Kasia Cieplak-Mayr von Baldegg, Sam Price-Waldman, Daniel Lombroso / The Atlantic

Here are the best quotes we heard from our sources today. (Click through to read the full stories.)

Tracey Meares, a law professor (pictured above): “Until we actually have a conversation about what privilege really means, we will never understand what racism means.”

David Hartgen, a transportation expert, on why it’s hard to get people to use public transit: “It’s an extremely difficult thing to do because we have this minor detail in this country called freedom.”

Jack Gilbert, a microbiologist, on why antibiotics are limited: “They’re like nukes. We want to get snipers.”

(Previous quotes from our sources here)