♪ Oh lucky pebble you're so lucky ♪ ♪ Which is why I call you lucky pebble ♪ - Tickets!

Tickets, please!

Qianzhousaurus Pond Station.

Oh, boy, are you in for a treat!

- Will someone please tell us what's so great about Qianzhousaurus Pond Station?

- Well, without ruining your mom's surprise, one thing I can tell you is that it's home to lots of Qianzhousauruses.

You know, Buddy, Qianzhousaurus is actually one of your cousins.

They're tyrannosaurs!

- Wow!

Seriously?

- Wait, Mr.

The Conductor, that Qianzhousaurus doesn't look anything like Buddy.

Are you sure they're tyrannosaurs?

- Absolutely, Mr.

The Don.

Remember, animal life is divided into groups, or families.

And within those families, there's a lot of diversity.

So tyrannosaurs are a family of dinosaurs that are all-- both: Theropods!

- Correct-amundo!

And there's lots of different kinds of theropods: Velociraptors, allosaurs, tyrannosaurs.

And the ones with similar features, we group together.

Can anyone see what the tyrannosaurs have in common?

- They've got long legs!

- And gigantic heads.

- And lots of sharp teeth for eating meat!

- That's right!

These tyrannosaurs have similar features, but they have differences too.

- The T. rex is much bigger!

- And the Qianzhousaurus has a really long snout!

- Look!

It's got a bunch of tiny horns on its snout!

Tiny horns are the best kind of horns.

- Mom, is going to meet a Qianzhousaurus your surprise?

- No.

My surprise is different.

- Woo-hoo!

Double surprise!

- Lucky pebble, you've done it again!

[chimes ringing] - Time tunnel!

Time tunnel approaching!

Next stop, Qianzhousaurus Pond Station in the Late Cretaceous!