A SolarCity employee installs a solar panel on the roof of a home in Los Angeles in 2014. California's utilities want to pay new solar customers less for their extra electricity and to add new monthly fees. Bloomberg/Bloomberg via Getty Images hide caption
Iranian shopkeepers in the main bazaar in the capital, Tehran, in September. Iranians are eager for economic sanctions to be lifted and have been moving quickly to meet their obligations under a nuclear deal, according to analysts monitoring the agreement. Atta Kenare/AFP/Getty Images hide caption
A SolarCity employee installs a solar panel on the roof of a home in Los Angeles in 2014. California's utilities want to pay new solar customers less for their extra electricity and to add new monthly fees. Bloomberg/Bloomberg via Getty Images hide caption
Astrophysicist Richard Gaitskell, from Brown University, leads a team hunting particles of dark matter about a mile beneath Earth's surface. No luck so far, but Gaitskell is still hopeful. Chet Brokaw/AP hide caption
An employee drags a palette of recently returned goods through the Optoro warehouse so they can be processed. Dianna Douglas/NPR hide caption
Amanda Saab cracked jokes, showed her creative side and even cooked bacon (which she didn't eat) during her time as a contestant on MasterChef. Greg Gayne/FOX hide caption
Nick Hodges and Charlotte Wheelock, on a recent visit with StoryCorps. StoryCorps hide caption
A farmer in Ethiopia, in the grips of its worst drought in decades. Thomas Imo/Photothek via Getty Images hide caption