So let's say those are the germ cells.

The penis is one of the male reproductive organs.

Usually through the reproductive organs.

And the germ cells exist as part of your reproductive organs.

No males at all.

And in Europe, there's certain parts of Europe, where we're seeing a four fold increase in certain genital birth defects.

(Laughter) Right?

And very importantly, with the introduction of sexual reproduction that passes on the genome, the rest of the body becomes expendable.

Tropical rainforests arose, sparking new layers of interdependence.

If I talked about other species, they might have 10 chromosomes or they might have 5 chromosomes.

The men and women are different.

Audience Member Her uterus would be torn. Christopher McDougall

And with that... my reproductive and sexual function.

Whether or not which direction they're flipped is completely random, and that's what adds to the variation.

She's a she, and we raise her to be a her.

And in fact, this idea that the cells of the reproductive tract are the only place where the Y functions, has led, in turn, to the notion that the genomes of men and women are, apart from the reproductive tract, functionally, maybe even morally equivalent.

You can have culture without exchange.

In a female, they would be involved in the ovaries.

Over time this produced every one of the billions of species of life on earth.

So let's envision what the system might look like.

How does evolution do cumulative, combinatorial things?

Can't you reason with him?

Can't you reason with him?

So in a male, you have some germ cells, so some of these cells turn into germ cells.

Where everything was displayed in poorly labeled roach proof bins.

Women usually live longer than men.

Women commonly live longer than men.

Women usually live longer than men.

Women generally live longer than men.

Most of the time, it'll break the organism.

So it's only been 20 years that women have been allowed to run the marathon.

But at the time multi celled organisms come online, things start to change.

I checked if the victim was indeed of the male sex.

They developed an artificial coition machine.

My colleagues had thoughtfully put on the wheel where I was supposed to work a very nicely modeled natural man's organs.

It's going to be very challenging to deal with.

And these germ cells, they're the product of mitosis.

Generally speaking, women live longer than men.

Women tend to live longer than men.

And it's not just kids, it's adults too.

Boy, girl, man, woman?

It is said that women live longer than men.

Man And you, you count that she does it right. (Boy

You've got a seven digit number call out any six of them loud and clear.

Really scramble them up this time, please.