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 a Group 2 (IIA) element. It is a metal and has a high melting point. At ordinary temperatures, beryllium resists oxidation in air. Beryllium compounds are very toxic.Its ability to scratch glass is probably due to the formation of a thin layer of the oxide.n fact, compounds containing beryllium are poisonous. Beryllium is found in a number of minerals. The most important minerals are beryl, [Be 3 Al 2 (SiO 3) 6 ], which is often found as hexagonal prisms, and bertrandite [4BeO.2SiO 2 .H 2 O].