What the Heck Is This?
Credit: NOAA/Rear Admiral Harley D. Nygren

Seeing just part of this image doesn't reveal much. But perhaps the blue tint gave you a hint?

It's a photo of an iceberg in the waters off Antarctica. See the full image below.

Icebergs are constantly breaking off the continent, in a process called calving. Often one huge iceberg — miles long — will float around, crash into things, and break into smaller icebergs over time.

Know why icebergs float? It's because they contain a lot of air — billions and billions of tiny, trapped bubbles.

This was the first installment of "What the Heck."