A Reddit mathematician calculated how large a meatball formed from the entire human population would be, estimating it at 0.6 miles wide, which surprised many users. The calculation started with the world population of 7.88 billion people and averaged body mass and density values. This conceptual idea was inspired by visualizing the population in large spaces like the Grand Canyon, and the mathematician also produced a visual representation of this meatball in Central Park, sparking significant online interest and reaction.
Doesn't really look all that big for 7.8 billion people.
If you blended all 7.88 billion people on Earth into a fine goo... you would end up with a sphere of human goo just under 1 km wide.
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