Odette Mina, a third-year Ph.D. student studying agricultural and biological engineering, downloads data onto her computer at a pond at Penn State’s Living Filter.

Teenage mutant ninja tadpoles?

Heather Gall sprays a few sprits of tick spray around her face and arms, pulls on her baby blue waterproof waders and adjusts the straps to fit her petite frame before wading knee-deep into a pond at one of Penn State's Living Filter spray fields.