ABC News
A scientist in southern Chile believes he's found the world's oldest tree, a Patagonian cypress he says is over 5,000 years old -- but not everyone is ready to hand the record over yet. Jonathan Barichivich, a scientist who has studied the tree, named the Alerce Milenario, for two years, told the journal Science that his research proves the 100-foot tall, 13-foot wide tree is the world's oldest. Adam Millward, managing editor at Guinness World Records, told ABC News that he has spoken with the organization's dendrochronology expert about the new findings, and the Patagonian cypress has already been deemed the world's second-oldest species, so there is "no denying its longevity potential."