The 300-million-year-old fossil (seen in an undated picture), which dates to the Carboniferous period, was likely made by an ancestor of the mayfly, scientists say. (See picture: “Oldest-Ever Bee Found in Amber.”)
In 2008, fossil hunters found the ancient imprint while searching woods behind a suburban shopping mall in North Attleboro, Massachusetts. The extremely rare find “is like winning the lottery,” study leader Richard J. Knecht, a geology student at Tufts University, told National Geographic News at the time.
Story: National Geographic News | Photo: Jacob Benner, Tufts University