Near-perfect rectangular iceberg found in Antarctica

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

But alien conspiracy fans will be disappointed to learn that it's a naturally occurring phenomenon.

Operation IceBridge's mission is to image the planet's polar regions to better understand how ice has changed and shifted in recent years. People didn't just find it interesting, they became totally obsessed with its weird geometric perfection and demanded more. In the photo published, one can only admire nature, which, in all its chaotic randomness, can produce nearly ideal geometric shapes on such a large scale.

The second are called "tabular icebergs", Ms Brunt said, comparing their formation to a fingernail growing too long and breaking off at the end. 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.

The icebergs' sharp angles and flat surface indicate that they probably recently calved from the ice shelf. Over time, the sea and wind will start to erode its smooth edges.

Just past the rectangular iceberg, which is visible from behind the outboard engine, IceBridge saw another relatively rectangular iceberg.

As you can see in the above tweet, the space agency described the block as a "tabular iceberg" which seems to have recently broken off the Larsen C ice shelf.

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Larsen A, an ice shelf farther north on the peninsula, broke up in 1995.

A strikingly rectangular, naturally formed ice sheet has been spotted by NASA during a regular flyover on October 16.

Such icebergs usually split from the edges of ice shelves, and can have angles close to 90 degrees, provided there is clean calve of the iceberg.

The Larsen C ice shelf is just one of many climate scientists are monitoring. Tabular icebergs also often crack and fall apart, perhaps through a collision, forming a less regular shape.

Brandon wrote on his blog that in July, 'the weather conditions and ocean currents conspire to swing the trillion tonnes of the giant iceberg A68 in an anticlockwise direction.

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