Now, however, something weird has happened: NASA has taken a photo of what appears to be a perfectly flat, rectangular iceberg floating off the coast of the Antarctic. But alien conspiracy fans will be disappointed to learn that it's a naturally occurring phenomenon.
You're probably more used to seeing icebergs with odd geometric shapes.
A semi-circle shaped iceberg with vertical sides, from the Venable Ice Shelf.
The A68 iceberg is a chunk of ice about the size of the state of DE which was released by the Larsen C ice shelf previous year. At their largest, tabular icebergs can extend for hundreds of miles in length, and reach hundreds of feet below the surface.
A month from now, however, waves and melting will likely eat away at the iceberg's sharp, right-angled form. The berg is estimated to be more than one mile across and, like all icebergs, just 10 percent of its mass is visible above the surface.
NASA posted their findings on their Twitter, NASA_ICE, the said: "From yesterday's #IceBridge flight: A tabular iceberg can be seen on the right, floating among sea ice just off the Larsen C ice shelf".
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.
NASA is apparently happy to oblige, and has now directed fans to a Flickr page that features more of the odd iceberg as well as other tabular slabs that the team documented while flying high over the frozen region.
The iceberg was spotted by senior support scientist Jeremy.
The ice shelf is about 1,100ft thick and floats on the edge of West Antarctica.
This particular 'berg came from the crumbling Larsen C ice shelf on the Antarctic Peninsula.
"In addition, IceBridge collects critical data used to predict the response of Earth's polar ice to climate change and resulting sea-level rise".