Ep. 7: This week I learned why sleeping with the lights on is a terrible idea, and more
![This Week I Learned show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/068/514/small/this-week-i-learned.jpg)
Summary: Artificial light at night | Cinnamon's brain-boosting powers | Humpback whales' altruism | The complicated history of doves at the Olympics
Summary: Artificial light at night | Cinnamon's brain-boosting powers | Humpback whales' altruism | The complicated history of doves at the Olympics