Doctors think the chronic pain of "shoulder impingement" may arise from age-related tendon and muscle degeneration, or from a bone spur that can rub against a tendon.
Michele Constantini/Getty Images/PhotoAlto
The core of the RBT-3 reactor at the Research Institute of Atomic Reactors in Dimitrovgrad, Russia. Some scientists suspect the institute's work on medical isotopes might explain radioactivity detected over Europe.
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A farmer plows his field with an ox-pulled plow in China's Guangxi province. Archaeologists think that domesticated farm animals increased inequality in some ancient societies.
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A neolithic jar from Khramis Didi-Gora, Georgia. The country has long prided itself on its winemaking tradition. A new analysis of ancient Georgian jars confirms that tradition goes back 8,000 years.
Courtesy of the Georgian National Museum
Japanese Wagyu beef has a sweet, coconut-like aroma. Scientists found 16 compounds associated with the smell, 10 of which are newly associated with the meat.
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Patients with Type-1 diabetes don't have enough healthy islets of Langerhans cells — hormone-secreting cells of the pancreas. Granules inside these cells release insulin and other substances into the blood.
Steve Gschmeissner/Science Source
Monsoon rains flooded Mumbai in August 2017. Aedes aegypti mosquitoes can spread diseases like dengue fever. Drought has affected the health of Somalians.
(From left) Punit Paranjpe/AFP/Getty Images; Christophe Simon/AFP/Getty Images; Arif Hudaverdi Yaman/Anadolu Agency/Getty Images
Shankar Vedantam, NPR's social science correspondent and host of the Hidden Brain podcast, explains why some of us are really good at recognizing faces and others are not.
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