Experts from the University of South Florida unearthed a 5600-year-old underwater stone bridge in an ancient cave on Mollurca island, Interesting Engineering reported. The analysis conducted by the experts on the 25-foot-long (7.6-meter-long) bridge found inside Genovesa Cave has been published in the journal Communications Earth & Environment. The study showcases how human settlement might have been a reality on many of these islands across the western Mediterranean Sea way earlier than previously hypothesized by scientists. Current understanding places the time of human arrival on these isla…