Name: Who Was the First Human Ancestor? - Instant Egghead #31
Uploaded: 2021-05-15T15:16:28.000Z
Duration: 2 min 36 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

our ancestors were making  early cave paintings.

About 60,000 years ago,  some were migrating out of Africa.

Even before that, some  of our recent ancestors,

like Homo erectus, were chipping away at stone tools.

we were swinging around in trees like chimps, right?

The idea of humans evolving  from a chimp-like ancestor

has pervaded scientific thought  since the time of Charles Darwin.

And given 6 to 10 million years,  it seems at least plausible

that we could have evolved from wild apes  into our current, refined selves.

we didn't come from chimps  any more than they came from us.

Let's start with the classic  hominid ancestor, Lucy.

She lived about 3.2 million years ago  and she looks

like she could have evolved  from an animal resembling a chimp.

But a newly-described hominin,  nick-named Ardi, is a million years older.

it stands to reason  that she should look more like a chimp.

Although she lived part  of the time in the trees,

she would've padded around  on the palm of her hand

rather than on her knuckles  like chimps do.

So, if our forebearers  didn't look like chimps,

Just last year, scientists discovered  eight fossil bones of a strange foot.

This foot looked  an awful lot like Ardi's foot

and had a sideways pointing big toe  for climbing trees.

The only problem is the owner  lived at the same time as Lucy.

on an entirely separate line from Lucy's and ours.

The short answer is, it's complicated  and we might never know.

Unfortunately, the more fossils we find,  the bushier our family tree becomes.

For Scientific American's Instant Egghead, I'm Katherine Harmon.

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Who Was the First Human Ancestor? - Instant Egghead #31

evidence

evolve

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