VIRGINIA:- A US-based scientist was killed in Antarctica when the snowmobile he was driving plunged into a crevasse on Saturday, the US National Science Foundation (NSF) said in a statement on Monday. Gordon Hamilton, 50, a University of Maine professor in the School of Earth and Climate Sciences, and a researcher with the Climate Change Institute, fell 100 feet (30.48 metres) into the crevasse, the NSF statement said. Hamilton’s body has been recovered and US Antarctic Program personnel have opened an investigation into his death.