How can we start to come close to animals that lived hundreds of millions of years ago? 

Dinosaurs 
[Jack Horner] 
Dinosaurs 
[Bill Nye] 
Dinosaurs 
Di-Di-Dinosaurs 

[Dallas Campbell] 
Dinosaurs weren't just giant lizards 
But a truly unique kind of reptile 

[Narrator 1] 
Dinosaurs roamed 
For more than 150 million years 
Dinosaurs roamed 
In amazing shapes and sizes 

Very few left evidence of their existence 
And those bones never cease to fascinate us 

[Roberts] 
The more we find 
The more complete our understanding 
Utterly awe-inspiring 
The world of the dinosaurs 

[Campbell] 
There are always new discoveries out there 
Waiting to be found 

[Narrator 2] 
Tyrannosaurus, the largest flesh eater 
The world has ever seen 
Dinosaurs - all the dinosaurs- 
Followed a well trod trail to oblivion 

[Narrator 1] 
Rock layers span the age of dinosaurs 
The deeper the layer, the older the rock 

At the top - rock from the Cretaceous 
Below that, the Jurassic 
And near the bottom, red Triassic badlands 
When dinosaurs first appeared 

(dino breakdown) 

[Nye] 
65 million years ago 
[Nigel Marvin] 
A meteorite smashed into the Earth 
[Nye] 
Hurtling toward our planet 
At a hundred thousand kilometers a second 

[Roberts] 
If we'd never found their bones, 
We wouldn't ever have known 
These ancient animals ever existed