
12:43 - 12:46is that the running injury
is new to our time. -
12:46 - 12:47If you read folklore and mythology,
-
12:48 - 12:50any kind of myths, any kind of tall tales,
-
12:50 - 12:53running is always associated
with freedom and vitality -
12:53 - 12:55and youthfulness and eternal vigor.
-
12:55 - 12:58It's only in our lifetime
that running has become associated -
12:58 - 12:59with fear and pain.
-
12:59 - 13:03Geronimo used to say, "My only friends
are my legs. I only trust my legs." -
13:03 - 13:07That's because an Apache triathlon
used to be you'd run 50 miles -
13:07 - 13:08across the desert,
-
13:08 - 13:11engage in hand-to-hand combat,
steal a bunch of horses, -
13:11 - 13:12and slap leather for home.
-
13:12 - 13:16Geronimo was never saying, "You know
something, my Achilles -- I'm tapering. -
13:16 - 13:17I've got to take this week off."
-
13:17 - 13:20Or, "I need to cross-train.
I didn't do yoga. I'm not ready." -
13:20 - 13:22(Laughter)
-
13:22 - 13:24Humans ran and ran all the time.
-
13:24 - 13:26We are here today.
We have our digital technology. -
13:26 - 13:28All of our science comes from the fact
-
13:28 - 13:32that our ancestors were able to do
something extraordinary every day, -
13:32 - 13:34which was just rely
on their naked feet and legs -
13:34 - 13:36to run long distances.
-
13:36 - 13:38So how do we get back to that again?
-
13:38 - 13:40Well, I would submit
to you the first thing is: -
13:40 - 13:43get rid of all packaging,
all the sales, all the marketing. -
13:43 - 13:45Get rid of all the stinking running shoes.
-
13:45 - 13:47Stop focusing on urban marathons,
-
13:47 - 13:50which, if you do four hours, you suck,
-
13:50 - 13:52and if you do 3:59:59, you're awesome,
-
13:52 - 13:54because you qualified for another race.
-
13:54 - 13:57We need to get back to that sense
of playfulness and joyfulness -
13:57 - 14:00and, I would say, nakedness,
-
14:00 - 14:02that has made the Tarahumara
-
14:02 - 14:04one of the healthiest and serene
cultures in our time. -
14:05 - 14:07So what's the benefit? So what?
-
14:07 - 14:10So you burn off the Häagen-Dazs
from the night before. -
14:10 - 14:12But maybe there's another
benefit there as well. -
14:12 - 14:15Without getting too extreme about this,
-
14:15 - 14:20imagine a world where everybody
could go out the door -
14:20 - 14:22and engage in the kind of exercise
-
14:22 - 14:25that's going to make them
more relaxed, more serene, -
14:25 - 14:26more healthy,
-
14:26 - 14:28burn off stress --
-
14:28 - 14:31where you don't come back into your office
a raging maniac anymore, -
14:31 - 14:33or go home with a lot of stress
on top of you again. -
14:33 - 14:36Maybe there's something
between what we are today -
14:36 - 14:38and what the Tarahumara have always been.
-
14:38 - 14:41I don't say let's go back
to the Copper Canyons -
14:41 - 14:45and live on corn and maize,
which is the Tarahumara's preferred diet, -
14:46 - 14:48but maybe there's somewhere in between.
-
14:48 - 14:49And if we find that thing,
-
14:49 - 14:52maybe there is a big fat
Nobel Prize out there. -
14:52 - 14:57Because if somebody could find a way
to restore that natural ability -
14:57 - 14:59that we all enjoyed
for most of our existence -
14:59 - 15:01up until the 1970s or so,
-
15:01 - 15:06the benefits -- social and physical
and political and mental -- -
15:06 - 15:07could be astounding.
-
15:07 - 15:12What I've been seeing today
is there is a growing subculture -
15:12 - 15:14of barefoot runners,
people who've gotten rid of their shoes. -
15:14 - 15:16And what they have found uniformly is,
-
15:16 - 15:19you get rid of the shoes,
you get rid of the stress, -
15:19 - 15:21you get rid of the injuries
and the ailments. -
15:21 - 15:24And what you find is something
the Tarahumara have known -
15:24 - 15:25for a very long time:
-
15:25 - 15:27that this can be a whole lot of fun.
-
15:29 - 15:31I've experienced it personally myself.
-
15:31 - 15:34I was injured all my life; then
in my early 40s, I got rid of my shoes -
15:34 - 15:37and my running ailments
have gone away, too. -
15:37 - 15:39So hopefully it's something
we can all benefit from. -
15:39 - 15:41I appreciate your listening to this story.
-
15:41 - 15:42Thanks very much.
-
15:43 - 15:45(Applause)
- Title:
- Are we born to run? | Christopher McDougall | TEDxPennQuarter
- Description:
-
Christopher McDougall explores the mysteries of the human desire to run. How did running help early humans survive -- and what urges from our ancient ancestors spur us on today? In this talk, McDougall tells the story of the marathoner with a heart of gold, the unlikely ultra-runner, and the hidden tribe in Mexico that runs to live.
This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx
- Video Language:
- English
- Team:
closed TED
- Project:
- TEDxTalks
- Duration:
- 15:53
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Ivana Korom edited English subtitles for Are we born to run? | Christopher McDougall | TEDxPennQuarter | |
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TED Translators admin edited English subtitles for Are we born to run? | Christopher McDougall | TEDxPennQuarter | |
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TED Translators admin edited English subtitles for Are we born to run? | Christopher McDougall | TEDxPennQuarter | |
![]() |
TED Translators admin edited English subtitles for Are we born to run? | Christopher McDougall | TEDxPennQuarter |