Air pollution associated with worsening emphysema, Common air pollutants were associated with increases in emphysema over a decade of follow-up. The results may help explain why some people who never smoked develop emphysema.

---

How brown fat improves metabolism Researchers gained key insights into brown fat’s effects on the body’s metabolism. The findings reveal targets for developing new treatments for obesity and diabetes.

---

Brain cells underlying stuttering identified in mice Gene mutations related to human stuttering also caused vocalization defects and a loss of brain cells called astrocytes in mice. The findings reveal insight into the neurological mechanisms.

---

Popular Stories

• Aspirin use may be widespread despite new guidelines
• High sugar intake worsens autoimmune disease in mice
• Enterovirus infection linked to acute flaccid myelitis
• Blood test may detect myalgic encephalomyelitis/chronic fatigue syndrome
• Calorie restriction may benefit healthy adults under 50