This is the updated science on masks. How many droplets do they stop? What are the best kinds? How can you test them yourselves.

What Did We Learn This Week?:

2:00 - the history of breathing

8:30 - why are some people more sensitive to pain?

STUDYTIME:

12:20 - EVERYTHING YOU NEED TO KNOW ABOUT MASKS!

---

See acast.com/privacy for privacy and opt-out information.