Maslow's Hierarchy of Needs
Maslow's hierarchy of needs is a theory in psychology proposing that human motivations are arranged in levels, with basic needs that must be largely…
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Maslow's hierarchy of needs is a theory in psychology proposing that human motivations are arranged in levels, with basic needs that must be largely…
Chemical bonding is the theory of how atoms join together to form the molecules and materials that make up the world. The forces that hold atoms…
Punctuated equilibrium is a theory about the pace of evolution. It proposes that species tend to remain largely unchanged for long stretches of time,…
The theory of island biogeography explains how many species an island will hold, and why. Developed in the 1960s, it proposes that the number of…
Supply and demand is the foundational theory of how prices and quantities are set in a market economy. It holds that the price of a good settles at…
Quantum field theory is the framework that combines quantum mechanics with Einstein's special relativity to describe the fundamental particles of…
Comparative advantage is one of the foundational theories of economics. It explains why two parties, whether individuals, businesses, or whole…
Stellar nucleosynthesis is the theory explaining where the chemical elements come from. It holds that the stars are the furnaces in which almost all…
Cognitive dissonance is the psychological theory that people feel mental discomfort when they hold two clashing beliefs, or when their actions…
The nebular hypothesis is the accepted scientific theory of how the Sun and its planets formed. It holds that the entire Solar System condensed,…
Classical conditioning is the psychological theory describing how a neutral signal, through repeated association, can come to trigger an automatic…
Attachment theory is the psychological theory that human beings are born with a deep need to form close emotional bonds with a few caregivers, and…
The modern synthesis is the theory, developed in the first half of the twentieth century, that united Charles Darwin's idea of evolution by natural…
Operant conditioning is the psychological theory that behaviour is shaped by its consequences: actions followed by rewards become more likely, and…
The Standard Model is the theory that describes all the known elementary particles of matter and the forces that act between them, except for…
Crystallography is the science of crystals: how their atoms are arranged in orderly, repeating patterns, and how that hidden order gives crystals…
Topology is the branch of mathematics that studies the properties of shapes that survive stretching, bending, and twisting, but not tearing or…
Stellar evolution is the scientific account of how stars are born, live, and die over millions or billions of years. Though no one can watch a single…
The kinetic theory of gases explains the behaviour of gases as the result of countless tiny particles, atoms and molecules, in constant, rapid,…
Set theory is the branch of mathematics that studies collections of objects, called sets. Though it begins with an idea as simple as grouping things…