Dr. Holly Hedrick attempts to remove a tumor from a fetus that is still attached to her mother.
The search for a cure for cancer, from the 1970s to targeted therapies in the 1990s, is examined.
Animation and input from experts shed light on how NASA's Kepler telescope identifies new planets.
Wild horses are romantic symbols of the American Old West, a memory that’s fading as this era subsides.
Examine the science behind vaccinations and the risks of opting out.