The scent of danger: A 70-year-old puzzle solved

The scent of danger: A 70-year-old puzzle solved - When injured, many freshwater fish release an alarm substance that triggers fear in other members of their school. This substance, which is found in skin, is thought to serve as a warning of the presence of predators. The Jesuthasan laboratory has molecularly characterized the alarm substance—"Schreckstoff"—in zebrafish. Ajay Mathuru and Suresh Jesuthasan describe the experiments that led to the finding that a type of glycan, chondroit