Trilobites: Gray Ghosts, the Last Caribou in the Lower 48 States, Are ‘Functionally Extinct’ The herd of southern mountain caribou, the last in the contiguous United States, has dwindled to three animals. Conservationists attribute the decline to development in Canada. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:90 New Cases of Measles Reported as Outbreak Continues at Record PaceAsteroid danger: NASA scientist explains 'current HAZARD' and 'LARGE ONES' threatFirst WORKING 3D printed heart CREATED and could save MILLIONS of livesLife on Mars: NASA's Curiosity rover digs up clay samples - Is it PROOF of water on Mars?Humans to be connected to THE CLOUD within ‘decades’ giving instant access to EVERYTHINGCold weather to grip WORLD as solar minimum to DEEPEN, NASA says