Original sentence: After twenty-six days on an ice shelf, first trying to shovel tons of snow to create an airstrip, untill someone suggested the easier way of tramping the snow surface, the expedition's six members squeezed themselves into the remaining plane
Edited sentence: After twenty-six days on an ice shelf, first trying to shovel tons of snow to create an airstrip, until someone suggested the easier way of tramping the snow surface, the expedition's six members squeezed themselves into the remaining plane