Atom Apr 2026

: If an atom were expanded to the size of a professional sports stadium, the nucleus (where almost all the mass lives) would be no larger than a marble sitting on the 50-yard line.

Perhaps the most mind-bending fact about atoms is that they are . : If an atom were expanded to the

The atoms in your body weren't always yours; they have a cosmic history: : The simplest atoms, like hydrogen and helium,

: Heavier atoms, including the carbon in your DNA and the calcium in your bones, were forged deep inside ancient stars and scattered across space when those stars exploded as supernovas. The Miracle of Empty Space Our understanding of

: The simplest atoms, like hydrogen and helium, were created in the first few minutes after the universe began.

Atoms are the fundamental "Lego bricks" of the universe, constructing everything from the screen you are reading this on to the very cells of your body. Despite making up everything we see, they are so small that a single strand of human hair is as thick as roughly stacked on top of each other. The Miracle of Empty Space

Our understanding of the atom has shifted from philosophical guesses to precise quantum models: What is an Atom?