Mining of the ocean floor for minerals could harm deep-sea jellyfish by stressing them out with sediment. Plus, Iceland braces for volcanic eruption and seven charts on the challenge to keep global warming below 1.5 °C. Mining of the ocean floor for minerals could harm deep-sea jellyfish by stressing them out with sediment. Plus, Iceland braces for volcanic eruption and seven charts on the challenge to keep global warming below 1.5 °C.