ooh! i think i saw this movie!
http://yourtattoosucks.com/wp-content/uploads/2010/02/crack-kills.jpg
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The structure forming the shell of a chamber is a box large enough to easily accommodate the organism being used as a subject. (Commonly used model organisms include rodents—usually lab rats—pigeons, and primates). It is often sound-proof and light-proof to avoid distracting stimuli.
