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  2. Heterothermy - Wikipedia

    en.wikipedia.org/wiki/Heterothermy

    Heterothermy or heterothermia (from Greek ἕτερος heteros "other" and θέρμη thermē "heat") is a physiological term for animals that vary between self-regulating their body temperature, and allowing the surrounding environment to affect it.

  3. List of time periods - Wikipedia

    en.wikipedia.org/wiki/List_of_time_periods

    Ancient history – Aggregate of past events from the beginning of recorded human history and extending as far as the Early Middle Ages or the Postclassical Era. The span of recorded history is roughly five thousand years, beginning with the earliest linguistic records in the third millennium BC in Mesopotamia and Egypt .

  4. Wikipedia - Wikipedia

    en.wikipedia.org/wiki/Wikipedia

    Wikipedia [c] is a free-content online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the wiki ...

  5. Heat death paradox - Wikipedia

    en.wikipedia.org/wiki/Heat_death_paradox

    The heat death paradox, also known as thermodynamic paradox, Clausius' paradox, and Kelvin's paradox, [1] is a reductio ad absurdum argument that uses thermodynamics to show the impossibility of an infinitely old universe.

  6. History - Wikipedia

    en.wikipedia.org/wiki/History

    History (derived from Ancient Greek ἱστορία (historía) 'inquiry; knowledge acquired by investigation') [1] is the systematic study and documentation of the human past. [2] [3] History is an academic discipline which uses a narrative to describe, examine, question, and analyze past events, and investigate their patterns of cause and effect.

  7. List of weather records - Wikipedia

    en.wikipedia.org/wiki/List_of_weather_records

    This page lists various weather records from around the world, including temperature extremes, precipitation records, and other meteorological phenomena.

  8. Second law of thermodynamics - Wikipedia

    en.wikipedia.org/wiki/Second_law_of_thermodynamics

    The second law of thermodynamics is a physical law based on universal empirical observation concerning heat and energy interconversions.A simple statement of the law is that heat always flows spontaneously from hotter to colder regions of matter (or 'downhill' in terms of the temperature gradient).

  9. History of thermodynamics - Wikipedia

    en.wikipedia.org/wiki/History_of_thermodynamics

    The history of thermodynamics is a fundamental strand in the history of physics, the history of chemistry, and the history of science in general. Due to the relevance of thermodynamics in much of science and technology, its history is finely woven with the developments of classical mechanics, quantum mechanics, magnetism, and chemical kinetics, to more distant applied fields such as ...