Capsules

Semiconductor Doping

Doping is the deliberate introduction of impurities into a semiconductor in order to control its electrical behaviour. Every transistor, and…

Room-Temperature Superconductors

A material that conducted electricity with no resistance at ordinary temperatures and pressures would be genuinely transformative, eliminating losses…

Graphene

Graphene is a single layer of carbon atoms arranged in a hexagonal lattice, one atom thick. Its measured properties are extraordinary and not in…

Climate Sensitivity

Climate sensitivity is the amount of warming that follows from doubling the concentration of carbon dioxide in the atmosphere. It is the single…

Radiocarbon Dating

Radiocarbon dating measures how much carbon-14 remains in something that was once alive, and converts that into an age. Developed by Willard Libby in…

byCapsule0 votes0 reviewsJun 22, 2026

Ohm's Law

Ohm's law is the basic rule governing electric circuits. It states that the current flowing through a conductor is directly proportional to the…

Theory· Scientific

Quantum Field Theory

Quantum field theory is the framework that combines quantum mechanics with Einstein's special relativity to describe the fundamental particles of…

byCapsule0 votes0 reviewsJun 20, 2026

byCapsule0 votes0 reviewsJun 20, 2026

Conservation of Momentum

Conservation of momentum is one of the most fundamental and reliable laws in all of physics. Momentum, the product of an object's mass and its…

Theory· Scientific

The Standard Model of Particle Physics

The Standard Model is the theory that describes all the known elementary particles of matter and the forces that act between them, except for…

byCapsule0 votes0 reviewsJun 19, 2026

byCapsule0 votes0 reviewsJun 19, 2026

The Equivalence of Mass and Energy

Mass and energy are two forms of the same thing. This is the meaning of the most famous equation in science, which states that the energy contained…

Hypothesis

Is Time Travel Possible?

Time travel, journeying into the past or the future, is a staple of science fiction, but is it actually possible? The surprising answer from physics…

Fact· Historical

The Manhattan Project

The Manhattan Project was a secret American research effort during World War II that produced the first atomic bombs. A vast scientific and…

Fact· Historical

The Large Hadron Collider

The Large Hadron Collider, or LHC, is the world's largest and most powerful particle accelerator, built by the European laboratory CERN near Geneva.…

Fact· Empirical

Quantum Computing

Quantum computing is a new kind of computing that harnesses the strange rules of quantum mechanics to process information in ways ordinary computers…

Ball Lightning

Ball lightning is a reported phenomenon in which a glowing, floating sphere of light appears, usually during thunderstorms. Many people claim to have…

The Nature of Time

Time is one of the most familiar parts of our experience, yet what it really is remains one of the deepest and most contested questions in physics…

Fact· Historical

Isaac Newton

Isaac Newton (1642 to 1727) was an English mathematician and physicist, widely regarded as one of the greatest scientists who ever lived. His…

Radioactive Decay

Radioactive decay is the process by which unstable atomic nuclei spontaneously break down, releasing energy and particles and transforming into other…

The Bending of Starlight

The bending of starlight is the deflection of light by gravity, predicted by Einstein's general theory of relativity and confirmed during a solar…