A dynamic early East Antarctic Ice Sheet suggested by ice-covered fjord landscapes. - Young, Duncan A.; Wright, Andrew P.; Roberts, Jason L.; Warner, Roland C.; Young, Neal W.; Greenbaum, Jamin S.; Schroeder, Dustin M.; Holt, John W.; Sugden, David E.; Blankenship, Donald D.; van Ommen, Tas D.; Siegert, Martin J. (Nature, 2011)