The grisly discovery of a disembodied foot on a NSW beach was a tragic twist in the mystery of missing woman Melissa Caddick. Such tragedies can also reveal hidden currents connecting the planet.
There's much more to waves than the part you see at the beach. And it can all start hundreds, if not thousands, of kilometres from the shore.
Almost 30 years ago the world responded to the realisation that our ozone layer was in trouble. But an alarming recent development shows there is no room for complacency, write Shane Keating and Darry Waugh.