Today on The 21st: As students demand a greater voice on campus through protests and other means, where do you draw the line with free speech on a college campus? Plus, the not-so-surprising diet secrets of wildlife animals.

This hour on Focus, we’ll learn more about how yoga affects memory. Then, we’ll hear about the different styles of yoga, why it was originally practiced and how it has changed as it’s become more popular as a form of exercise in the West.