AP Blue Sky Science: Why do some animals go extinct while other species regenerate? May 15, 2019 Facebook Twitter SMS Email Print Save Some species are simply more rare than others and don’t occur in very large numbers. But usually there is some factor that has driven a population to even greater rarity. Tags Wire Field59 Blue-sky-science Latest video Watch Aaron Rodgers lose a beer chugging contest to Bakhtiari and Yelich Large wedge tornado swirls ominously at night in Oklahoma Virginia storm causes transformer to explode Daylight reveals tornado damage to Jefferson City, Missouri Memorial Day: What will the weather be for your area? Sparks fly from Virginia power lines in midst of wild storm Large violent tornadoes spotted tearing through Oklahoma and Missouri Memorial Day What will the weather be for your area? Facebook Twitter SMS Email Print Save Most Popular With soil collapsing under homes, Billings homeowners want class action status for lawsuit Billings Clinic CEO fired Feral swine amass at Montana's northern border Highway 87 open after 3-car crash blocked traffic near Metra Felon had contact with students at Billings elementary, district says after complaint View All Promotions promotion spotlight Could you pass a U.S. civics test? promotion spotlight What should you be driving?