This week held some truly unexpected breakthroughs as scientists in China figured out a way to create brain cells from human urine, and researchers at Rice University and CUNY developed batteries that are fueled by the dye from madder roots.

ENGADGET: Inhabitat's Week in Green: madder root batteries, sun-powered plane and the world's first fiber-optic solar cell

They said the average human bladder holds only six to eight ounces, and the urine would have been vastly diluted.

FORBES: Draining a Reservoir Because a Man Urinated in it

Although the anti-drug policy's enacted in '04 and '05 helped out, many players switch to human growth hormone, which does not show up in a urine test.

NPR: Steroids Report Names 85 Baseball Players