Humans
- Health & Medicine
Six months in space causes 10 years’ worth of bone loss
Even a year after recovery back on Earth, astronauts who’d been in space six months or more still had bone loss equal to a decade of aging.
- Health & Medicine
Teen arm wrestlers face risk of an unusual elbow break
The pointy part of the inner elbow can break in arm wrestling, especially among teens whose bones are still growing.
- Animals
To test for COVID-19, a dog’s nose can match a nose swab
Dogs can sniff out COVID-19 cases as well as PCR tests can — and are better at ID’ing cases having no symptoms, a new study finds.
- Brain
Why teens can’t help tuning out mom’s voice
Teens often tune out what their mom is saying. Normal brain changes during adolescence could explain why, new research shows.
- Health & Medicine
Joggers run at an energy-efficient pace, new data show
Fitness trackers and treadmill tests show that a runner’s speed tends to vary little, regardless of the distance they run.
- Archaeology
Bright-colored feathers may have topped pterosaurs’ heads
Fossil remains of a flying reptile hint that their vibrant crests may have originated 250 million years ago in a common ancestor with dinosaurs.
- Archaeology
Scientists Say: Denisovan
The Denisovans were a recently discovered population of ancient hominids.
- Brain
Let’s learn about sleep
Sleep is key for health and wellbeing — but early school start times and screen time make it harder for teens to get shuteye.
- Archaeology
Muons reveal the inner worlds of pyramids, volcanoes and more
Tracking these subatomic particles can uncover surprising hidden structures.
- Animals
Scientists Say: Primate
Primates are mammals that tend to have big brains, forward-facing vision, fingernails and flexible hands and feet.
- Humans
Teen-designed tech could expand access for people with disabilities
Several inventors at the 2022 Regeneron ISEF competition offered creative solutions that translate sign language and help blind people navigate.
- Brain
Warning! Nicotine poses special risks to teens
Even a single dose of nicotine during early teen years can start a life-long cycle of nicotine use and addiction.
