Ep. 25: This week I learned plants can be conditioned just like Pavlov's dog, and more
![This Week I Learned show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/068/514/small/this-week-i-learned.jpg)
Summary: Pavlov's plant | The sad evolution of tuskless elephants | Sleep deprivation can lift depression | Your joyless MP3s
Summary: Pavlov's plant | The sad evolution of tuskless elephants | Sleep deprivation can lift depression | Your joyless MP3s