« previous next »
« previous next »
 

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

Did you know?

Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

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?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Collapse of State Trooper Cave’s Roof Collapse of State Trooper Cave’s Roof
To search for the Native American family would be fruitless. There are rural, urban, single-parent, ... To search for the Native American family would be fruitless. There are rural, urban, single-parent, ...
How Urban Is Your State? The Rural-Urban Makeup of the United States How Urban Is Your State? The Rural-Urban Makeup of the United States
The Steady State of the Solow Model The Steady State of the Solow Model
Effect of Increasing the Investment Rate on the Steady State Effect of Increasing the Investment Rate on the Steady State
Conversion of F+ to an Hfr state occurs by integration of the F factor Conversion of F+ to an Hfr state occurs by integration of the F factor
Video: Chemical Synapse Animation

For a complete list of videos, visit our video library