5 otter families found along Seoul’s Han River

Eurasian otters are making a comeback in Seoul’s Han River, decades after the endangered species disappeared from the capital’s stretch of the waterway. A new DNA survey identified 27 otters along the river and its tributaries, up from 15 in a city-commissioned survey four years ago, a state-run institute said Thursday. The National Institute of Biological Resources identified the animals by analyzing DNA from 106 fecal samples collected at 27 locations between January and April. Twenty-one otte