Only 25 glaciers remain inside Glacier National Park — down from 150 in the mid-19th century — and scientists estimate that these peaceful giants that sculpt the homes of grizzly bears and wildflowers will be gone by 2050.
ICESat-2's laser is split into six beams, to better measure Earth's surface. Find out more here.
Meet Your Guides
Hang out with Paige and Pho in the FunZone! Learn all about the ICESat-2 mission through videos and activities.
Laser Focus: Timing
Deputy Systems Engineer Phil Luers explains how the ATLAS transmitter and receiver subsystems come together to calculate the timing of photons, which, in turn, measure the elevation of ice.