The Anthropic Principle
The anthropic principle concerns the striking observation that the universe appears remarkably fine tuned for the existence of life. Many of the…
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Lightning
Lightning is a sudden, powerful discharge of electricity in the atmosphere, one of nature's most dramatic and dangerous phenomena. A single bolt can…
The Multiverse
The multiverse is the hypothesis that our universe is only one of many, perhaps even infinitely many, other universes. It is taken seriously by many…
Interpretations of Quantum Mechanics
Quantum mechanics is the most successful physical theory ever devised, predicting the behavior of atoms, light, and subatomic particles with…
Black Hole
A black hole is a region of space where gravity is so intense that nothing, not even light, can escape once it passes a certain boundary. They are…
Wormholes
A wormhole is a hypothetical tunnel through spacetime that could, in principle, connect two distant points in the universe, or even two different…
Conservation of Energy
The law of conservation of energy states that energy cannot be created or destroyed, only changed from one form into another. The total amount of…
Chaos Theory
Chaos theory is the branch of mathematics that studies systems whose behaviour is exquisitely sensitive to their starting conditions. Such systems…
The Atom
The atom is the basic building block of ordinary matter, the smallest unit of a chemical element that retains its properties. Everything you can see…
General Relativity
General relativity is Albert Einstein's theory of gravity, published in 1915. It reimagines gravity not as a force pulling objects together but as…
The Speed of Light
The speed of light in a vacuum is a fixed, fundamental constant of nature, equal to about 299,792 kilometres per second. It is the fastest speed at…
Albert Einstein
Albert Einstein was a German born theoretical physicist widely regarded as one of the greatest scientists of all time. Born in 1879 in Ulm, he…
Marie Curie
Marie Curie was a Polish born physicist and chemist who conducted pioneering research on radioactivity, a term she coined. Born Maria Skłodowska in…
Gravity
Gravity is the universal attractive interaction between masses, described at low energy by Newton's law of universal gravitation and at all energies…
The Luminiferous Aether
The luminiferous aether was a hypothetical substance once believed to fill all of space and to serve as the medium through which light waves…
Electricity
Electricity is the flow and presence of electric charge, one of the fundamental forces of nature and the power source of the modern world. From the…
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