« previous next »
« previous next »
 

Did you know?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Species, subspecies, populations, and individuals. Species are reproductively isolated from one anot Species, subspecies, populations, and individuals. Species are reproductively isolated from one anot
Members of the Lemba ethnic group from southern Africa. Members of the Lemba ethnic group from southern Africa.
Changes in Time Spent with Family Members Changes in Time Spent with Family Members
A network allows all modules to communicate with other modules. A network allows all modules to communicate with other modules.
Members of Sierra Leonean Diaspora Community in London Members of Sierra Leonean Diaspora Community in London
Recently discovered members of the deep pelagic community Recently discovered members of the deep pelagic community
Video: Evolutionary tree of life Animation

For a complete list of videos, visit our video library