Tap a solid wooden table. The sensation is undeniable: it’s hard, it’s solid, it’s right there. Yet atomic physics tells a story that verges on paranoid delusion: everything you see, touch, and feel is made of 99.9999999% absolute empty space. If we removed all the “dead” space between the atomic nuclei and electrons of every living person on Earth, the 8 billion individuals on the planet would fit inside the volume of a sugar cube… which would weigh hundreds of millions of tonnes.
The Vertigo of the Infinitely Empty
To grasp the magnitude of this absence, you must change scale. Imagine the nucleus of a hydrogen atom—a simple proton—being a golf ball resting on the halfway line of a football stadium. To preserve the true proportions of the atom, its lone electron would not circle the field: it would orbit in the highest tiers, hundreds of meters away.
Between this golf ball and that electron’s grain of dust? Absolutely nothing. Not even air, since air itself is made of atom’s emptiness. If you could see matter as it truly is, the world would appear to you as a ghostly haze, an immense desert in which a few points of solid matter float at astronomical distances from one another. This observation raises an immediate question that unsettles our senses: if we are made of emptiness, why don’t we pass through walls?
Permanent Levitation: The Myth of Contact
The answer lies in the first great secret of physics: you have never truly “touched” anything in your life. What you perceive as solid contact is, in reality, an electromagnetic trench warfare.
The electrons that orbit around your atoms carry a negative charge. Those of the atoms in your chair carry the same charge. When you try to sit down, the electronic clouds of your body come close to those of the seat. Like two magnets forced to meet at identical poles, they repel with invisible violence. You do not “touch” the chair; you hover at a distance of one ten-billionth of a centimeter above it, sustained by the electromagnetic force. The sensation of hardness is a brain-made interpretation, a nervous reading of that electrical resistance. We are specters floating on other specters.
Degenerate Matter: When the Void Collapses
If this void is so dominant, it’s because the forces of nature keep the constituents of the atom at a respectable distance. But what happens if one manages to “crush” this void? This is not a mere thought experiment: it happens in the cosmos’s most extreme corners.
When a giant star dies and collapses inward, gravity becomes so colossal that it overcomes the electrons’ resistance. The void is expelled, and the atomic components are compacted against one another. What results is a neutron star. A teaspoon of this matter weighs a billion tons. It is the “real” state of matter without its empty space.
That is what would befall humanity if it were compressed into its own sugar cube: it would lose its volume but retain its entire mass, becoming an object of terrifying density capable of plowing through the Earth’s crust by gravity alone.
Proof by the Numbers
To prove this claim, one must delve into the atom’s intimate structure—the very definition of emptiness. An atom comprises a central nucleus around which electrons orbit, yet the size ratio between the two is staggering: the nucleus is about 100,000 times smaller than the atom itself. In terms of volume, that means the nucleus occupies only one one-millionth of a billionth (that is 10^-15) of the atom’s total space.
The rest? An absolute void threaded by force fields. If we could remove this electromagnetic emptiness from every human being, we would be left with only the dense matter (the nuclei).
By multiplying humanity’s total mass (about 560 million tonnes) by nuclear density (2.3 × 10^17 kg/m^3), we obtain a volume of about 2.4 cubic centimeters. It is mathematically irrefutable: all of humanity, stripped of its emptiness, would fit perfectly within the standard dimensions of a sugar cube measuring 1.5 × 1 × 2 cm.
An Architecture of Light
Understanding our own vacuity changes how we view the universe. We are not statues of heavy flesh, but cathedrals of void, sculpted and kept in shape by constant electric interactions. We are physical data structures where information (the position and charge of particles) matters more than the substance itself.
The next time you shake someone’s hand, remember that your atoms never actually meet. You have merely felt the dance of the force fields from another cloud of emptiness. The world’s solidity is a modest veil cast by our senses on an universe that, at its core, consists only of vast empties and a few sparks of energy.
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