firn

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Flower. Fruit tree. Cherry. Cherry tree. Cherry blossom. Spring. Close-up of cherry blossoms in bloom.

The Perils of an Early Spring

Lightning over the outskirts of Oradea, Rom., during the thunderstorm of August 17, 2005.

16 Questions About Earth’s Atmsophere and Weather Answered

Lightning over a farm field. Weather electricity thunderstorm light energy tree

Can Lightning Strike the Same Place Twice?

Glacier off coast of Argentina, South America. (glacial; snow; ice; blue ice; melting glacier)

What’s the Difference Between a Glacier and an Ice Floe?

Kansas tornado over field. (twister, strom, weather, clouds)

How Do Tornadoes Form?

Discover

A tornado in rural Iowa sweeps dangerously near a farm. Weather storm

Why Does the United States Have More Tornadoes than Any Other Country?

Abstract vector hi speed internet technology background

History of Technology Timeline

Martin Luther King, Jr.

Why We Celebrate MLK Day

jeans, denim, pants, clothing

Why Do We Say “A Pair of Pants”?

Washington, D.C. locator map.

What State Is Washington, D.C. In?

Hemp (Cannabis sativa).

9 Mind-Altering Plants

United States Presidential Election of 2012. Mitt Romney. Official portrait of President Barack Obama in the Oval Office, Dec. 6, 2012 after his reelection Nov. 6, 2012. Official portrait Obama

10 Democrats Who Made History

firn: Media

geology

Images

firn

firn

Scanning electron micrograph of firn from South Cascade Glacier, Alaska, at 80x magnification.

Electron and Confocal Microscopy Laboratory, Agricultural Research Service, U. S. Department of Agriculture

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