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 mostly used as an alloy when combined with elements like copper, nickel and aluminum, it forms materials that are lighter, tougher and more corrosion resistant than similar alloys.he fourth element on the periodic table, beryllium is certainly less well known than some of its single-digit neighbours like oxygen and helium. But this obscure element has many high tech fans and is poised to become an essential material of the future.