Hi, I'm Lindsay.

And I'm Marshall. Welcome to Tumble, the show where we explore stories of science discovery.

Today, we're talking about the end of dinosaurs.

You mean we're going to talk about how dinosaurs went extinct?

No, we're going to talk about the rear ends of dinosaurs.

I'm talking dinosaur butts.

We're going to find out how scientists stumbled upon the

first ever known dinosaur butt fossil, and then we're going to take a look inside.

Today's question comes from Tumble listener Ernie.

It's a little bit silly.

My name is Ernie.

My age is seven.

And my question is, do dinosaurs sniff each other's butts?

That's a great question.

So were dinosaurs sniffing each other's rear ends just like dogs at the dog park?

Did they also circle three times before they lay down?

My question is, how would scientists figure it out?

And Ernie had one idea.

I think they use sniff prints.

A sniff print?

Is that like when maybe they sniff each other's butts in a bit of mud and it gets preserved?

Like a dinosaur footprint?

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