Ice channels 250m tall and hundreds of kilometres wide have been discovered under ice shelves in Antarctica.
It is believed these channels were formed by meltwater flowing from grounded ice sheets rather than through oceanic process, as previously thought.
Researchers from the UK discovered the link between meltwater paths and ice channels through the use of airborne radar technology and satellite images.
Scientists believe the discovery will aid in exploration of environmental changes as the ice channels impact the stability of the ice shelves.
Read more at Newcastle University