(PhysOrg.com) -- This morning, mission controllers confirmed that ESA’s comet chaser Rosetta had swung by Earth at 8:45 CET as planned, skimming past our planet to pick up a gravitational boost for an epic journey to rendezvous ...
Space Exploration
Nov 13, 2009
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(PhysOrg.com) -- The Great Tit is an aggressive songbird found in Britain, continental Europe, parts of Northern Africa, and much of Asia. It is believed to survive mostly on seeds, nuts, fruit, insects, beetles, and spiders, ...
Global change is altering the physiology of the hibernation and behavior of bats, according to a study led by the University of Barcelona, carried out over 20 years. Given the milder winters in Spain, bats are accumulating ...
Plants & Animals
Mar 6, 2024
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Researchers have shed light on the molecular mechanisms underlying hibernation, publishing their findings today as a Reviewed Preprint in eLife.
Plants & Animals
Feb 20, 2024
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The internal clocks of grizzly bears appear to keep ticking through hibernation, according to a genetic study. This persistence highlights the strong role of circadian rhythms in the metabolism of many organisms including ...
Plants & Animals
Nov 16, 2023
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The extraordinary lifespans of bats could be under threat from rising global temperatures, according to new research published in Proceedings of the Royal Society B: Biological Sciences.
Plants & Animals
Oct 17, 2023
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Feeding honey to hibernating bears helped Washington State University researchers find the potential genetic keys to the bears' insulin control, an advance that could ultimately lead to a treatment for human diabetes.
Plants & Animals
Sep 21, 2022
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The most common bat in the United States, the big brown bat, boasts an unusually long lifespan of up to 19 years. A new study led by University of Maryland researchers identifies one of the secrets to this bat's exceptional ...
Plants & Animals
Aug 9, 2022
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Japanese scientists observed muscle gain in cultured human skeletal muscle cells infused with serum from hibernating black bears, confirming that unique factors activated in these creatures' blood during winter trigger their ...
Plants & Animals
Jul 18, 2022
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A trio of researchers, two with Universidad Austral de Chile, and one with Universidad Católica de Chile, has found that a gram of hibernating bat has a similar metabolism to a gram of hibernating bear. In their paper published ...
Hibernation is a state of inactivity and metabolic depression in animals, characterized by lower body temperature, slower breathing, and lower metabolic rate. Hibernating animals conserve food, especially during winter when food supplies are limited, tapping energy reserves, body fat, at a slow rate. It is the animal's slowed metabolic rate which leads to a reduction in body temperature and not the other way around.
Hibernation may last several days or weeks depending on species, ambient temperature, time of year, and fur on the animal's body. The typical winter season for a hibernator is characterized by periods of hibernation interrupted by sporadic euthermic arousals wherein body temperature is restored to typical levels. There is a hypothesis that hibernators build a need for sleep during hibernation more slowly than normally, and must occasionally warm up in order to sleep. This has been supported by some evidence in the arctic ground squirrel.
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