Rectangular iceberg floating in Antarctica spotted by NASA

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Kelly Brunt, an ice scientist with NASA and the University of Maryland, said such icebergs are fairly common.

"You can see at between 7-12 July 2018 the weather conditions and ocean currents conspire to swing the trillion tonnes of the giant iceberg A68 in an anticlockwise direction", he said.

"In addition, IceBridge collects critical data used to predict the response of Earth's polar ice to climate change and resulting sea-level rise".

The mile-wide "tabular iceberg" was seen floating among sea ice off the Larsen C ice shelf by one of the U.S. space agency's research planes.

The US space agency said the object's sharp angles and flat surface suggested it had recently broken away from an ice shelf.

As for the size of the iceberg NASA photographed, Brunt said it's possibly more than a mile across - but it hasn't been measured yet.

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"[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.

As with all icebergs, the part visible above the surface is just the top 10 percent of its mass.

"My guess is that A68 will continue rotating as it is now around that western point, until what is currently the northern edge collides with the Larsen C ice front".

Two perfectly placed rectangular icebergs captured by the Nasa's Operation Icebridge team has set the internet aflame. "You can just get these fracture lines that can form these interesting geometric structures", he says, and points out a different, triangle-shaped iceberg spotted by NASA scientists recently.

NASA also shared a picture of a perfectly triangular block of ice found nearby and taken on the same trip, Operation Icebridge. After years of anticipation by scientists, a formation the size of DE broke off from Antarctica last year.