This is a passenger announcement. You can now book your train on Uber and get 10% back in credits to spend on Uber eats.

So you can order your own fries instead of eating everyone else's.

Trains, now on Uber. T's and C's Science. I'm Suzanne Bard.

In North America, fossils of duck-bill dinosaurs are abundant, so abundant that paleontologists sometimes

ignore them in search of more exciting species, like T-Rex or Triceratops. They were so common we often wouldn't collect them

and just left them out in the field. University of Bath, evolutionary biologist Nick Longerich.

But Duck Bells had never been found in Africa. So Longrich did a double take when he was

visiting the Natural History Museum of Marrakesh in Morocco and came across the 66 million-year-old jawbone of a previously undocumented

duckbill species.

I instantly knew what it was and I just couldn't figure out what it was doing there.

Its presence in North Africa was problematic because during the late Cretaceous period,

the planet was warmer, which means sea levels were higher.

Africa was isolated from all the other continents by water and there didn't seem to be any way

that they could get there.

Unless perhaps, duckbill swam hundreds of miles across open ocean from what is now Europe.

It's not as far-fetched as it might sound.

In fact, paleontologists once thought Duckbill dinosaurs were aquatic,

but that theory eventually fell out of favor.

Nonetheless, there's evidence that duckbill's were well adapted for swimming.

They had these really big powerful hind limbs, great big feet,

they've got a long deep tail that they could have used for sculling. So they might have been pretty good swimmers.

Plus, other animal species have been known to cross oceans, albeit rarely.

...