A rat believed to be extinct for 11 million years, a spider with a foot-long legspan, and a hot pink cyanide-producing "dragon millipede" are among the thousand newly discovered species in the largely unexplored Mekong Delta region. The region, including parts of Vietnam and five other countries, is home to 1,068 species found between 1997 and 2007, according to a World Wildlife Fund report released this week. The Fund dubbed the Mekong a "biological treasure trove." The organization's report "First Contact in the Greater Mekong" says 519 plants, 279 fish, 88 frogs, 88 spiders, 46 lizards, 22 snakes, 15 mammals, four birds, four turtles, two salamanders and a toad were found. Scientists are still trying to determine if they have uncovered thousands of new invertebrate species. (Via CNN )