« previous next »
« previous next »
 

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

Did you know?

The average office desk has 400 times more bacteria on it than a toilet.

Did you know?

A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

J. P. Morgan, the financial genius, staved off ruinous competition among steel firms by combining mo J. P. Morgan, the financial genius, staved off ruinous competition among steel firms by combining mo
U.S. Patents and Patents per Million Residents, 2010 U.S. Patents and Patents per Million Residents, 2010
Fathers engage in physical play with infants more often than mothers do Fathers engage in physical play with infants more often than mothers do
Parents who have higher levels of education encourage their children to be educated Parents who have higher levels of education encourage their children to be educated
In order to encourage Canadians to avoid cross border shopping, Walmart Canada is striving to ... In order to encourage Canadians to avoid cross border shopping, Walmart Canada is striving to ...
Competitive firms and maximization Competitive firms and maximization
Video: Bone processes - resorption and deposition, remodeling and response to stress in adult bones

For a complete list of videos, visit our video library