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This is CBS Islanderworld. I'm John Bachelorette with Thomas Halliday, a paleontologist and author

writing magically and convincingly of other lands journey through Earth's extinct worlds.

This is before the asteroid, before the death of the dinosaurs, is called the Cretaceous period,

125 million years ago. I learned from Thomas to call dinosaurs knuckle walkers. What does that mean,

Thomas? Knuckle walkers, I suppose what you're talking about, is some of the titanosaurian

sauropods. Yeah, the titanosaurus that was a knuckle walker. Yeah, they picture.

Well, the reason I call them knuckle walkers is because they are a few of their evolution when

they're attaining such large sizes. In order to have this pillar-like limb, one of the things

that titanosaurs in particular do is they lose the bones that are the same as our fingers. They

lose their digibons. Their front feet are essentially just highly modified hand bones. They're

working on the ends of their knuckle. That's what I meant by that word.

Oh, you write that this is the heyday of non-avian dinosaurs. The titanosaurs are 17 meters long,

very large. And these are herbivores. They're reading the prosperity of the Earth. What is

the forest look like at this time? My notes says cypress trees. Yeah, this is a time,

so this is back in the early critatious, this particular cycle, wonderful environment in Lianning

in China. And at this time, flowering plants hadn't got going. So we're not seeing,

or rather, they had begun to exist. The very earliest flowering plants have from this site,

...