If you wonder why you shouldn't eat silica, put the following 2 true statements together:
1) Silica absorbs water
2) The human body is made up of primarily water
Anthrax can be combined with silica to dry the anthrax spores out, making them linger in the air longer. This was what was done for the anthrax mailings to CBS, NBC, Congress, etc.
Sil"i*ca (?), n. [NL., from L. silex, silics, a flint.] Chem.
Silicon dioxide, SiO. It constitutes ordinary quartz (also opal and tridymite), and is artifically prepared as a very fine, white, tasteless, inodorous powder.
© Webster 1913.
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