how much should we fear that the end is near? a new study out of mexico, a great place claims we're in beginning of a sixth mass extinction of animals on earth and humans are to blame. the most recent mass extinction happened 65 million years ago. it's believed to be the one that killed dinosaurs. comedian joe mackey is a scary story correspondent. is it our fault? >> i don't think it is our fault. they say ocean and deforstation are causing a number of animals to go extinct. they say the good news with conservation we can stave off this mass extinction. that's not good news. no one says good news, you have to use less. >> given the choice you'd rather have the extinction? >> i'd rather party up and have