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If every single human being currently alive on Planet Earth piled on top of each other in the Grand Canyon, it would barely fill a fraction of it.

An amazing mock-up image, produced by YouTube channel Vsauce, a shows that the world's 7.2 billion inhabitants would only take up a tiny corner of the iconic landmark.

This startling conclusion is reached thanks to the use of some basic maths.

Blogger Eesmyal Santos-Brault explained: "The average weight of humans is about 70 kg. That means 7 billion humans weigh about 490 million tons.

"Since we are comprised of mostly water, which has a density of 1000 kg/m^3, the average volume of a human is 0.07 m^3.

"That means the total volume of all humans would be 490 million cubic metres, a cube with sides 788m long."

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This so-called 'human cube' would actually be dwarfed by the world's tallest building, Burj Khalifa in Dubai, by roughly 40m.

It would also fit snuggly into the cavernous expanse of the Grand Canyon.

Even more damningly, if we add to this every human that had ever lived - an estimated 106 billion - the giant orange fissure would still have room for more.

These eye-opening revelations have boggled over 1 million minds on YouTube - despite the video only being uploaded three days ago.

Anybody feeling self-conscious about their weight can now rest easy - we, as human beings, are still very, very small.