The crack in Antarctica's Larsen C Ice Shelf that looks set to spawn a giant iceberg has spread a further 10km.
Scientists say ants can plot a route home even when travelling backwards.
Temperature data for 2016 shows it is likely to have edged ahead of 2015 as the world's warmest year.
One munched on a foot-long snake
Hopes rise for scientists studying Saturn’s rings
My battle with depression, anxiety and panic
The unlikely weapon against an endemic disease
Our guide to the big science events of 2017
A further selection of the year's best science and environment reads
Stories from the natural world