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Today's Brain Teaser #11 (17JUN2013)
What expression is represented by this rebus?

Blood viscosity = 250 x 10 (to the power of minus 3) Pa.s
COMPARED TO
H2O viscosity = 1.0 x 10 (to the power of minus 3) Pa.s
COMPARED TO
H2O viscosity = 1.0 x 10 (to the power of minus 3) Pa.s