People aren't the only ones at risk from eating mercury-contaminated fish, since coal-burning power plants have liberally sprinkled the toxic metal across the earth's waters. But it appears that captive dolphins have a little less to worry about in that regard than their wild counterparts.
A new study by researchers from Johns Hopkins University and the National Aquarium in Baltimore found that the aquarium's captive bottlenose dolphins have lower levels of mercury in their bodies than wild dolphins tested off the Atlantic and Gulf coasts of Florida.
