sciencehabit writes "This morning, an animal rights group known as the Nonhuman Rights Project (NhRP) filed a lawsuit in a New York court in an attempt to get a judge to declare that chimpanzees are legal persons and should be freed from captivity. The suit is the first of three to be filed in three New York counties this week. They target two research chimps at Stony Brook University and two chimps on private property, and are the opening salvo in a coordinated effort to grant 'legal personhood' to a variety of animals across the United States. If NhRP is successful in New York, it would upend millennia of law defining animals as property and could set off a 'chain reaction' that could bleed over to other jurisdictions, says Richard Cupp, a law professor at Pepperdine University in Malibu, California, and a prominent critic of animal rights. 'But if they lose it could be a giant step backward for the movement. They're playing with fire.'"