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What the Heck Is This?

(Image 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." 

Robert Roy Britt

Robert is an independent health and science journalist and writer based in Phoenix, Arizona. He is a former editor-in-chief of Live Science with over 20 years of experience as a reporter and editor. He has worked on websites such as and Tom's Guide, and is a contributor on Medium, covering how we age and how to optimize the mind and body through time. He has a journalism degree from Humboldt State University in California.