Microbes
Globetrotting microbes in airplane sewage may spread antibiotic resistance
Along with harder-to-kill microbes, airplane sewage contains a diverse set of the genes that let bacteria evade antibiotics.
Life
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BrainSurprise! Exam scores benefit from months of regular sleep
Getting enough consistent, quality sleep accounted for nearly a fourth of the differences in students’ exam scores in class.
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MicrobesDrug-resistant germs kill some 35,000 Americans each year
The new mortality rate may be way low, some experts say. Also troubling are two new germs that have emerged as big and urgent threats.
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AnimalsWhales echolocate with big clicks and tiny amounts of air
Toothed whales may echolocate using bits of air that they recycle inside their heads to conserve both air and energy.
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GeneticsLike Magneto? Microcrystals give magnets superpower over living cells
New iron-rich protein crystals could help researchers better understand the nerve cells that control movement and sensation. All they need are magnets.
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BrainAs teens gain weight, they find high-fat foods less pleasurable
Teens who gained excess weight showed less activity in the brain’s reward center when viewing or tasting foods with lots of fat.
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LifeScientists Say: Nutrient
Nutrients provide living things, from bacteria to animals, with the energy and materials to grow. But too much of a nutrient can sometimes cause harm.
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TechDrones help scientists weigh whales at sea
Drone imagery lets scientists estimate a whale’s weight. And that may help monitor the health of these big mammals for conservation purposes.
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BrainSleep may jumpstart the brain’s power washing system
Waves of fluid wash into the human brain during sleep. That’s good. They just may help clean out toxic proteins.
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AnimalsScientists Say: Papillae
These small nubs stick out from a body part. They include things such as tongue bumps with taste buds and the structures under the skin that help grow hair.