Name: Origins of agriculture | World History | Khan Academy
Uploaded: 2019-04-09T07:48:35.000Z
Duration: 11 min 27 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...

- [Sal] This timeline
here covers 200,000 years,

from 200,000 years into
the past, to the present.

To-infinitive

And just to get a sense
of the scale of this,

that would be roughly
here on the timeline.

If I were to say, when
were the pyramids built?

That would be roughly
there on the timeline.

So by human standards this is
a very long period of time.

And I didn't choose this
time span arbitrarily.

200,000 years is about how long we believe

anatomically modern humans
have been on our planet,

Now the reason why I
show these stone tools

is because the ages, the
periods, of modern humanity,

that have been found
in archaeological digs.

So most of even pre-human,
or near pre-human,

has been the Paleolithic
period, or old stone age.

The old stone age is the
great bulk of human history.

that comes about 15,000, 20,000 years ago.

the stones have a much more
polished appearance to them.

And so that period from
about 10,000 years,

starting with about 10,000, 15,000 years,

depending on what part
of the world you look at,

And so you can see the last ice age ended

about these Paleolithic,
Neolithic, and the ice ages,

going up until about
10,000 or 15,000 years ago,

They would have to chase the
game wherever it might be,

some sources of fish where
they might be able to do

But they would have
done hunting like this.

It probably was eating a
lot of things like insects,

But then around 10,000
or 15,000 years ago,

Instead of saying, let's
just follow the game

let's actually domesticate these animals.

Let's take some of them,
start breeding them

so they're more suitable
for human consumption,

so that they are easier to
raise, maybe more robust,

and we will raise them for milk, for meat.

Instead of saying, okay let's just gather

those berries there where
it happens to emerge,

And on a very predictable
way, be able to harvest them,

and so be able to have a
more predictable food supply.

Both of these things allowed human beings

to start to settle down, to
have a more sedentary life.

And that is what we estimate
the world population was

around the time of the last
ice age, or shortly afterwards.

And that's because a tribe
of 100 hunter gatherers

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Origins of agriculture | World History | Khan Academy

profound

period

evidence

ancient