The story of the man who invented the N95 mask. Birds in Canada have changed their tune in an unprecedented way that has stumped scientists. How to become a citizen scientist. The sixteenth century “reading machine” recreated by engineering students in 2018. And a new way to annoy your coworkers.Links:Peter Tsai invented N95 masks. He's come out of retirement to join the covid-19 fight. (Washington Post)Sparrows are singing a new song, in a rapid, unprecedented shift (National Geographic)Bird Baby Shower (Ahlers Adam, Twitter) These Are Some of the Best Citizen Science Projects You Can Join With Just Your Phone or Laptop (Gizmodo)How Students Built a 16th-Century Engineer's Book-Reading Machine (Atlas Obscura)How to Rickroll Your Zoom Meeting (Gizmodo)inviterick.comSee Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.