"The British Antarctic Survey is to pull all staff out of its space-age Halley base in March for safety reasons.

The highly unusual move is necessary because the Brunt Ice Shelf on which the research station sits has developed a big new crack.

BAS officials say neither staff nor the base are in any immediate danger but believe it would be prudent to withdraw while the situation is assessed."

Jonathan Amos reports for BBC News January 16, 2017. [2]