What it says on the package.
Reblogged from nobodysuspectsthebutterfly
photos by mike hollingshead in oklahoma of mammatus clouds, which are formed when air laden with big water droplets is carried to the top of a thunderstorm cloud whose altitude is cold enough to freeze the water droplets. the resulting crystals sink back down towards the earth, collecting at the base of the cloud before they have time to evaporate. mammatus clouds are usually only stable for a few minutes. (see also: previous cloud posts)
Reblogged from chuuface
Solar energy that doesn’t block the view
A team of researchers at Michigan State University has developed a new type of solar concentrator that when placed over a window creates solar energy while allowing people to actually see through the window. It is called a transparent luminescent solar concentrator and can be used on buildings, cell phones and any other device that has a clear surface. And, according to Richard Lunt of MSU’s College of Engineering, the key word is “transparent.”