 The north-east Greenland ice stream has been observed to have a high degree of horizontal anisotropy which can lead to faster ice flow in certain directions. This anisotropy is caused by the crystalline structure of the ice which changes over time due to its interaction with the environment. This change in crystalline structure leads to a decrease in the strength of the ice making it easier to flow in certain directions. This article was authored by Tamara and Nina Gerber, David A. Lyon, Nicholas Moser-Rathman, and others.