Ancient Submerged Bridge in Mallorca Cave

An ancient submerged bridge in a cave on the Spanish island of Mallorca is helping researchers determine when humans first settled on islands across the western Mediterranean Sea thousands of years ago. The bridge was built nearly 6,000 years ago and was likely used for 400 to 500 years before rising sea levels covered it. The presence of the bridge suggests a sophisticated level of activity by early settlers in recognizing and utilizing the cave's water resources.