« previous next »
« previous next »
 

Did you know?

It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

Did you know?

The human body produces and destroys 15 million blood cells every second.

Did you know?

Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

Did you know?

After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

Did you know?

Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

Continental drift Continental drift
Liu Bolin disappears into a shelf of pandas Liu Bolin disappears into a shelf of pandas
Continental Drift—An Early Idea Continental Drift—An Early Idea
In 2009, historian Woody Holton described how Abigail Adams shrewdly invested in the Continental Con In 2009, historian Woody Holton described how Abigail Adams shrewdly invested in the Continental Con
Ayles ice shelf before breakup Ayles ice shelf before breakup
Continental Drift: An Idea Before Its Time Continental Drift: An Idea Before Its Time
Video: How antibiotics works? 💊

For a complete list of videos, visit our video library