"Odin was hand-raised at the zoo. And after he was weaned, his British trainer Lee Munro discovered his remarkable skill: when a lump of meat was thrown into a pool of water, Odin would happily dive in after it. Odin can now be observed in action, at Six Flags Discovery Kingdom Zoo in Vallejo, near San Francisco, in a large pool with glass walls has been constructed at the zoo to allow visitors to watch him gliding through the water with all the grace of a polar bear.... A century ago there were about 100,000 tigers in the wild. Now there are just 2,500 adults, with the Bengal variety almost extinct. Within our lifetimes, zoos might be the only places left to see these animals alive."