All articles tagged with #thermoregulation
The naked mole-rat, a mammal native to East Africa, exhibits unique characteristics such as eusocial behavior and remarkable cancer resistance, and it thermoregulates in a manner similar to cold-blooded animals by relying on external heat sources and behavioral adaptations, challenging traditional classifications of mammals as strictly warm-blooded.
Research shows that women tend to prefer warmer environments while men prefer cooler ones, with women being more sensitive to cold due to factors such as smaller body size, lower metabolic rate, and lower skin temperature. Hormonal changes, medical conditions, and other factors can also influence temperature sensitivity. Studies on birds and bats suggest that sex-related temperature preferences may have evolved to reduce resource competition and protect offspring.
Researchers led by Ziyuan Wang have developed a flexible, solar-powered device that can be integrated into clothing to regulate body temperature by heating or cooling the skin. The device combines a solar cell with an electrocaloric material, which changes temperature when exposed to an electric field. It operates continuously for 24 hours, recharges with sunlight, and can switch between heating and cooling modes. This innovation could be particularly beneficial for people working in extreme environments and astronauts in space.
As temperatures rise due to climate change, animals are employing various tactics to beat the heat. Some species, like squirrels, engage in "splooting" or "heat dumping" by spreading out on cooler surfaces. Others are evolving different body shapes, such as larger beaks, legs, and ears, to better regulate their body temperatures. Red kangaroos use saliva to lower their body temperature, while echidnas blow snot bubbles to cool their blood. Storks excrete liquid onto their legs, and birds like pelicans and cormorants use "gular fluttering" to cause evaporation. Understanding these heat regulation methods can help predict how animals will respond to climate change.
A large-scale animal study has found a correlation between brain size and the duration of yawning in vertebrates. The study collected data on 1,291 yawns from 55 mammal species and 46 bird species and found that animals with larger brains and more neurons tend to have longer-lasting yawns. The researchers suggest that yawning is an essential way of cooling down the brain, and bigger brains need longer yawns to properly cool them. The study could fill in some of the gaps in our knowledge about yawning, including why it happens in the first place and why animals such as giraffes have no need to bother with yawning at all.