What I can imagine happening is we feel geopolitically threatened and we say we got to put astronauts on Mars.

And NASA says, oh my gosh, we don't have a spaceship. Let's look around. And Elon says, I have a spaceship, okay?

And so then the United States pays Elon to ride his spaceship to Mars.

You had a little disagreement about the science

of trans athletes in women's...

Imagine the future of sports

does not distinguish sex

and sorts people by hormone ratios.

You get a hormone test.

You're in this range

and then you compete against other people

with the same range of hormones.

That's ridiculous.

Neil, that is ridiculous. No, it's not. I'll tell you why it's not ridiculous. You're going to give every single thing in America in totality. It's one of the fattest countries in the developed world. It just eats. And by the way, we're in no position to lecture you over here either. Your fishing chips is a whole other... With mushy bees. Bath and oil right there.

The world's most famous astrophysicist, Neil deGrasse Tyson, made a lively appearance

on Bill Mars show recently.

His answer to a particular question sent him on a cosmic collision course with the world's

most famous engineer.

How soon could Elon Musk realistically send humans to Mars?

Oh, another good question.

I have strong views on that.

My read of the history of space exploration is such that we do big expensive things

...