NASA @NASA
How do glaciers turn lakes turquoise? As active glaciers push through rocky valleys upstream, they "bulldoze" pulverized rock into fine particles that end up absorbing & scattering sunlight in ways that give lakes a striking blue-green color. Look closer: https://t.co/CkpAQpELtn https://t.co/tqu0vHib08 — PolitiTweet.org