RED-LIGHT DISTRICT Levels of a brain reward compound increased in male fruit flies genetically engineered to ejaculate when exposed to red light when the insects were bathed in the rosy hue.
Avi Jacob/BIU microscopy unit
GUT WRENCHING Pathogen detectors built into food packaging could help curb the spread of foodborne illness.
THE WINNER IS… In mice, norovirus invades tuft cells (the two bright green spots) in the lining of the small intestine (left) and the colon (right). Other cells in the intestines that weren’t infected (blue) are also shown.