Now Harmon has carried out a new radar survey of Mercury, which shows that the areas which strongly reflect radio waves match closely the positions of polar craters photographed by Mariner 10, the American spacecraft which flew past Mercury in 1974 and 1975. (newscientist.com)
At least two large, supersalty lakes lie deep beneath an ice cap in far northeastern Canada, a new radar survey shows. (sciencemag.org)
And over the next two field seasons, US researchers will conduct radar surveys from the surface to study Lake Whillans near Antarctica's Ross Ice Shelf, says Ross Powell, a geologist at Northern Illinois University in DeKalb. (scientificamerican.com)