Did you know?
People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.
Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
Did you know?
The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.
Did you know?
It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
Did you know?
About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.
A human pedigree containing inbreeding.
Foliage height diversity and bird species diversity (data from MacArthur and MacArthur 1961).
Killer Whale - Size comparison to an average human.
Before the advent of vaccinations and antibiotics, infectious diseases such as cholera were the scou
Chromosomal Translocations Associated with Human Cancers
The two circuits of the human cardiovascular system