Climate change is making sharks ‘right-handed’

Warming oceans are changing the way sharks swim – and making them right handed, researchers have found. Australian scientists incubated eggs in tanks heated to simulate temperature changes at the end of the century. They found half died within a month, and those who survived became ‘right handed’, preferring to swim to the right, a process known as lateralization. The researchers say the changes show that climate change could have a far greater, and faster, effect on marine brains than thought.