TAHOE/TRUCKEE - The hairiest experience Chuck Langrill ever had while he was out 'Sasquatching' in the Sierra Nevada took place one night as he followed a riverbed into the mountains.Searching for signs of the elusive bigfoot in the soft mud, he heard whooping vocalizations coming from both sides of a nearby valley. So like any good Sasquatch searcher, Langrill sat down and waited as the sounds got closer."I was sitting there with my camera in my hand. I just had a feeling something was going to happen. Then the trees start to move and I see this black, furry thing," Langrill said.The shape that emerged turned out to be nothing more exotic than a resident black bear, but Langrill said he's convinced he was surrounded by a group of Sasquatches that night. The whooping sounded just like a primate's cry, he said. IN SEARCH OF THE ELUSIVE BEASTLangrill, who runs the website Sierra Tahoe Bigfoot Research (sierratahoebigfoot.com), didn't catch a glimpse of a bigfoot on that trip. In fact, during the four years since he founded the site that's dedicated to research of the giant primate and its habitat in Tahoe and the Sierra Nevada, he's never seen one.But that hasn't damped his confidence in the species' existence."There are just so many sightings in the Tahoe area, and they're credible people who have seen them," Langrill said. "Everything I've witnessed at night, no one can tell me they're not real. And all these people who have seen them, they're obsessed."California is second only to Washington state when it comes to reported bigfoot sightings, according to the Bigfoot Field Researchers Organization. More than 420 Californians have posted alleged sightings online, 41 of which occurred in Placer, Nevada and El Dorado counties.But in an arena overrun by amateur researchers, the anthropological has morphed into the mythological. Photos of the eight-foot primate are too blurred to make out, bones decompose rapidly or are scavenged too quickly to find again, and some sightings turn out to be people masquerading in hairy ape suites."Probably what it's going to take is someone is going to have to capture one. I don't think a picture is going to do it," Langrill said.Even a recent DNA study led by researcher Melba Ketchum that purports to confirm the existence of the large primate has already lost some credibility in the ensuing "soap opera," Langrill said. Though the study hasn't been published, findings suggest that the animal emerged about 1,500 years ago as a hybrid species related to modern Homo sapiens and another unknown primate.The report, leaked through Facebook, didn't follow the traditional methods of academic dissemination and it's unclear where the DNA came from. According to Langrill, the sample came from a piece of meat, called "The Steak," that was cut off a Sasquatch killed in the Sierra Nevada, but he admits there are many ways it could have been tainted. Read on...