
US Department of the Interior @Interior
Why is this glacier ice at @GlacierBayNPS in #Alaska blue? Glacier ice is blue because the red part of white light is absorbed by ice. The blue light is transmitted and scattered. The longer the path that light travels in ice, the more blue it appears! The more you know 🌈 🎵 https://t.co/eKrRmn2Zfk — PolitiTweet.org