Name: Dogs and Humans: A 30,000-Year Friendship (ft. MinuteEarth)
Uploaded: 2017-05-15T14:51:50.000Z
Duration: 3 min 55 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

There’s about 7.4 billion people on Earth today

So exactly where, when, and why did warm-hearted wolves join our pack?

No matter where you sit – siiiiiiit, it’s plain to see that the histories of dogs and

humans are intertwined… maybe like no other two species.

If we take domestication out of the human equation, it’s estimated just 1 or 2 million

And of all those animal alliances, our relationship with dogs is the oldest.

But figuring out why, where, and when domestic dogs first originated is still a bone of contention.

Every continent is home to wild canids – like Africa’s painted dogs or Asia’s doles,

but thanks to genetic research we know modern pups didn’t descend from those local species.

Today’s domestic dogs all trace their DNA back to ancient wolves.

You may have heard that wolves and ancient people were hunting buddies that used teamwork

That’s a nice story, but wolf packs can hunt just fine on their own – and usually

Plus, early humans tended to kill off most carnivorous competition.

It’s most likely that humans didn’t adopt dogs.

Any “wolves gone mild” that were tolerant of humans could have scrounged our scraps.

They didn’t need us, but our leftovers could have made their lives easier.

Today, about 85 percent of domestic dogs still survive on our waste - no matter how many

times we tell them “STAY OUT OF THE TRASH”

But a tame wolf isn’t a dog, and scientists are still trying to figure out when and where

Studying living wolves tells us the line that led to our pups is extinct today, but we can

still find their footprints in modern dog genomes.

Looking at DNA in mitochondria tells us dogs split from their wolf ancestors somewhere

in Europe between 19 and 32 thousand years ago, but whole genomes from dozens of living

dogs put the split somewhere in South Asia around 33,000 years ago.

It’s tough to pin down because dog genes have mixed so much.

Fossils don’t tell the whole story either, because bones alone can’t tell us when the

thing that looked like a wolf started to act like a dog.

But combining the two, fossils and DNA, could give us some hints.

DNA extracted from ancient dog fossils has suggested a new story: the domestication split

happened in two places, at least 12,000 years ago.

And then at some point, Eastern dogs followed people west, and became the dominant ancestor

Dogs became useful herders, sled pullers, and guards – against predators AND neighboring

And in a pinch, they could have served as an emergency food supply.

Dogs probably saved us more times than we can count.

We’re paying them back – pups now have access to insurance, healthcare, some even

have more instagram followers than you and me.

From a wolf mold, we’ve crafted 340 or so dog breeds, even a few weird ones.

It’s hard to believe every domestic dog is still part of the same species, one whose

story is so tightly wound to our own, that we still can’t quite tell where it begins.