The Jakobshavn Glacier is a large outlet glacier in West Greenland.
It is located near the Greenlandic town of Ilulissat and ends at the sea in the Ilulissat Icefjord.
Up until very recently the glacier has been heading toward the sea and getting thinner. However, it seems as though the opposite is happening.
The glacier has slowed down its journey to the sea and has actually gotten thicker. Scientists say that it may be due to very cold temperatures in 2013.
Jakobshavn Glacier drains 6.5% of the Greenland ice sheet and produces around 10% of all Greenland icebergs.
Some 35 billion tonnes of icebergs calve off and pass out of the fjord every year.