Welcome to Star Talk, your place in the universe where science and pop culture collide.

Star Talk begins right now.

Welcome to Star Talk Radio, I'm your host, Neil deGrasse Tyson.

I'm an astrophysicist and director of New York City's Hayden Planetarium, right here in New York City,

part of the American Museum of Natural History.

The show you're about to hear is another season four time capsule,

this time featuring your favorite Cosmic Queries episodes.

In Cosmic Queries, my comedian co-host and I grapple with a variety of questions asked by you, our audience.

Based on our poll, your favorite Cosmic Queries were all about dark matter and dark energy.

Who discovered dark matter and I know it wasn't Al Gore.

Ah, sorry Al.

Yeah, he discovered it on the internet.

On the internet.

Yeah, so dark matter was discovered in the 1930s by a dude named Fritz Zwicky.

Not Fritz.

That's totally Fritz.

Oh man, that dude party.

When did he have time to discover dark matter?

That dude was always at a party.

So he was Swiss-born American, I don't know if he was ever naturalized,

but his whole professional career was in America.

And he worked at Caltech in Pasadena, California, the California Institute of Technology.

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