Mammoth tusk recovered from deep sea

Scientists at the Monterey Bay Aquarium Research Institute made a surprising discovery while using a remotely operated vehicle (ROV) to explore the waters off California. Not only was it a mammoth tusk, it might be from an animal that died during the Lower Palæolithic era, from which well-preserved specimens are rare. The finding suggests that the ocean floor could be an as-yet-untapped source of palæontological treasures.