A new-found fossil reveals the soft body of a 500-million-year-old undersea creature. Hemichordate Galeaplumosus abilus may provide clues to the evolution of vertebrates like us.
David Monsma of the Arctic Institute describes key findings and recommendations of a new report - The Shared Future - from the Commission on Arctic Climate Change.
Freshwater in the Arctic Ocean has increased since the 1990s. The increase may be due to melting sea ice, input from rivers, and changes in ocean circulation.