https://www.smithsonianmag.com/smart-news/how-mouse-utopias-1960s-led-grim-predictions-humans-180954423/
These were all part of John Calhoun's experiments to study the effects of population density on behavior. ... The work also inspired the 1971 children's book Mrs. Frisby and the Rats of NIMH

https://www.snopes.com/articles/467034/universe-25-rodent-utopia-experiment/
Two years after the start of the experiment, the last baby of the colony was born. By 1973, he had killed the last mouse in the Universe 25. John Calhoun repeated the same experiment 25 more times

https://sciencehistory.org/stories/magazine/mouse-heaven-or-mouse-hell/
John Calhoun crouching inside Universe 25, his famous mouse-behavior experiment, February 1970. Officially, the colony was called the Mortality-Inhibiting Environment for Mice. Unofficially, it was called mouse heaven. Biologist John Calhoun built the colony at the National Institute of Mental Health in Maryland in 1968.

https://www.snopes.com/articles/466960/john-calhoun-universe-25/
By 1973, he had killed the last mouse in the Universe 25. John Calhoun repeated the same experiment 25 more times, and each time the result was the same. Calhoun's scientific work has been used as

https://www.atlasobscura.com/articles/the-doomed-mouse-utopia-that-inspired-the-rats-of-nimh
In 1973, Calhoun published his Universe 25 research as "Death Squared: The Explosive Growth and Demise of a Mouse Population." It is, to put it lightly, an intense academic reading experience.

https://en.wikipedia.org/wiki/Behavioral_sink
"Behavioral sink" is a term invented by ethologist John B. Calhoun to describe a collapse in behavior that can result from overpopulation.The term and concept derive from a series of over-population experiments Calhoun conducted on Norway rats between 1958 and 1962. In the experiments, Calhoun and his researchers created a series of "rat utopias" - enclosed spaces where rats were given

https://www.iflscience.com/universe-25-the-mouse-utopia-experiment-that-turned-into-an-apocalypse-60407
John B Calhoun set about creating a series of experiments that would essentially cater to every need of rodents, and then track the effect on the population over time. The most infamous of the

https://en.wikipedia.org/wiki/John_B._Calhoun
In the early 1960s, the National Institute of Mental Health (NIMH) acquired property in a rural area outside Poolesville, Maryland.The facility that was built on this property housed several research projects, including those headed by Calhoun. It was here that his most famous experiment, the mouse universes (the most famous of which is universe 25), was created.

https://www.the-scientist.com/universe-25-experiment-69941
Universe 25 Experiment Explained. In 1968, Calhoun had started the experiment by introducing four mouse couples into a specially designed pen—a veritable rodent Garden of Eden—with numerous "apartments," abundant nesting supplies, and unlimited food and water. The only scarce resource in this microcosm was physical space, and Calhoun

https://sciencehistory.org/stories/disappearing-pod/death-squared/
John Calhoun's colony was a mouse utopia—a giant pen with everything a mouse could ever desire: plenty of food and water, a perfect climate, and reams of paper to make cozy nests. But the thing is, this wasn't the first rodent heaven that Calhoun built. And by this point, he knew not to expect a happy ending.

https://suchscience.net/the-universe-25-experiment/
The Universe 25 experiment, led by American ethologist John B. Calhoun, is a landmark study that provides deep insights into the effects of overpopulation on social behavior and the functioning of a community. The prominent aspects of the findings include population growth leading to social decay, development of behavioral sinks leading to

https://historyofyesterday.com/universe-25-the-horrifying-study-that-predicted-human-extinction/
Calhoun was inside with the mice in 1971. (Source: Stan Wayman/ The life Picture) On the "Universe 25" experiment, which Calhoun repeated 25 times in various scales after years of method development, he saw unsettlingly consistent outcomes each time.These habitats have a straightforward design. Electric fences split the layout's ten-by fourteen-foot rectangle into four equally sized pieces.

https://exploringyourmind.com/universe-25-an-experiment-with-disturbing-conclusions/
The Universe 25 experiment. John Calhoun was an ethologist who worked for much of his life for the US National Institute of Mental Health. In the mid-20th century, overpopulation and overcrowding were of great concern to the scientific community. ... From rodent utopia to urban hell: population, pathology, and the crowded rats of NIMH.

https://www.sciencetimes.com/articles/45371/20230811/universe-25-experiment-mouse-utopia-project-turned-population-demise.htm
The Universe 25 is a series of experiments conducted in the 1960s and 1970s by American ethologist John B. Calhoun. Its goal is to understand the effects of overpopulation on the social behavior

https://das-wunder-aus-ungarn.eu/en/universe-25-john-calhouns-nimh-experiment/10101/
Two years after the start of the experiment, the last baby in the colony was born. By 1973 he had killed the last mouse in Universe 25. John Calhoun and repeated the same experiment 25 more times, each time producing the same result. Calhoun's academic work has been used as a model for interpreting social breakdown, and his research serves as a

https://www.thevoid.uk/void-post/universe-25-john-calhouns-nimh-experiment/
These experiments culminated in Universe 25; a mouse utopia which lasted 600 days and ended in the extinction of all inhabitants. The idea of 'Universe 25' came from the American scientist John Calhoun, who created an "ideal world" in which hundreds of mice would live and reproduce. More specifically, Calhoun built the so-called

https://www.texemarrs.com/012022/universe_25_experiment.htm
From 1954 to 1972, working with the National Institute of Mental Health (NIMH), Calhoun spent years trying to perfect his experiment with continual redesigns of his rodent cities, Universe 25, repeating it 25 times (thus the title Universe 25). In each experiment: Early on the mice, with no need to forage or build (no work), would initially

https://www.bitchute.com/video/qd1sg27AvTsX/
From the late 60's leading up to 1972, John B Calhoun conducted a series of experiments under the guidance of the National Institute of Mental Health (NIMH). In these experiments Calhoun observed rats and mice populations coping with various living situations and environments. In July 1968 four pairs of mice were introduced into the Utopian

https://rumble.com/v25xi42-universe-25-john-calhouns-nimh-experiment.html
By 1973, he had killed the last mouse in the Universe 25. John Calhoun repeated the same experiment 25 more times, and each time the result was the same. Calhoun's scientific work has been used as a model for interpreting social collapse, and his research serves as a focal point for the study of urban sociology.

https://calhouns.com/menus/
Menus . View menus by location. The Original. Food Menu; Drink Menu; Tennessee River. Food Menu; Deck Menu; Drink Menu

https://www.healthcare6.com/physician/knoxville-tn/john-t-foust-220649.html
Dr. John T Foust, MD, is a Hematology/Oncology specialist in Knoxville, Tennessee. He attended and graduated from University Of Tennessee College Of Medicine in 1985, having over 39 years of diverse experience, especially in Hematology/Oncology. He is affiliated with many hospitals including Fort Loudoun Medical Center, Fort Sanders Regional

https://www.sirved.com/restaurant/maryville-tennessee-usa/calhouns-in-maryville/378052/menus
Today, Calhoun's in Maryville is open from 11:00 AM to 10:00 PM. Whether you're curious about how busy the restaurant is or want to reserve a table, call ahead at (865) 984-9340. There's something for everyone at Calhoun's in Maryville, including vegetarian dietary options.

https://historicarchaeology.weebly.com/journal/john-ruppel-and-the-gatlinburg-mansion
This story has been punctuated by the well known arson fire in Gatlinburg, Tn (2016). John Ruppel Born 1918 in Wisconsin, Accused of helping with importation of 147,000 lbs of Marijuana from Columbia to Texas via five shrimping vessels named Monkey, Jubilee, Bayou Blues, and Agnes Pauline. Indicted two times and jury never reached a unanimous