Ask unlimited questions for free
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
More than 4.4billion prescriptions were dispensed within the United States in 2016.
People about to have surgery must tell their health care providers about all supplements they take.
Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.
Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
For a complete list of videos, visit our video library