Sharks are not the silent killers we thought, listen to the sounds they make / Sex Lives of Whale Sharks Caught on Camera: Pursuit, Love Bites, and Getting Into Position / Researchers find evidence that large sharks may be hunting each other / I'm obsessed with sharks: I used to kill them, now I risk my life to film them / Large sharks hunting each other 'may be more common than thought' / Remote island paradise has become blood-soaked haven for supersized SHARKS - and scientists have been left baffled / Real-life cocaine sharks: Scientists say sharks off the coast of Rio de Janeiro testing positive / Cocaine sharks: why sea creatures are swimming in drug-tainted waters / 'Cocaine sharks' found prowling waters in Brazil sparking increased aggression fears / 'Where do sharks hang out?': the race to find safe spaces for the Galapagos' ocean-going predators