Someone recently used a chainsaw to slice into Luna, the 1,000-year-old redwood made famous by Julia "Butterfly" Hill. Hill lived in the tree in Northern California for two years to protest old-growth logging, and only came down from her perch last December after striking a deal with Pacific Lumber Co. to spare the tree and a buffer zone of redwoods around it. Over the Thanksgiving weekend, environmentalists visiting the tree found that a chainsaw had cut about one-quarter of the way through the trunk. The tree is still standing, but it is now more vulnerable to windstorms. "I feel this vicious attack on Luna as surely as if the chainsaw was going through me," Hill said. Authorities are investigating the vandalism.