This iceberg looks like a flawless rectangle

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A weird iceberg has been spotted by NASA scientists - in the shape of a near-perfect rectangle.

NASA photographed the odd object in Antarctica last week as part of Operation IceBridge.

A big crack in Antarctica's crumbling Larsen C ice shelf caused the huge iceberg to break free in July 2017.

The tabular iceberg appears to be floating, but it's unknown how much of it lies below.

Ice shelves are full of fractures and fissures, explains geophysicist Kristin Poinar from the University at Buffalo.

Needless to say, this photograph isn't telling us the whole story.

"[Icebergs] look like these handsome pristine white things from a distance, but if you look a little closer, they're really mangled and full of cracks", she says.

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NASA scientists spotted this "tabular iceberg" floating near the Larsen C ice shelf in Antarctica.

As with regular icebergs, just 10 percent of its mass is visible in the picture, though the subsurface mass is would look similar to what's visible above.

"After a while, a tape measure will bend from its own weight", Catherine Walker, a NASA scientist who researches Antarctic glaciers, said in an interview.

These are flat and long and form by splitting away from the edges of ice shelves.

It's also likely that this iceberg isn't the ideal cube it appears to be in the photograph. I should think we will see some interesting collisions with the ice shelf in the next few months'.

The researchers wrote, 'Computer modeling suggests that the remaining ice could become unstable, and that Larsen C may follow the example of its neighbour Larsen B, which disintegrated in 2002 following a similar rift-induced calving event'. As climate change continues to warm temperatures at the poles, scientists are increasingly concerned that Antarctica is melting. The ice is "being kind of spread out in this very thin layer", Petty says, and "because it's ice and it's brittle, if that gets too weak or it comes into contact with something else, it can shatter and kind of break apart". Though icebergs often calve off, a portion of that ice is replaced by snowfall.

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