Some researchers have begun to question the notion that dolphins are the super-intelligent creatures they've been made out to be. Pavel Golovkin/AP hide caption
dolphins dolphins
Video screen-grab of drone footage of a dolphin stampede off California coast. Dave Anderson/Capt Dave's Dolphin and Whale Safari hide caption
Demonstrators at a rally in Tokyo on August 31 protest against the start of Japan's annual dolphin hunt in Taiji. Yoshikazu Tsuno/AFP/Getty Images hide caption
An Atlantic bottlenose dolphin at the Dolphin Research Center on Grassy Key in Marathon, Fla., in July. Wilfredo Lee/Associated Press hide caption
An elephant at the Emmen, Netherlands, zoo stands at the edge of a ditch in 2009, a day after another elephant fell into the ditch and died. Olaf Kraak/AFP/Getty Images hide caption
Nari, a dolphin bitten by a shark in February 2009, was almost completely healed one month later. Courtesy of Dr. Michael Zasloff hide caption