«The suggestion that the Earth was once entirely covered by ice — the continents by thick ice sheets and the oceans by thick sea ice — remains somewhat contentious,» says physicist Richard Peltier of the University of Toronto. (giss.nasa.gov)
Now imagine an earth covered in a largely unknowable configuration of kilometers thick ice sheets. (julesandjames.blogspot.ru)
Led by glaciologist Jérôme Chappellaz of Joseph Fourier University in Grenoble, France, the $ 3.2 - million (US$ 3.4 - million) SUBGLACIOR probe, which is about the same width as RAID, can penetrate the more than 3 - kilometre - thick ice sheet in a single season. (scientificamerican.com)