« previous next »
« previous next »
 

Did you know?

About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

Did you know?

Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.

Did you know?

Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

Did you know?

The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

Did you know?

More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

Mount Logan, Yukon. Environmental conditions and organisms vary greatly from low to high elevations Mount Logan, Yukon. Environmental conditions and organisms vary greatly from low to high elevations
Areas of differing productivity and diversity in a wetland. (a) Typha dominates core habitats, while Areas of differing productivity and diversity in a wetland. (a) Typha dominates core habitats, while
Estimated terrestrial net primary productivity across Canada. Estimated terrestrial net primary productivity across Canada.
HIV-positive men with a high number of life stressors progress more quickly to AIDS than those with ... HIV-positive men with a high number of life stressors progress more quickly to AIDS than those with ...
Latitude versus Agricultural GDP per Agricultural Worker Latitude versus Agricultural GDP per Agricultural Worker
Ratio of College Wages to High-School Wages Ratio of College Wages to High-School Wages
Video: Factors that affect conduction rates (myelination, axon diameter & temperature)

For a complete list of videos, visit our video library