Ask unlimited questions for free
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.
For a complete list of videos, visit our video library