Big hair? Bald? How much difference your hair really makes to keep you cool or warm
We have millions of hair follicles on our body, including around 100,000 on our scalp.
Evolution
Jun 15, 2023
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News tagged with sweat glands
The chillest ape: How humans evolved a super-high cooling capacity
Humans have a uniquely high density of sweat glands embedded in their skin—10 times the density of chimpanzees and macaques. Now, researchers at Penn Medicine have discovered how this distinctive, hyper-cooling trait evolved ...
Evolution
Apr 14, 2021
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117
Skin deep: Aquatic skin adaptations of whales and hippos evolved independently
A new study shows that the similarly smooth, nearly hairless skin of whales and hippopotamuses evolved independently. The work suggests that their last common ancestor was likely a land-dwelling mammal, uprooting current ...
Plants & Animals
Apr 1, 2021
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294
New study suggests humans evolved to run on less water than our closest primate relatives
When you think about what separates humans from chimpanzees and other apes, you might think of our big brains, or the fact that we get around on two legs rather than four. But we have another distinguishing feature: water ...
Evolution
Mar 5, 2021
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Simple device monitors health using sweat
A device that monitors health conditions in the body using a person's sweat has been developed by Penn State and Xiangtan University researchers, according to Huanyu "Larry" Cheng, assistant professor of engineering science ...
Analytical Chemistry
Jun 23, 2020
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416
Forensic chemist detects marijuana-use based on sweat test
Forensic chemist Jan Halámek is proving that our own perspiration not only gives away how drunk we are—but if we are high, too.
Analytical Chemistry
Jan 6, 2020
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251
Mapping the inner workings of a living cell
Imaging tools like X-rays and MRI have revolutionized medicine by giving doctors a close up view of the brain and other vital organs in living, breathing people. Now, Columbia University researchers report a new way to zoom ...
Biochemistry
Aug 6, 2018
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201
Forensic chemist uses sweat to distinguish individuals at crime scene
An average square inch of skin contains 650 sweat glands. That means our bodies leave small amounts of sweat on everything we touch—whether we're making a phone call, eating supper or committing a crime.
Analytical Chemistry
May 4, 2018
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85
A membrane with nanoscale pores allows controlled sweat stimulant release
When people sweat, they unknowingly release a wide range of chemicals that can noninvasively inform clinicians on anything from stress hormone levels to glucose. But it's hard for researchers to glean this information—unless ...
General Physics
May 1, 2018
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Did last ice age affect breastfeeding in Native Americans?
The critical role that breast feeding plays in infant survival may have led, during the last ice age, to a common genetic mutation in East Asians and Native Americans that also, surprisingly, affects the shape of their teeth.
Evolution
Apr 23, 2018
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