Image of a mini-kidney formed in a dish from human induced pluripotent stem cells. Minoru Takasato/Nature hide caption

itoggle caption Minoru Takasato/Nature

The model of a DNA stands on a desk during a press conference to announce the winners of the Nobel Prize in Chemistry 2015 on Wednesday at the Royal Swedish Academy of Sciences in Stockholm. Sweden's Tomas Lindahl, Paul Modrich of the US and Turkish-American Aziz Sancar won the Nobel Chemistry Prize for work on how cells repair damaged DNA. Jonathan Nackstrand/AFP/Getty Images hide caption

itoggle caption Jonathan Nackstrand/AFP/Getty Images

The "Super-Kamiokande" neutrino detector operated by the University of Tokyo's Institute for Cosmic Ray Research helped scientist Takaaki Kajita win a share of the Nobel Prize in Physics, along with Canadian Arthur B. McDonald. Kyodo /Landov hide caption

itoggle caption Kyodo /Landov
Adam Cole/NPR

Modern, domesticated rice comes in a range of colors, usually described as white, red and black. But collectors have never found black grains in more than a thousand samples of wild rice stored in gene banks. Now geneticists have traced this rare grain's origin and spread. Courtesy of Takeshi Ebitani/Takuya Yamaguchi. hide caption

itoggle caption Courtesy of Takeshi Ebitani/Takuya Yamaguchi.