At least a mil­lion forms of life are hov­er­ing at the edge of extinc­tion, as humans take over the world. Lead author San­dra Diaz on the shock­ing new U.N. report. Then Columbia/​NASA sci­en­tist Kate Mar­vel explains ​“hyro­cli­mate” as rains and droughts go extreme. Alex updates four con­cur­rent heat waves strik­ing from the Arc­tic to India.