What I saw on the web on 2022.5.11

1. EU to lift mask requirement for air travellers next week
   by the Associated Press
   https://www.cbc.ca/news/world/european-union-mask-air-travel-1.6449027
   i wonder what the science behind this is
   via rss
   
   
2. Concussions can cause changes in gut bacteria
   by Mark Frauenfelder
   https://boingboing.net/2022/05/11/concussions-can-cause-changes-in-gut-bacteria.html
   the causation aspect here is just weird
   via rss