To not care as a negative dismissal is attested from mid-13c. Phrase couldn't care less is from 1946; could care less in the same sense (with an understood negative) is from 1966. Care also figures in many similies of indifference in the form don't care a _____, with the blank filled by fig, pin, button, cent, straw, rush, point, farthing, snap, etc., etc.
Beryllium metal is used in the aerospace and defense industries to make lightweight precision instruments. The mirrors of the Spitzer Space Telescope and the James Webb Space Telescope (JWST), which is scheduled for launch in 2018, are made of beryllium.
The atomic number of beryllium is four, and it is indicated by the symbol Be on the periodic table of elements. It is the lightest of the alkaline earth elements, and appears in a rigid, steely gray form when it is pure. The element is able to resist corrosion rather well, and it also has a very high melting point.