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  2. Behavioral sink - Wikipedia

    en.wikipedia.org/wiki/Behavioral_sink

    In his most famous experiment in the series, "Universe 25", [11] population peaked at 2,200 mice even though the habitat was built to tolerate a total population of 4000. Having reached a level of high population density, the mice began exhibiting a variety of abnormal, often destructive, behaviors including refusal to engage in courtship, and ...

  3. John B. Calhoun - Wikipedia

    en.wikipedia.org/wiki/John_B._Calhoun

    The last surviving birth was on day 600, bringing the total population to a mere 2200 mice, even though the experiment setup allowed for as many as 3840 mice in terms of nesting space. This period between day 315 and day 600 saw a breakdown in social structure and in normal social behavior.

  4. Behavioural despair test - Wikipedia

    en.wikipedia.org/wiki/Behavioural_despair_test

    The behavioural despair test (or Porsolt forced swimming test) is a test, centered on a rodent's response to the threat of drowning, whose result has been interpreted as measuring susceptibility to negative mood.

  5. Dye in Doritos used in experiment that, like a 'magic trick ...

    www.aol.com/dye-doritos-used-experiment-magic...

    Researchers at Stanford University detail, in the Sept. 6 issue of the journal Science, how they were able to see through the skin of live mice by applying a mixture of water and tartrazine, a ...

  6. Animal testing on rodents - Wikipedia

    en.wikipedia.org/wiki/Animal_testing_on_rodents

    Rodents have been employed in biomedical experimentation from the 1650s. [1] Rodent studies up to the early 19th century were mainly physiological or toxicological.The first rodent behavioral study was carried out in 1822, a purely observational study [2], while quantitative rodent behavioral testing began in the late 19th century [1] [2].

  7. The Globe Just Experienced Its Warmest January On Record ...

    www.aol.com/news/globe-just-experienced-warmest...

    For a huge chunk of the U.S., you may have thought it couldn’t get much colder during the last month, but Earth as a whole just experienced its warmest January on record, according to a new ...

  8. Measles cases are rising in the US as Texas outbreak ... - AOL

    www.aol.com/news/measles-cases-rising-us-texas...

    Texas state health officials confirmed 24 cases of measles, as New Mexico announced its first case this year in a county on the state border.

  9. Tryon's Rat Experiment - Wikipedia

    en.wikipedia.org/wiki/Tryon's_Rat_Experiment

    He initiated the experiment by exposing a genetically diverse group of rats to the maze, labeling those who made the fewest errors “bright”, and those with the most errors “dull”. Tryon then mated the “bright” males with “bright” females, and “dull” males with “dull” females.