As more parents opt out of vaccinating their kids, many preventable childhood illnesses are making a comeback.
But the medical and biotech communities are already responding.
Armadillos carry leprosy, and their range is spreading north.
Trump administration lifts a ban on research that could lead to a man-made pandemic.
Our antibiotics are losing their power to stop infection, but livestock farmers don’t want to stop using them.
Human bodies, prehistoric animals, lost treasure, and dormant, deadly diseases are about to be revealed.