One of the largest glaciers in Antarctica, known as the Thwaites or ‘Doomsday’ glacier, is as big as Great Britain and holds enough water to raise sea levels by 65cm. That’s why scientists from the ​​International Thwaites Glacier Collaboration are worried that warmer ocean temperatures could cause a huge ice shelf attached to the glacier to break off in as little as 5 years. If that happened, they warn it could accelerate the melting, as the ice shelf currently acts as a barrier for the ice entering the ocean. And satellite imagery is already showing cracks growing in the ice… But next year, the team will send a little yellow submarine called ‘Boaty McBoatface’ under the glacier to gather data on all the factors that influence melting. “It’s scary. We might not get Boaty back,” said Dr Alex Phillips. Fingers crossed for him…