Selected article

Cryonics is the low-temperature preservation of humans and animals that can no longer be sustained by contemporary medicine until resuscitation may be possible in the future. Currently, human cryopreservation is not reversible, which means that it is not currently possible to bring people out of cryopreservation. The rationale for cryonics is that people who are dead by the current legal or medical definitions are not necessarily dead by the information-theoretic definition of death and that people could be brought out of cryopreservation in the future.

In the United States, cryonics can only be legally performed on humans after they have been pronounced legally dead.

The word cryonics is derived from the Greek word κρύος (kryos), meaning cold.

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Selected picture

Credit: Jessamyn West

A New York City Transit Authority subway token.

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Did you know...

• ... that both the Mozilla Firefox and Microsoft Internet Explorer web browser design ideas descended from the Mosaic web browser?

• ... that a coherer, hot wire barretter, electrolytic detector, cat's whisker and vacuum tube were all types of radio detectors?

• ... that in 2008 Hewlett-Packard created a prototype of the theoretical fourth and last passive circuit element, the memristor, that may one day revolutionize electronics, although the theory was devised in 1971?

• ... that a mercury arc rectifier converts alternating current to direct current by means of an electric arc through mercury vapor?

• ... that only one of the 266 1076 Class steam locomotives built for the Great Western Railway was named, and the rest had only numbers?

• ... that the six Charles Tayleur locomotives ordered by Isambard Kingdom Brunel for the Great Western Railway were unsuccessful?

• ... that the intensity of a tropical cyclone (pictured) is usually determined by the Dvorak technique using only visible and infrared satellite images?

• ... that the technique of double-balloon enteroscopy allows any position along the gastrointestinal tract to be visualized in real-time?

Lists of basic topics   (all)

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Main categories: Technology and Applied sciences

Agriculture & Agronomy • Architecture • Automation • Biotechnology • Blu-ray • Cartography • Chemical engineering • Communication (Media studies • Telecommunications) • Construction • Design • Digital divide • Earthquake engineering • Electronics • Energy • Ergonomics • Firefighting • Fire prevention • Forensics • Forestry • Industry • Information science • Information technology • Internet • Management • Manufacturing • Marketing • Medicine (Unsolved problems in neuroscience) • Metalworking • Microtechnology • Military science • Mining • Nanotechnology • Nuclear technology • Nutrition • Optics • Plumbing • Robotics • Sound technology • Space exploration • Technology forecasting • Tools

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Engineering:  Aerospace engineering • Bioengineering • Chemical engineering • Civil engineering • Electrical engineering • Environmental engineering • Materials science • Mechanical engineering • Nuclear technology • Software engineering • Structural engineering • Systems engineering

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Technology timelines

Topics   (all)

Glossaries   (all)

Air pollution dispersion terminology • Blogging • Broadcasting • Computing and IT (Alternative terms for free software • Computer • Fisheries • Fuel cell terms • Internet • Legal terms • Object-oriented programming • Unified Modeling Language) • Firefighting (Equipment • Wildland fires) • Library and information science • Machine vision • Metalworking terminology • Mill machinery • Nautical • Telephony • Textile manufacturing • Transport (Aviation, aerospace, and aeronautics • Automotive design • Rail (Passenger rail • NZ railfan • UK railfan • U.S. railfan) ) • Woodworking (Joinery) • Winemaking

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Technology and applied sciences

Agriculture • Agronomy • Architecture (Bridges, Portal) • Biotechnology • Electronics • Energy (Renewable energy) • Engineering • Hazardous Materials • Home improvement • Nanotechnology • Nuclear technology • Robotics

Information technology

Apple Inc. • Blu-ray • Computer networking (Internet (Forums)) • Computer science (Artificial intelligence) • Computer security (Cryptography) • Google • Microsoft • Java • Python programming • Software (Free software (Linux)) • Telecommunication • Typography

Transport

Aviation • Cars (Australian, Japanese) • Bicycles/Cycling • London transport • Nautical • Roads (U.S. Roads) • Spaceflight (Human spaceflight) • Trains (Rapid transit, UK Railways, UK Trams) • UK Waterways

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