Sea Turtle Decline

** HOLD FOR STORY ** In this photo provided by Joel Schumacher, scientists in a research boat pursue a Pacific leatherback turtle in the Pacific Ocean off California in September 2016. All seven distinct populations of leatherbacks in the world are troubled, but a new study shows an 80% population drop in just 30 years for one extraordinary sub-group that migrates 7,000 miles across the Pacific Ocean to feed on jellyfish in cold waters off California. Scientists say international fishing and the harvest of eggs from nesting beaches in the western Pacific are to blame. (Joel Schumacher via AP)