Scientists using underwater drones to thicken Arctic ice

Scientists have been working to stave off summer in one of the Earth's coldest places in a bid to protect rapidly melting Arctic sea ice -- and it appears to be working.

Scientists using underwater drones to thicken Arctic ice
Scientists have been working to stave off summer in one of the Earth's coldest places in a bid to protect rapidly melting Arctic sea ice -- and it appears to be working.