Exactly what kind of microbes bored into the rock remains unknown, as does whether they still exist or have long since gone extinct. Whether or not this mysterious form of life still exists or went extinct eons ago is, however, yet unknown. Passchier wanted to see if the organisms that created the burrows could possibly belong to any of these groups. Calcium carbonate dust found in the tunnels is also a common excretion from microbes that live in these types of rocks. Photo credit: Hearst OwnedGet the IssuePhoto credit: Hearst OwnedGet the IssuePhoto credit: Hearst OwnedGet the IssuePhoto credit: Hearst OwnedAdvertisement AdvertisementAdvertisement AdvertisementGet the IssuePhoto credit: Hearst OwnedGet the IssuePhoto credit: Hearst OwnedGet the IssuePhoto credit: Hearst OwnedGet the IssuePhoto credit: Hearst OwnedAdvertisement AdvertisementAdvertisement AdvertisementGet the IssuePhoto credit: Hearst OwnedGet the IssueYou Might Also Like