« previous next »
« previous next »
 

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?

There are more nerve cells in one human brain than there are stars in the Milky Way.

Did you know?

More than 4.4billion prescriptions were dispensed within the United States in 2016.

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?

Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

Acromegaly in one individual from a pair of identical twins. Acromegaly in one individual from a pair of identical twins.
Proportions of the genetic and physical maps are similar but not identical Proportions of the genetic and physical maps are similar but not identical
Monozygotic versus Dizygotic Twins Monozygotic versus Dizygotic Twins
MRI Scans of the Brains of Twins Discordant for Schizophrenia MRI Scans of the Brains of Twins Discordant for Schizophrenia
Share of Hours Worked by Education Level, 1940–2008 Share of Hours Worked by Education Level, 1940–2008
1.6 Organisms are made up of cells, each of which contains an identical set of genes. 1.6 Organisms are made up of cells, each of which contains an identical set of genes.
Video: Introduction to Sleep Apnea

For a complete list of videos, visit our video library