First full day in Hurghada while we wait for the dive boat. Off to the market to buy passion fruit and dates. (fb)

Sharks Break Their Silence. A team of researchers recently recorded sharks of one species making short, high-frequency clicks when handled underwater. The study’s results, published this week in Royal Society Open Science, represent the first known observations of sharks actively producing sound. It raises the possibility that sound production is an ancient trait widespread among sharks and their cartilaginous kin. (Scientific American) (fb)