Store
Press
About
Team
Subscribe
Contact

EarthSky

A Clear Voice for Science

Earth
Space
Human World

Blogs
Photos
Videos
FAQs
Science Wire
Today’s Image
Tonight
- Brightest Stars

Search for:

Enjoying EarthSky? Subscribe.

82,409 subscribers and counting ...

By Alex Reshanov in
on Oct 24, 2012

wikipedia

The basic still concept: evaporation on the left, condensation on the right. Image: Wikipedia.

Today's Image

Photo credit: Bertrand Duhamel

Snow geese in front of the moon

Most Popular on EarthSky

Tonight
December 2013 guide to the five visible planets
Tonight
Everything you need to know: Geminid meteor shower
Blogs
Outburst of Andromedid meteors may continue tonight
Blogs
Have we seen the last of Comet ISON?
Tonight
EarthSky’s meteor shower guide for 2013

Featured Blogs

Matt Daniel's WeatherGlobe
U.S. snow and ice in 2013 compared to 2012

Blogus scientificus by Alex Reshanov
Humans aren't top predators, says new report

Earth Trekker by Deanna Conners
Early warning system for abrupt climate impacts

This Date in Science by Elizabeth Howell
This date in science: E=mc²

Content Partners

Store
Press
About
Team
Subscribe
Contact

Privacy Policy © 2013 Earthsky Communications Inc.