CHOP scientists engineer personalized cartilage graft for infants with life-threatening airway narrowing
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Updates every hour. Last Updated: 28-Jun-2026 14:16 ET (28-Jun-2026 18:16 GMT/UTC)
UC San Diego biologists have uncovered new details about barrier-forming cells that protect and nourish the brain. Their findings focused on senescent cells, which traditionally have been labelled as “zombie” cells, and their formative role in the developing brain and beyond.
Some people might not mind spending time alone, but new research with data from 18 countries suggests that older people who struggle with loneliness — rather than strictly being alone — may experience a faster mental and physical decline.
The study, led by the University of California, Davis, used advanced statistical modeling to chart loneliness and social isolation as older adults move through stages of cognitive impairment and mortality. The results suggest that loneliness plays a much stronger role in cognitive impairment and shorter life spans than social isolation on its own.