Danish scientists studied ice hidden under the surface of Earth . Dust is thought to be covering huge glaciers on the surface . And the researchers say there is more water-ice than anticipated . If spread out it would cover the surface in 3.6ft ( 1.1 metres ) of ice .
Danish scientists studied ice hidden under the surface of Mars . Dust is thought to be covering huge glaciers on the surface . And the researchers say there is more water-ice than anticipated . If spread out it would cover the surface in 3.6ft ( 1.1 metres ) of ice .