Ep. 22: This week I learned Australia wiggles back and forth, pigs can be optimists, and more
![This Week I Learned show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/068/514/small/this-week-i-learned.jpg)
Summary: Australia's seasonal dance | A pigpen, half full | George Washington's herculean immune system | A brief history of "baby shows"
Summary: Australia's seasonal dance | A pigpen, half full | George Washington's herculean immune system | A brief history of "baby shows"