EarthSky sends out a year's worth of thank yous to our friends from around the world who shared images with us throughout the year. Please keep sharing in 2018!
A short film about an expedition to Tibet's Guliya Glacier, where scientists drilled a Stone Age ice core going back 600,000 years. Plus a report on what the ice core reveals.
Meltwater from the glaciers supplies water to 800 million people, so that loss would mean serious consequences for water management, food security, energy production.