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Human sexuality is the way people experience and express themselves sexually. This involves biological, psychological, physical, erotic, emotional, social...

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...

Immortality is the concept of eternal life. Some species possess 'biological immortality' due to an apparent lack of the Hayflick limit. Some scientists...

A flight attendant, traditionally known as a steward (MASC) or stewardess (FEM); or air host (MASC) or hostess (FEM), is a member of the aircrew aboard...

The fuselage (/ˈfjuːzəlɑːʒ/; from the French fuselé "spindle-shaped") is an aircraft's main body section. It holds crew, passengers, or cargo. In single-engine...

Louis Victor Pierre Raymond, 7th Duc de Broglie (/də ˈbroʊɡli/, also US: /də broʊˈɡliː, də ˈbrɔɪ/, French: [də bʁɔj] or [də bʁœj] ; 15 August 1892 – 19...

ISO 639 is a standard by the International Organization for Standardization (ISO) concerned with representation of languages and language groups. It currently...

Records and firsts in spaceflight are broadly divided into crewed and uncrewed categories. Records involving animal spaceflight have also been noted in...

Registry of Toxic Effects of Chemical Substances (RTECS) is a database of toxicity information compiled from the open scientific literature without reference...

The Igbo calendar (Igbo: Ògụ́àfọ̀ Ị̀gbò[citation needed]) is the traditional calendar system of the Igbo people from present-day Nigeria. The calendar...

An ascus (from Ancient Greek ἀσκός (askós) 'skin bag, wineskin'; pl.: asci) is the sexual spore-bearing cell produced in ascomycete fungi. Each ascus usually...

Paraldehyde is the cyclic trimer of acetaldehyde molecules. Formally, it is a derivative of 1,3,5-trioxane, with a methyl group substituted for a hydrogen...

Friedrich August Kekulé, later Friedrich August Kekule von Stradonitz (/ˈkeɪkəleɪ/ KAY-kə-lay, German: [ˈfʁiːdʁɪç ˈʔaʊɡʊst ˈkeːkuleː fɔn ʃtʁaˈdoːnɪts];...

Eluxadoline, sold under the brand names Viberzi and Truberzi, is a medication taken by mouth for the treatment of diarrhea and abdominal pain in individuals...

Child mortality is the death of children under the age of five. The child mortality rate (also under-five mortality rate) refers to the probability of...

A satellite navigation device, satnav device or satellite navigation receiver is a user equipment that uses one or more of several global navigation satellite...

Ethylbenzodioxolylbutanamine (EBDB; Ethyl-J) is a lesser-known entactogen, stimulant, and psychedelic. It is the N-ethyl analogue of benzodioxylbutanamine...

Dog anatomy comprises the anatomical study of the visible parts of the body of a domestic dog. Details of structures vary tremendously from breed to breed...

A detonator, sometimes called a blasting cap in the US, is a small sensitive device used to provoke a larger, more powerful but relatively insensitive...

The van der Waals radius, rw, of an atom is the radius of an imaginary hard sphere representing the distance of closest approach for another atom. It is...