Throughout Earth’s history there have been five major mass extinction events—where a large percentage of species died out. Scientists estimate that we are in the middle of the 6th mass extinction event right now, where species are dying out at 1,000 to 10,000 times baseline extinction rates. Moral and ethical arguments to try to prevent species extinction include reasons like all life has a right to be here, or that we owe it to our grandchildren to protect species so they can see them in the wild. So, are species worth saving from extinction? Have your students watch the video and respond to the question in KQED Learn.