The Ice Dragon, a modified Seaglider operated by the Virginia Institute of Marine Science, has explored under the Antarctic ice shelf, and another modified Seaglider, the Deepglider, can plumb the depths down to 6km (20, 000 feet).

ECONOMIST: Fleets of robot submarines will change oceanography

Peter West, spokesman for the National Science Foundation, which oversees the U.S. Antarctic Program, said 24 hours of daylight this time of year should help rescue efforts.

CNN: STORY HIGHLIGHTS

Tom Sharpe, Antarctic geologist and curator of the exhibition Captain Scott, South For Science, argues that Wales fell in love with the mission because of the brilliant propaganda of the Terra Nova's second-in-command, Edward (Teddy) Evans, later Lord Mountevans.

BBC: Scott of Antarctic 'propaganda created Welsh obsession'