« previous next »
« previous next »
 

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

Did you know?

Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

Did you know?

In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

Did you know?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Did you know?

Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.

Persian leopard (Panthera pardus ciscaucasica), also called Caucasian leopard Persian leopard (Panthera pardus ciscaucasica), also called Caucasian leopard
Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r
Earth’s history is divided into nested sets of time--eons, eras, periods, and epochs--and is called Earth’s history is divided into nested sets of time--eons, eras, periods, and epochs--and is called
Snap-ring pliers are also called lock-ring pliers, and they are designed to remove internal and ... Snap-ring pliers are also called lock-ring pliers, and they are designed to remove internal and ...
Cutaway Drawing of Tholos, The So-called Treasury of Atreus Cutaway Drawing of Tholos, The So-called Treasury of Atreus
Corbel Vault, Interior of Tholos, The So-called Treasury of Atreus Corbel Vault, Interior of Tholos, The So-called Treasury of Atreus
Video: Oral Hygiene & Braces Animation

For a complete list of videos, visit our video library