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.
Beryllium is almost transparent to x-rays, and beryllium foil is used as window material in x-ray and other radiation machines. In nuclear reactors, beryllium metal and beryllium oxide are used to control fission reactions.Beryllium has also been used in the trigger mechanisms for nuclear weapons.Two minerals, bertrandite and beryl, are mined for beryllium, and both are found in association with igneous rocks. All the beryllium currently being mined in the United States comes from the mineral bertrandite.eryllium has also been used in the trigger mechanisms for nuclear weapons. Two minerals, bertrandite and beryl, are mined for beryllium, and both are found in association with igneous rocks. All the beryllium currently being mined in the United States comes from the mineral bertrandite.