Pretty much any amino acid arrangement can be hydrolyzed, including those of the recyclable that dares not speak its name. A four-person crew will, over the course of three years, generate somewhere in the neighborhood of a thousand pounds of feces. In the ominous words of sixties space nutritionist Emil Mrak, "The possibility of reuse must be considered." Sometime
( Mary Roach )
[ Packing for Mars: The Curious ]
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