you know the feeling. you just never imagined you could get it from selling your car. well, with carvana, you can. experience the new way to sell a car. we're back with our health lead, and a cnn special airing this weekend, taking a closer look into the origins of coronavirus. cnn's dr. sanjay gupta's back with us now. sanjay, let's play a preview of your special. ♪ >> chan is one of 18 prominent scientists who published a letter in science magazine in may of this year calling for an investigation into all possible