Search results

E-commerce (electronic commerce) is the activity of electronically buying or selling products on online services or over the Internet. E-commerce draws...

British Airways plc (BA) is the flag carrier airline of the United Kingdom. It is headquartered in London, England, near its main hub at Heathrow Airport...

Radioactive decay (also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration) is the process by which an unstable...

Eucalyptus (/ˌjuːkəˈlɪptəs/) is a genus of more than 700 species of flowering plants in the family Myrtaceae. Most species of Eucalyptus are trees, often...

Cholesterol is the principal sterol of all higher animals, distributed in body tissues, especially the brain and spinal cord, and in animal fats and oils...

In probability theory and statistics, the Poisson distribution is a discrete probability distribution that expresses the probability of a given number...

A steroid is an organic compound with four fused rings (designated A, B, C, and D) arranged in a specific molecular configuration. Steroids have two principal...

Good summer thunderstorm The sound of a thunderstorm Problems playing this file? See media help. Spring thunderstorm in suburbs The sound of part of a...

A nuclear reactor is a device used to initiate and control a fission nuclear chain reaction or nuclear fusion reactions. Nuclear reactors are used at nuclear...

The Encyclopædia Britannica (Latin for 'British Encyclopædia') is a general knowledge English-language encyclopaedia. It has been published by Encyclopædia...

A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also...

Willows, also called sallows and osiers, of the genus Salix, comprise around 350 species (plus numerous hybrids) of typically deciduous trees and shrubs...

In biological phylogenetics, a clade (from Ancient Greek κλάδος (kládos) 'branch'), also known as a monophyletic group or natural group, is a grouping...

Déjà vu (/ˌdeɪʒɑː ˈv(j)uː/ DAY-zhah-VOO, -⁠VEW, French: [deʒa vy] ; "already seen") is the phenomenon of feeling as though one has lived through the present...

A lake is an often naturally occurring, relatively large and fixed body of water on the Earth's surface. It is localized in a basin or interconnected basins...

In the industrial design field of human–computer interaction, a user interface (UI) is the space where interactions between humans and machines occur....

Cassowaries (Tok Pisin: muruk, Indonesian: kasuari) are flightless birds of the genus Casuarius in the order Casuariiformes. They are classified as ratites:...

The Toyota Prius (/ˈpriːəs/ PREE-əss) (Japanese: トヨタ・プリウス, Hepburn: Toyota Puriusu) is a compact/small family liftback (supermini/subcompact sedan until...

Asparagus (Asparagus officinalis) is a perennial flowering plant species in the genus Asparagus native to Eurasia. Widely cultivated as a vegetable crop...

The red deer (Cervus elaphus) is one of the largest deer species. A male red deer is called a stag or hart, and a female is called a doe or hind. The red...