KNTV NBC Nightly News With Lester Holt June 4, 2024 00:17:00
Peeing, they're going to be pooping, they're going to be bleeding because the edges are sharp and probably fighting in there. it is horrific. >> reporter: the vast majority of research monkeys die in a lab. very few wind up in a place like this. >> we are dealing with traumatized animals. >> reporter: a sanctuary for monkeys. liz tyson has a doctorate in animal welfare law. do you think long-tail macaques should be used in medical research? >> absolutely not. we need to work harder at finding alternatives. it's not to say we shouldn't do research blue it's to say we should by now doing differe...