With elevations ranging from 5000 feet with a Chihuahuan Desert ecosystem to mixed conifers at 9000 feet, the South Mogollon Rim is comprised of many diverse species of plants and animals from ducks to lizards.

With elevations ranging from 5000 feet with a Chihuahuan Desert ecosystem to mixed conifers at 9000 feet, the South Mogollon Rim is comprised of many diverse species of plants and animals from ducks to lizards.

With elevations ranging from 5000 feet with a Chihuahuan Desert ecosystem to mixed conifers at 9000 feet, the South Mogollon Rim is comprised of many diverse species of plants and animals from ducks to lizards.

With elevations ranging from 5000 feet with a Chihuahuan Desert ecosystem to mixed conifers at 9000 feet, the South Mogollon Rim is comprised of many diverse species of plants and animals from ducks to lizards.

With elevations ranging from 5000 feet with a Chihuahuan Desert ecosystem to mixed conifers at 9000 feet, the South Mogollon Rim is comprised of many diverse species of plants and animals from ducks to lizards.

With elevations ranging from 5000 feet with a Chihuahuan Desert ecosystem to mixed conifers at 9000 feet, the South Mogollon Rim is comprised of many diverse species of plants and animals from ducks to lizards.

Using wind tunnels, lasers and high-speed cameras, University of Montana researcher Ken Dial studies ground birds for clues about the origins and mechanics of flight.

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Most pet owners talk to their animals at one time or another, and some do every day. But how much do our pets actually understand? Is their perception anything like ours? These are the questions that fascinate Irene Pepperberg and she's looking for answers from the animals themselves, specifically -- African Grey Parrots. The Harvard psychology professor is a bit like the character Dr. Doolittle because she's been talking to parrots for decades. With help from the National Science...

Yosemite is one of the busiest tourist destinations in America, millions of people travel here during the summer to see the few last remaining gigantic trees. But on the southern border lies some trees that most people didn't even know existed. Here we discovered a Sugar Pine that had a trunk circumference of 19'.

Yosemite is one of the busiest tourist destinations in America, millions of people travel here during the summer to see the few last remaining gigantic trees. But on the southern border lies some trees that most people didn't even know existed. Here we discovered a Sugar Pine that had a trunk circumference of 19'.