@CNN: Ice skaters recorded this frozen lake in Norway ‘singing.’ The unusual frequencies are often a result of changing temperatures shifting the ice. https://t.co/ZxQ5NuAEzl https://t.co/Do0SdWuEHF
Ice skaters recorded this frozen lake in Norway 'singing.' The unusual frequencies are often a result of changing temperatures shifting the ice. https://t.co/ZxQ5NuAEzl pic.twitter.com/Do0SdWuEHF
— CNN (@CNN) January 26, 2019