In the world of science, there's supposed to be a reason for everything.

A reason why the sky is blue, a reason why dogs chase bicycles.

There is even somewhere a reason why socks disappear in the washing machine.

However, there is no generally accepted reason why you and I stand on our own two feet,

instead of loping around on all fours the way most animals do.

Over the years, anthropologists have come up with all kinds of different explanations,

but it's hard to think of experiments that might prove anything.

A friend of ours named Scott Carrier decided, however, to do some research on his own.

He sends this report.

And there they go.

What? There they go. What?

There they go.

You see him?

Crossing over there?

No.

Or to the right.

Quite a ways away, in fact.

Way out there.

A couple of years ago, my brother and I went to Wyoming to run down an antelope.

I only see three over there. Well, there were about eight down there.

Yeah.

It was August, and our plan was to chase one animal

...