When archaeologists 500 years from now dig into our dumps, they'll know when they get to 2020-2021 because there will be a layer of surgical masks.,(reply>), So the S&amp;M boundary then.,(reply>), ​@George Corbul medical masks are synthetic, so no. They're gonna be there for at least a few hundred years, possibly a few thousand. Although humorous, this is most likely true. It's no different than the worldwide layer of iridium preserved in sedimentary rocks from when the dinosaur-extinction event took place. It's a worldwide standard. masks in dumps from 2020/2021(/2022+?) will be the same.,(reply>), @David Maheengun Which tells us about vintage environmentalism!,(reply>), Unfortunately, all those masks are scattered along the roads and sidewalks, not in landfill sites.,(reply>), Bahahhaha was that an among us/covid reference :D???