Many millennia from now, when humans are long vanished from the Earth, intergalactic travelers visiting our planet may wonder about this world’s ancient inhabitants and their civilizations. One clue these visitors will be able to use in their investigations will be the presence of a class of manmade chemicals called per- and polyfluoroalkyl substances (PFASs). Dubbed “forever chemicals,” PFASs will likely outlast humanity.

Read more…