Why do shark attacks happen and how common are they? 06:41 A man spearfishing with friends was killed by a shark on the Great Barrier Reef on Sunday, police said, in Australia's second fatal shark ...

It's "extraordinary", says shark researcher Chris Pepin-Neff: four shark bites within 48 hours, and three of them within a 15km (9-mile) stretch of Australia's east coast. On 18 January, a 12-year-old ...