Discovery News: When they emerge onto beaches around the world to lay their eggs in the sand, sea turtles expose themselves to a trio of threats from climate change: cyclones, rising seas and warming temperatures. A new study finds that for the world’s largest population of sea turtles — in Australia’s northern Great Barrier Reef — blazing hot sands pose the greatest threat to the animals’ breeding success over the long term. The researchers predict that from now until 2030, sea level rise …