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1:53
What is the chance a new flu strain will jump from birds to people?
2:36
The basic building blocks for life are made of just six elements.
0:44
Satellites use portions of the electromagnetic spectrum that are invisible to our eyes.
2:09
An excerpt from "Treasures of the Earth: Metals"
1:36
It’s the tough Manhattan schist rock that’s allowed the city’s skyscrapers to soar.
1:05
When the sand is swept away the stromatolites are vulnerable to the seaweeds.
1:23
We’re looking for one of the oldest organisms on our planet.
1:38
14-foot-long fish in Kansas? Name me a living 14-foot fish.
1:10
These are the North Dakota Badlands
thousands of square miles of arid gullies and buttes.
2:00
Tyler Lyson is a paleontologist who’s been digging up dinosaur fossils in these badlands.
0:54
340 million years ago, a warm shallow sea covered all of the American Southwest.
1:15
This is Zion Canyon. Its 2000-foot sandstone cliffs are among the tallest of their kind.
