Climate change: Coral samples show Great Barrier Reef ‘in danger’

Ove Hoegh-GuldbergThere have been five mass coral-bleaching events at the Great Barrier Reef over the past nine years A study of samples taken from inside the bodies of centuries-old coral has revealed the threat climate change now poses to the Great Barrier Reef.Researchers in Australia say temperatures in and around the vast coral reef over the past decade are the highest recorded in 400 years.Extreme heat has…