@@teecchnoboy The average human is 62 kg, which translates to about 62,000 cm³ in volume. There are about 7.8 billion humans alive today, bringing the total volume of all humans to 0.4836 km³. So if we pushed every person together into a cube, it would have a side of 785 m - just short of the height of our tallest skyscraper. It would be a terrible experience for everyone, but we should try it anyway.
An interesting fact is that people are closer in size to the observable universe than to the Planck length, since the size of the Planck length is ~10^-35 m, a person is ~10^0 m, and the observable universe is ~10^27 m, and in the middle between the Planck length and the observable universe is ~10^-4 m or 0.1 mm or a human egg, as well as it is the minimum size visible to us with the naked eye.
