Photo Researchers ftp March 2011

Compact Flash card. Compact Flash card by SunDisk with the European Waste Electrical and Electronic Equipment (WEEE) label and the CE mark. Made in Ch...

Newton's rings is an interference pattern caused by reflection of light between two surfaces that are not exactly parallel to each other. The pattern...

A wire carrying electric current generates a magnetic field around it. When a compass is placed near the wire and the current is not flowing, the need...

A wire carrying electric current generates a magnetic field around it. When a compass is placed near the wire and the current is not flowing, the need...

Demonstration of Biot-Savart law. A wire carrying electric current generates a magnetic field around it. For a long straight wire the magnetic field l...

Demonstration of Biot-Savart law. A wire carrying electric current generates magnetic field around it. For a long straight wire the magnetic field lin...

Demonstration of Biot-Savart law. A wire carrying electric current generates magnetic field around it. For a long straight wire the magnetic field lin...

Demonstration of Biot-Savart law .A wire carrying electric current generates magnetic field around it. For a long straight wire the magnetic field lin...

A wire carrying electric current generates a magnetic field around it. When a compass is placed near the wire and the current is not flowing, the need...

A wire carrying electric current generates a magnetic field around it. When a compass is placed near the wire and the current is not flowing, the need...

Shown here is a simple electrical circuit consisting of a battery, a switch and a lamp. With the switch in the on position, the circuit is closed and...

Shown here is a simple electrical circuit consisting of a battery, a switch and a lamp. With the switch in the off position, the circuit is open and t...

A wire carrying electric current generates a magnetic field around it. When a compass is placed near the wire and the current is not flowing, the need...

A wire carrying electric current generates a magnetic field around it. When a compass is placed near the wire and the current is not flowing, the need...

Farmland near the village of Ainhoa, Pyrenees-Atlantiques, French Basque Country, Southwest France.

Sheep graze on rural farmland in the Baztan Valley of the Navarre region of northern Spain.

Cattle on rural farmland near the town of Solares, Cantabria, Spain.

Cattle on rural farmland near the town of Solares, Cantabria, Spain.

A model of Tyrannosaurus rex from the late Cretaceous period. This carnivorous dinosaur reached lengths of 40 feet, weighed up to 6 tons, and could r...

A model of a baby Tyrannosaurus rex from the late Cretaceous period. This carnivorous dinosaur, when full-grown, reached lengths of 40 feet, weighed...

Clouds.

TIger, (Panthera tigris).

Grizzly bear, (Ursus arctos horribilis).

TIger, (Panthera tigris).

Gila Woodpecker, (Melanerpes uropygialis); Saguaro National Park, Arizona.

Lake Mead National Recreation Area; Nevada.

Dall Sheep, (Ovis dalli); Denali National Park, Alaska.

An infant polar bear, (Ursus maritimus); -sticking its head into a hole in the snow.

Mountain Goat, (Oreamnos americanus); Glacier National Park, Montana.

Mountain Goat, (Oreamnos americanus); Glacier National Park, Montana.

Hoary Marmot, (Marmota caligata); Glacier National Park, Montana.

Caribou bulls, (Rangifer tarandus), fighting in front of Mt. Mckinley, Alaska.

A prairie in Saskatchewan, Canada.

A prairie in Saskatchewan, Canada.

Lighting over a prairie in Saskatchewan, Canada.

Dall Sheep rams, (Ovis dalli); Denali National Park, Alaska.

A lightning bolt strikes in eastern Wyoming during a storm.

Lighting at the Great Sand Hills Ecological Reserve; Saskatchewan, Canada.

Great Sand Hills Ecological Reserve; Saskatchewan, Canada.

A rainbow appears over a prairie in Saskatchewan, Canada.

Horse, (Equus ferus caballus).

Moose, (alces alces); by a lake in Alaska.

Moose, (alces alces); by a lake in Alaska.

A charging muskox, (Ovibos moschatos); Yukon Wildlife Preserve, Canada.

Wood Bison, (Bison bison athabascae); Alaska Wildlife Conservation Center.

Glaucous-winged gull, (Larus glaucescens), with chick; Alaska.

Brown Bear, (Ursus arctos); Alaska Wildlife Conservation Center; Alaska.

Wild Goose Island, at the center of St. Mary Lake, in Glacier National Park, Montana.

Mountain wildflowers; Glacier National Park, Montana.

Plains Bison, (Bison bison bison); Elk Island National Park, Alberta, Canada.