At a March 3 Republican presidential primary debate, candidates (from left) Marco Rubio, Donald Trump, Ted Cruz and John Kasich appear on stage at Fox Theatre in Detroit. Rubio later dropped out of the race.
Diane, a 4-year-old chimpanzee, relaxes in the trees at the Chimp Haven sanctuary in Keithville, La., on Aug. 25, 2014. She is one of many chimps who have been moved here from the New Iberia Research Center in Lafayette, La.
Activists hold a banner reading "standing and decided for climate" during a demonstration near the Eiffel Tower in Paris on Dec. 12, 2015, during the United Nations Climate Change Conference.
French Foreign Minister and President of the COP21 Laurent Fabius (center) gives a thumbs up while U.N. Secretary-General Ban Ki-moon (left) and French President Francois Hollande applaud after the final meeting of the U.N. conference on climate change in Le Bourget, France, on Saturday.
The "Green Moms" group displays painted baby tubs during a June 2013 protest in Quezon, Philippines, showing opposition to the genetically modified rice variety "golden rice," which proponents promote as a solution to Vitamin A deficiency.
A man walks through hundreds of pairs of shoes displayed in Paris as part of a rally called "Paris sets off for climate" on Sunday, Nov. 29. More than 140 world leaders are gathering around Paris for high-stakes climate talks this week.
Indian athlete Dutee Chand has been fighting the ban for "hyperandrogenism," or the presence of high levels of testosterone in the body, that has made her ineligible to compete as a sprinter.