« previous next »
« previous next »
 

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.

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?

Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Furchgott's discovery that endothelial cells produce a vasodilating substance. Furchgott's discovery that endothelial cells produce a vasodilating substance.
Prostate cancer. In this example, a large mass has grown into the urinary bladder. Prostate cancer i Prostate cancer. In this example, a large mass has grown into the urinary bladder. Prostate cancer i
Human embryonic stem cells stained with Tra-1-60 (green) - a stem cell marker and nestin (red), a ne Human embryonic stem cells stained with Tra-1-60 (green) - a stem cell marker and nestin (red), a ne
During World War I, advancing armies unloosed ferocious artillery barrages to destroy deeply entrenc During World War I, advancing armies unloosed ferocious artillery barrages to destroy deeply entrenc
The Excretory System Water and waste products from cells The Excretory System Water and waste products from cells
Staphylococcus aureus cells (yellow) stuck in mucus secreted by human nasal epithelial cells. Staphylococcus aureus cells (yellow) stuck in mucus secreted by human nasal epithelial cells.
Video: Natural Selection, Species Isolation and Real World Example

For a complete list of videos, visit our video library