A massive object that could potentially change our entire understanding of history may be lurking underneath the Antarctic ice, say scientists.
The so-called 'Wilkes Land gravity anomaly' was first uncovered in 2006, when NASA satellites spotted gravitational changes, indicating the presence of a huge object sitting in the middle of a 300-mile-wide impact crater.
Some researchers believe the anomaly could be the remains of a giant asteroid, the size of which far surpasses the one responsible for wiping out the dinosaurs - sounds plausible.
Meanwhile, in the tin foil hat camp, speculation is rife that the mystery object is in fact a UFO, or possibly even a secret Nazi base used for clandestine activities during the Second World War.
An aerial image of the Antarctic region. Credit: NASA
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The area is 151 miles across and has a minimum depth of about 2,700 feet.
If we were to believe the giant asteroid theory, it could mean that this object caused the Permian-Triassic extinction event, which killed 96 percent of Earth's sea creatures and up to 70 percent of land-dwelling organisms too.
A perfectly plausible explanation, but you've got to admit, it could do with a few more aliens in there to spice things up.
Thankfully, internet UFO hunting crew Secure Team 10 have come up with their own take on the Wilkes Land anomaly and have even taken the time to make a video about it for their YouTube channel.
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In the video, Secure Team 10 suggest that the anomaly could in fact be a Nazi base, designed to be used by UFOs in WWII.
The UFO hunters said: "There is some evidence of this coming to light in recent years, with images purporting to show various entrances built into the side of mountains, with a saucer shape and at a very high altitude.
"This begs the question: how would you enter these entrances without something that could fly and was the same shape as the hole itself?"
Credit: Secure Team 10/ YouTube
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The group also suggests the US Navy have led missions to investigate the mysterious area.
However, the scientist responsible for discovering the anomaly in the first place believes it is actually evidence of a massive impact crater.
"This Wilkes Land impact is much bigger than the impact that killed the dinosaurs, and probably would have caused catastrophic damage at the time," said Ralph von Frese, who was a professor of geological sciences at Ohio State University when he discovered the crater.
"All the environmental changes that would have resulted from the impact would have created a highly caustic environment that was really hard to endure. So it makes sense that a lot of life went extinct at that time."
Featured Image Credit: NASATopics: UFO, World News, Nasa