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Magazine
In the July 6 SN: Celebrating the 50th anniversary of Apollo 11, stone tool dates face scrutiny, ocean plastic goes deep, records of Inca taxation, erosion spurred plate tectonics and more.
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Medicaid expansion may help shrink health gaps between black and white babies
04/23/2019 - 11:05 Human Development, Science & SocietyBlack babies in the United States are twice as likely as white infants to be born at low birth weight, and 1.5 times as likely to be born prematurely. But states that expanded Medicaid health care coverage as part of the 2010 Affordable Care Act may be shrinking that racial health gap, a study finds.
Researchers analyzed birth certificate data in 18 states plus Washington, D.C., that had...
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News
The learning gap between rich and poor students hasn’t changed in decades
03/19/2019 - 10:11 Science & Society, Human DevelopmentThe average performance of the lowest income students in the United States lags about three to four years behind that of the highest income students — an achievement gap that has remained constant for more than four decades, a new study finds.
An analysis of standardized tests given to more than 2.7 million middle and high school students over almost 50 years suggests that federal...
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Why it’s key to identify preschoolers with anxiety and depression
02/03/2019 - 07:00 Human Development, Mental Health, PsychologyThe task was designed to scare the kids. One by one, adults guided children, ranging in age from 3 to 7, into a dimly lit room containing a mysterious covered mound. To build anticipation, the adults intoned, “I have something in here to show you,” or “Let’s be quiet so it doesn’t wake up.” The adult then uncovered the mound — revealed to be a terrarium — and pulled out a realistic looking...
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An ancient child from East Asia grew teeth like a modern human
01/16/2019 - 14:12 Anthropology, Human Evolution, Human DevelopmentAn ancient child with a mysterious evolutionary background represents the oldest known case of humanlike tooth growth in East Asia, researchers say.
The child’s fossilized upper jaw contains seven teeth that were in the process of developing when the roughly 6½-year-old youngster died at least 104,000 years ago and possibly more than 200,000 years ago. Using X-rays to examine the teeth’s...
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Pregnant women’s use of opioids is on the rise
08/09/2018 - 16:00 Health, Human DevelopmentPregnant women aren’t immune to the escalating opioid epidemic.
Data on hospital deliveries in 28 U.S. states shows the rate of opioid use among pregnant women has quadrupled, from 1.5 per 1,000 women in 1999 to 6.5 per 1,000 women in 2014, the U.S. Centers for Disease Control and Prevention reports.
The highest increases in opioid use among pregnant women were in Maine, New Mexico...
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Human brains make new nerve cells — and lots of them — well into old age
04/05/2018 - 14:50 Neuroscience, Human Development, CellsYour brain might make new nerve cells well into old age.
Healthy people in their 70s have just as many young nerve cells, or neurons, in a memory-related part of the brain as do teenagers and young adults, researchers report in the April 5 Cell Stem Cell. The discovery suggests that the hippocampus keeps generating new neurons throughout a person’s life.
The finding contradicts a...