Humans
We summarize the week's scientific breakthroughs every Thursday.
- Health & Medicine
Sperm with damaged DNA may cause some repeat miscarriages
An analysis of semen from men whose partners have experienced multiple miscarriages revealed abnormalities, a small study finds.
- Health & Medicine
A single sweaty workout may boost some people’s memory
Memory improvements after a short bout of exercise mirrored those seen after months of training.
- Health & Medicine
Edibles are tied to more severe health issues than smoking marijuana
Most marijuana-linked cases at a Denver hospital involved weed smokers. But people who ate the drug were more likely to have heart or psych issues.
- Health & Medicine
Signs of new nerve cells spotted in adult brains
A study finds new evidence that adult brains grow new nerve cells, even the brain of an octogenarian.
- Neuroscience
Women have a new weapon against postpartum depression, but it’s costly
The newly approved drug brexanolone simulates a natural hormone to alleviate symptoms of postpartum depression.
- Health & Medicine
U.S. fentanyl deaths are rising fastest among African-Americans
New statistics on fentanyl-related overdoses show troubling increases in deaths among African-Americans, Hispanics and men.
- Archaeology
The oldest known astrolabe was used on one of Vasco da Gama’s ships
A navigational device for taking altitudes at sea was found in a Portuguese shipwreck in the Arabian Sea and dates back to 1496.
- Health & Medicine
Saving monkey testicle tissue before puberty hints at a new way to preserve fertility
Frozen testicle tissue samples from prepubescent monkeys transplanted back onto those monkeys once they matured produced sperm.
- Health & Medicine
A new ketamine-based antidepressant raises hope — and questions
Little is known about the long-term effects on people of a newly approved antidepressant based on the anesthetic ketamine.
- Science & Society
The learning gap between rich and poor students hasn’t changed in decades
The educational achievement gap between the poorest and richest U.S. students remains as wide as it was almost 50 years ago.
- Health & Medicine
U.S. heart attack mortality reached a two-decade low in 2014
Deaths within 30 days of a heart attack have declined from 20 percent in 1995 to 12.4 percent in 2014, according to an analysis of Medicare patient data.
- Humans
The rise of farming altered our bite and changed how people talk
Eating soft, processed foods refashioned adults' jaws, which added “f” and “v” sounds to speech and changed languages worldwide, a study finds.
