A drawing from Michael Davidson's 2012 patent for "Toothbrush And Method Of Using The Same." Patent 8,108,962/U.S. Patent and Trademark Office hide caption

itoggle caption Patent 8,108,962/U.S. Patent and Trademark Office

Does bell pepper and black tea sound appetizing? A computer may think so. Ryan Smith/NPR hide caption

itoggle caption Ryan Smith/NPR

This photo, taken by NASA's Curiosity rover, shows Mars' Gale Crater, where the rover has taken samples for chemical analysis. Scientists believe that at some point in the very distant past, there was a riverbed here. AP hide caption

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NASA's Mars rover Curiosity cut a wheel scuff mark into a wind-formed ripple at the "Rocknest" site to give researchers a better opportunity to examine the particle-size distribution of the material forming the ripple. NASA/JPL-Caltech hide caption

itoggle caption NASA/JPL-Caltech

Researchers say they have identified traces of ice in craters on Mercury, seen here in this Oct. 8, 2008, image from the Messenger spacecraft. NASA hide caption

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NASA's Mars rover Curiosity dug up five scoops of sand from a patch nicknamed "Rocknest." A suite of instruments called SAM analyzed Martian soil samples, but the findings have not yet been released. NASA/JPL-Caltech hide caption

itoggle caption NASA/JPL-Caltech

A man crosses a flooded street in the wake of Superstorm Sandy on Thursday in Little Ferry, N.J. Surprise coastal surge floods caused by the storm battered Little Ferry, Moonachie and some other towns along the Hackensack River in Bergen County, all areas unaccustomed to flooding. Mike Groll/AP hide caption

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An emergency responder helps residents of Little Ferry, N.J., after their neighborhood was flooded due to Superstorm Sandy. Andrew Burton/Getty Images hide caption

itoggle caption Andrew Burton/Getty Images

Urushiol, the chemical in poison ivy, is also harvested from the Japanese lacquer tree to coat lacquerware. Here, a rash caused by lacquerware that likely was not properly cured. Kenji Kabashima hide caption

itoggle caption Kenji Kabashima