Children play in a model undersea submersible at the Unseen Oceans exhibition held in the American Museum of Natural History in New York, the , March 14, 2018. The exhibition highlights the latest advances in ocean exploration, the researchers and technologies behind them and the mysteries that remain. Visitors can join scientists on their high-tech, high-adventure, and high-impact fieldwork to see and discover beautiful, diverse, and important creatures living at previously unseen ocean layers. (Xinhua/Wang Ying)