Quantum Physics

Quantum Physics

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A dense cluster of differently sized red, blue, and green spheres overlaps against a black background, evoking the biggest mysteries surrounding the origin of the universe.
Starts With A Bang
We still don’t know how “hot” the hot Big Bang was
We've long known we can't go back to infinite temperatures and densities. But the hottest part of the hot Big Bang remains a cosmic mystery.
Ethan Siegel
Two illustrations: on the left, a ball bounces back after hitting a wall; on the right, inspired by quantum advances, the ball passes through—echoing breakthroughs honored with the Nobel Prize in Physics. A child throws the ball in both scenarios.
Starts With A Bang
Macroscopic quantum tunneling wins 2025’s Nobel Prize in physics
Quantum mechanics was first discovered on small, microscopic scales. 2025's Nobel Prize brings the quantum and large-scale worlds together.
Ethan Siegel
A colorful, abstract scientific illustration with a central glowing sphere, circular patterns, and various lines and circles suggesting quantum connections or uncertainty data points, on a dark background with blue accents.
Starts With A Bang
The single most amazing fact about the Universe
No matter what it is that we discover about reality, the fact that reality itself can be understood remains the most amazing fact of all.
Ethan Siegel
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