« previous next »
« previous next »
 

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

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?

Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

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?

Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

The Structure of an Old High-Mass Star The Structure of an Old High-Mass Star
Some playgrounds near streets with heavy traffic may still have high levels of lead from gasoline ... Some playgrounds near streets with heavy traffic may still have high levels of lead from gasoline ...
Close-up view of a diaphragm amplifier on the left and a bell amplifier on the right Close-up view of a diaphragm amplifier on the left and a bell amplifier on the right
Using the fingertips of one hand, make contact with an area on the back with high fascial ... Using the fingertips of one hand, make contact with an area on the back with high fascial ...
A high-resolution model of the 50S ribosomal subunit A high-resolution model of the 50S ribosomal subunit
A concrete wall of a cold storage room measures 3.0 m high, 5.0 m wide, and 20 cm thick. The ... A concrete wall of a cold storage room measures 3.0 m high, 5.0 m wide, and 20 cm thick. The ...
Video: Type of Transport - Active and Passive Processes

For a complete list of videos, visit our video library