What mud from glacial lakes can tell us about our history and future

While on the National Geographic and Rolex Perpetual Planet Everest Expedition, a team of scientists travel to Nepal's Gokyo Valley to collect sediment cores from glacial lakes. Their mission is to gather data on the effects of climate change in the valleys surrounding the tallest mountain on the planet and reconstruct the region’s history using the mud. See what challenges they face while collecting samples at high glacial lakes in the Himalayas.