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William
15-05-2012, 1:51pm
Another from a site I visit daily , This is just a look and read

http://apod.nasa.gov/apod/ap120515.html
ameerat42
15-05-2012, 7:05pm
Whew! What a dry spell. Ever wonder what 60% of the earth's mantle is made of? Breathe (somewhat easy): oxygen.
Am.(Gasp.)