What to know

• Preliminary findings rule out infectious disease or environmental factors connecting deaths of Peekachu and RainS1
• Two Marineland whales that died weeks after being relocated to a Chicago facility had chronic, pre-existing diseases, Shedd Aquarium said Friday. The U.S. park, however, stopped short of saying that was the cause of death for Peekachu, a 23-year-old female bel...S2