Why is it so hard to feel the difference between 400,000 and 500,000 COVID-19 deaths — and how might that impact our decision making during the pandemic? In this bonus episode from NPR's daily science podcast Short Wave, psychologist Paul Slovic explains the concept of psychic numbing and how humans can often use emotion, rather than statistics to make decisions about risk. To hear more about new discoveries, everyday mysteries, and the science behind the headlines, listen to Short Wave via Apple or Spotify.