The Paraná River stretches through the heart of central South America, arising in Brazil and extending over 3,000 miles through Paraguay and Argentina. The continent’s second-longest river behind the ...

Last week, researchers spotted a giant river otter in the wilds of Argentina for the first time since the 1980s when the species was declared locally extinct, reports Graeme Green for the Guardian.

Giant river otters, or Pteronura brasiliensis, are the world’s largest otters, reaching almost 6 feet long and weighing up to 72 pounds, Rewilding Argentina said in a news release.