Iceberg flipping over revealing very old blue ice.
byu/lpomoeaBatatas ininterestingasfuck
What we are seeing here is a glacier moving along a channel and breaking off pieces that become icebergs. The ice is much deeper than it first appears. One large chunk breaks off and then slowly flips. We can see that the ice is bluer the deeper it goes, but when the bottom side finally surfaces, we see how blue it really is. And that's really, really blue, like artificial raspberry flavor in a bomb pop. The location of this glacier isn't posted, but some redditors think it's Grey Glacier moving over Grey Lake in southern Chile.
Why is the bottom so blue? That part is where the ice is the oldest and most compressed and the air bubbles are squeezed out, so it contains more actual water than the whiter parts on top. Water in large quantities is blue. You'll find a more detailed explanation at Wikipedia. If your local lake or pond is green instead, that's because of the things that live in it. -via reddit