They think the canyon is earlier than the ice layer that has been covering it for the last millions of years.To compare it with something,the longest river in England,the Servern river,has 350 kilometers and it is less long and wide than the Greenland Cayon.
The scientists mesured and reconstructed the landscape thanks to the data that the NASA and Germany scientists have been storing for many decades using an airborne radar.
.But during the analysis of the radar data,they discovered that the cayon extended almost from the center of the island to the upper part of it, dividing itself in different paths that lies to different zones of the island connecting with the Atlantic Ocean
The scientists said that it is transporting all the subglacier-melted water to the ocean.
-Jandro López Gómez-