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Star trails, one of which is Hamal, via H. Raab on Flickr.
These are star trails, and one of the brightest trails here is Alpha Arietis, or Hamal. To learn which one, click here, then click on the image you find. This neat image is by Herb Raab on Flickr. Click here to expand image.
Matt Daniel's WeatherGlobe
Major cold, snow, and even ice for a large part of the U.S.
Blogus scientificus by Alex Reshanov
Babies' weak immune systems may benefit them
Earth Trekker by Deanna Conners
How to spot the International Space Station
This Date in Science by Elizabeth Howell
This date in science: E=mc2