« previous next »
« previous next »
 

Did you know?

Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

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?

Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.

Did you know?

Thyroid conditions may make getting pregnant impossible.

Cast of Isotelus rex, the largest known trilobite from the middle to upper Ordovician of North Ameri Cast of Isotelus rex, the largest known trilobite from the middle to upper Ordovician of North Ameri
Frederick Law Olmsted and Calvert Vaux, Central Park, New York City. Frederick Law Olmsted and Calvert Vaux, Central Park, New York City.
Parents around the world teach their children their religious beliefs and practices. This photo is ... Parents around the world teach their children their religious beliefs and practices. This photo is ...
Ten Leading Causes of Death in the World, 2011 Ten Leading Causes of Death in the World, 2011
Population growth in India, China, Africa, and other countries in the developing world Population growth in India, China, Africa, and other countries in the developing world
As the world’s population continues to grow, demands on limited resources for food production As the world’s population continues to grow, demands on limited resources for food production
Video: Baroreceptor Reflex

For a complete list of videos, visit our video library