Beach-goers in Western Australia (the area in the world with the greatest amount of yearly great white shark attacks) now know in real time when sharks are close to the shoreline. How? The sharks tweet their presence! Scientists have tagged about 320 sharks, including great whites, with acoustic transmitters whose signals are picked up by satellite-connected buoys close to the beach. When tagged sharks gets within a kilometre of the beach, information, including the size, breed and distance of the shark from the shore, are all read and automatically tweeted by the Surf Life Saving Western Australia Twitter account.