New research has found that a major Greenland glacier that was once one of the fastest shrinking on Earth is now growing again. Scientists from the American space agency NASA recently reported their findings about the Jakobshavn glacier, which sits off the island’s west coast. NASA said Jakobshavn had been Greenland’s fastest-flowing and fastest-thinning glacier for the past 20 years. During that time, it was the single largest source of mass loss from the Greenland Ice Sheet. Because of the glacier’s size and activity, researchers have used it to help predict world sea level rise. Scientists from NASA and other organizations have been observing Jakobshavn for many years. Researchers involved in the study say that, since 2016, the glacier has experienced major thickening. It is also flowing more slowly and moving toward the ocean, instead of retreating inland.