Cool armor-like technology that butterflies have on their wings to protect them from the rain. How to use Slack without annoying all of your coworkers, or being annoyed yourself. And what 1918 anti-mask culture can teach us about our own mask debates today.Links:Armor on butterfly wings protects against heavy rain (Phys.Org)How to Use Slack Without Driving Your Coworkers Crazy (Wired)The 1918 Flu, Masks and Lessons for the Coronavirus Pandemic (NY Times)Jackson Bird on TwitterSee Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.