51.   An engine room fire has disabled the Australian icebreaker Aurora Australis in sea ice, deep in Antarctic waters, scientists said Wednesday.

52.   Greenpeace said scientists believe the continued melting of sea ice will affect the production of algae, which live beneath the ice.

53.   Horning and Starke called for a U.S. Navy helicopter from McMurdo to carry the Emperors to the edge of the sea ice and freedom.

54.   If global warming decreases the production of sea ice, Nicholl hypothesizes, then the current would slow down.

55.   In February, a Cape Smythe Air pilot was injured after his plane crashed on sea ice about three miles from the Kotzebue airport.

56.   It can be an impenetrable plate of sea ice or a hazardous flotilla of ice floes.

57.   Jonrowe lost time Monday repairing her sled after skidding into some driftwood while on the sea ice near Elim.

58.   Jonrowe lost precious time Monday repairing her sled after skidding into some driftwood while on the sea ice.

59.   Now she is relying on him to lead the way over two mountain ranges, along rivers and miles of frozen sea ice.

60.   That was enough to send sea ice much farther south, blocking some Viking ocean routes.