Rare rectangular icebergs spotted by Nasa in Antarctica are for real

The B-15 iceberg is the world's largest free-floating object ever recorded

The B-15 iceberg is the world's largest free-floating object ever recorded

Flying 1,500 feet above the Antarctic coast, NASA scientists recently passed over a bizarrely straight-edged rectangular iceberg and snapped a picture of the floating slab. But alien conspiracy fans will be disappointed to learn that it's a naturally occurring phenomenon.

Nature is messy. It's often geometric, but also riotous and irregular and asymmetrical.

Tabular icebergs, unlike the jagged, large chunks of ice we typically imagine as icebergs, are characteristically flat with vertical sides. This large slab of ice with nearly vertical sides and a flat top, and they are often formed after breaking off from ice shelves. Last year, an iceberg the size of DE dubbed A-68 broke away, causing concerns that the entire thing was about to break like the Larsen A and B ice shelves did before. "And then you have what are called "tabular icebergs", she said.

'My guess is that A68a 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.

The iceberg was spotted by senior support scientist Jeremy.

Most people think of icebergs as jagged, frozen mountains with only a fraction of their bulk sitting above the surface of the water, but it turns out that there's actually two kinds of icebergs: tabular and non-tabular.

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In the statement from NASA, Harbeck said he had actually been more interested in capturing the massive A68 iceberg, the size of the USA state of DE, which split off from the Larson C ice shelf in 2017. This iceberg is probably very new, since its sides are still smooth and nearly perfectly vertical.

Whether it's the recent tabular iceberg captured by NASA off the Larson C Ice Shelf, or the Wilkins blocks above, the method of their creation is the same.

The Larsen C ice shelf is being monitored continually because it has been showing signs of disintegration.

Experts have said if all of the Larsen C was to break free it could add another 4 inches (10 cm) to global sea levels over the years - however the breakage may not be down to climate change.

The agency also captured a triangular berg drifting in the Weddle Sea.

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