Earth Science Week on Instagram: "Is this pretty rock actually one of the oldest fossils? 🪨🤔 Actually, yes! Banded Iron Formations, or “BIFs” for short, can be considered a sort of trace fossil because they are indirect evidence of life in the past! 🤯 You can learn more about this Fossil Friday Feature at bit.ly/banded-iron-formation, and don’t forget - we’ll be highlighting a different fossil from the Paleontological Research Institute’s (@museumoftheearth) 3D model collection each week! So