Page 18 - Science Focus (Issue 012)
P. 18
The Physics of Poop :
Why It Matters By David Iu 憪?曀?
Pooping might be a rather unsavory built a mathematical model of the duration of
defecation. The intrepid scientists literally took the
subject to discuss. Yet, study of feces could often matter into their hands ??Kaminski and LaMarca
provide us with valuable information about one's filmed animals defecating and hand-picked feces
health. Many gastro-intestinal diseases, like irritable from 34 mammalian species at Zoo Atlanta.
bowel syndrome and gastrointestinal infections,
are manifest in abnormal size, shape, color or The ?oop-analysis??yielded intriguing results.
texture of excrement. They affect millions of people Through measuring the density of the feces
worldwide, and cost billions of dollars annually [1]. collected, the scientists found that the feces
could be separated into two classes: ?inkers??and
Fluid dynamicist Professor David Hu of Georgia ?loaters?? ?inkers?? denser than water, are usually
Institute of Technology and his PhD student Patricia from carnivores like tigers and lions. ?loaters?? on
Yang joined hands with colorectal surgeon Daniel the other hand, are usually from herbivores like
Chu, and the then undergraduates Candice elephants.
Kaminski and Morgan LaMarca to dive into the
science of pooping. The research group set out Despite their wide range of body sizes, the
to look into the size, density, viscosity, smell and majority of mammals share a stunning consistency
the duration of poop across different species, and
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