« previous next »
« previous next »
 

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?

Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Results of selective breeding for oil content in corn plants. Results of selective breeding for oil content in corn plants.
Crossing Over Results in Genetic Recombination Crossing Over Results in Genetic Recombination
Yellow Pages Yellow Pages
Region of the Search for Extraterrestrial Intelligence Region of the Search for Extraterrestrial Intelligence
The enthalpy change for converting 10.0 g of ice at -25.0 C to water at 80.0 C is ________ kJ. ... The enthalpy change for converting 10.0 g of ice at -25.0 C to water at 80.0 C is ________ kJ. ...
The results of reciprocal crosses between streptomycin-resistant and streptomycin-sensitive The results of reciprocal crosses between streptomycin-resistant and streptomycin-sensitive
Video: Aneurysm

For a complete list of videos, visit our video library