Genes & Cells

Microscopic murderers caught dealing poison, fighting aging with hibernation and more in this week's news

Catching a natural killer in the act
Microscopic images of disease-fighting cells may one day help treat immune deficiency disorders. Jordan Orange of the Children’s Hospital of Philadelphia and colleagues used a superpowerful new microscope to watch how immune cells called natural killer cells feed a poison pill called a lytic granule to tumors or virus-infected cells.