« previous next »
« previous next »
 

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Did you know?

There are 20 feet of blood vessels in each square inch of human skin.

Did you know?

The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

Did you know?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Did you know?

Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

Phylogeny of modern seedless and seed plants showing critical innovations Phylogeny of modern seedless and seed plants showing critical innovations
Modern Corn Was Domesticated from the Wild Grass Teosinte Modern Corn Was Domesticated from the Wild Grass Teosinte
Drugs, Behavior, and Modern Society (8th Edition) Drugs, Behavior, and Modern Society (8th Edition)
Cutting Strip Loin Steaks (2 of 5) Cutting Strip Loin Steaks (2 of 5)
Modern door design Modern door design
The evolution of modern wheat The evolution of modern wheat
Video: Definition of heart rate

For a complete list of videos, visit our video library