Landslide-triggered tsunamis due to melting glaciers and permafrost are becoming more common with global warming. Read more about Alaska and Greenland.
Super-marine heatwaves - extremely strong periods of hot weather - played a role in 2023's record high sea temperatures according to research published in July.
An international team of scientists has determined that Chicxulub dinosaur-killing asteroid was carbonaceous and originated from the deep outer solar system.
Using a remotely operated vehicle, scientists recently observed thousands of Port Jackson sharks, all female, sleeping on the seafloor off south Australia.