« previous next »
« previous next »
 

Did you know?

As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

Did you know?

People about to have surgery must tell their health care providers about all supplements they take.

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.

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

Formation of additional eyes in Drosophila caused by the abnormal expression of a master control gen Formation of additional eyes in Drosophila caused by the abnormal expression of a master control gen
Genetic control of eye evolution. Genetic control of eye evolution.
Prenatal development in humans. Prenatal development in humans.
(A) Female head louse. (Courtesy of the Centers for Disease Control and Prevention/ Dr. Dennis ... (A) Female head louse. (Courtesy of the Centers for Disease Control and Prevention/ Dr. Dennis ...
Tornado Formation: Nonsupercell Tornado Development Tornado Formation: Nonsupercell Tornado Development
Let f be a real function with domain R. Suppose that for each ǫ > 0, there is a continuous ... Let f be a real function with domain R. Suppose that for each ǫ > 0, there is a continuous ...
Video: How Hemoglobin Picks Up and Delivers Oxygen

For a complete list of videos, visit our video library