DISEASE STICKS Microscopic evidence that long-distance travelers carried infectious diseases along Asia’s ancient Silk Road comes from cloth-capped sticks, such as these previously excavated at a 2,000-year-old latrine in north central China.
H.-Y. Yeh et al/Journal of Archaeological Science: Reports 2016
GIFT GIVER Star-shaped astrocytes (green) may donate mitochondria to nerve cells in distress, helping the brain escape damage from stroke and possibly other maladies, a new study suggests.
First potential cases of locally spread Zika crop up in the continental United States, estimates of infection risk, antibodies that can fight the virus and a new mosquito species that may be able to carry Zika.