Going with the flow: Visualizing ocean currents with ECCO ocean model / New study reveals new intricate behaviors of deep-sea currents / Seal tags allow scientists to track ocean currents and climate change / Tagging seals with sensors helps scientists track ocean currents and a changing climate / For microscopic organisms, ocean currents act as 'expressway' to deeper depths, study finds / Newly uncovered history of a key ocean current carries a warning on climate / Scientists warn that a crucial ocean current could collapse, altering global weather