Rip Currents: Friend Or Foe?I run a popular community education program called The Science of the Surf that started off as monthly seminars at Tamarama Beach with a release of harmless purple dye into the rip current (hence the nickname ???Dr Rip???).It???s been 10 years since I started and I???ve now presented my talk to over 50,000 people, mostly school kids, and mor