« previous next »
« previous next »
 

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

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?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

The patient is undergoing an allergy skin test by receiving subdermal inoculations of allergens. Inf The patient is undergoing an allergy skin test by receiving subdermal inoculations of allergens. Inf
Evidence for a Coincidence Detector in the Brain of a Barn Owl Evidence for a Coincidence Detector in the Brain of a Barn Owl
Battle scene from The Birth of a Nation, directed by D. W. Griffith. Battle scene from The Birth of a Nation, directed by D. W. Griffith.
William Cameron Menzies, Storyboard for the burning-of-Atlanta scene from Gone with the Wind. William Cameron Menzies, Storyboard for the burning-of-Atlanta scene from Gone with the Wind.
Reticulocytes are immature red cells that can be identified by a reticular (mesh-like) network of ... Reticulocytes are immature red cells that can be identified by a reticular (mesh-like) network of ...
Structure of a processed mRNA 5’ end Structure of a processed mRNA 5’ end
Video: Lactation and Breast Feeding

For a complete list of videos, visit our video library