One discovery was that wild Bonobos often walk bidpedally.

Walking upright, we are told, is the threshold of what made us human.

Clearly, the chimpanzee has a little bit harder time of walking.

What's more, they are able to walk upright for long distances.

They're comical, they walk upright, and, of course, they're diligent.

And yet, for the four million years humans have been walking upright, the act is essentially unchanged.

We were able to tell that she belonged to the human family tree because the legs, the foot, and some features clearly showed that she walked upright, and upright walking is a hallmark in humanity.

Here you can't find anybody to compare it with, because we're the only animal that walks upright on two legs.

And until 30,000 years ago, at least three upright walking apes shared the planet Earth.

Yeah. Helmick! Get everybody up to the Jeep!

And second, she tells us that she walked upright, but had some adaptation for tree climbing.

Straight ahead.

It's up there with opposable thumbs and standing upright and language as one of the things that got our species out of the trees and into the shopping mall.

When they went, they went in their four directions they didn't turn when they went.

When they went, they went in their four directions they didn't turn when they went.

When they went, they went upon their four sides and they turned not when they went.

When they went, they went upon their four sides and they turned not when they went.

No, open it... and keep right on goin'.

We're one species out of approximately, or let's say, at least 16 upright walking apes that have existed over the past six to eight million years.

It stands up, it walks very impressive.

their wings were joined one to another they didn't turn when they went each one went straight forward.

their wings were joined one to another they didn't turn when they went each one went straight forward.

Their wings were joined one to another they turned not when they went they went every one straight forward.

Their wings were joined one to another they turned not when they went they went every one straight forward.

who forsake the paths of uprightness, to walk in the ways of darkness

who forsake the paths of uprightness, to walk in the ways of darkness

Who leave the paths of uprightness, to walk in the ways of darkness

Who leave the paths of uprightness, to walk in the ways of darkness

If I take 30 steps linearly one, two, three, four, five I get to 30.

Oh, yes, let's walk and walk until we're dead tired.

Keep walking straight ahead.

Right down the street a piece.

Straight up the street.

You'll see a big cypress over on your left about half a mile.

Straight on?

Go straight... and then go straight again... and from there turn around... and go straight and there it is.

But as far as we know, we're the only upright walking ape that exists on planet Earth today, except for the bonobos.

He said, You just start walking east get out of your car and just start walking east.

Go straight on, ma'am.

Turn left, then straight ahead.

Morning. You're to go right in.

Straight on.

he led them also by a straight way, that they might go to a city to live in.

I have taught you in the way of wisdom. I have led you in straight paths.

He who walks blamelessly walks surely, but he who perverts his ways will be found out.