Glassy blue iceberg goes belly up

Photographer captures rare image of recently overturned berg

inverted iceberg in Cierva Cove, Antarctica

BLUE BERG  This glassy blue Antarctic iceberg flipped just days before a photographer captured this stunning picture. About 90 percent of an iceberg's volume sits below the waterline.

Alex Cornell

Roughly 90 percent of an iceberg’s volume hides beneath the waves. But every so often an iceberg’s underbelly makes an appearance above the waterline.