« previous next »
« previous next »
 

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Did you know?

The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

Did you know?

Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

Did you know?

The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

The Hartlaub's Duck (Pteronetta hartlaubii) is a dark chestnut-coloured duck of African forests The Hartlaub's Duck (Pteronetta hartlaubii) is a dark chestnut-coloured duck of African forests
Japanese Macaque washing her sweet potatoes in seawater on Koshima Island, Japan. Japanese Macaque washing her sweet potatoes in seawater on Koshima Island, Japan.
A farm family in Custer, Nebraska, in 1888, a region where Populist sentiment was strong. A farm family in Custer, Nebraska, in 1888, a region where Populist sentiment was strong.
Proteins play an important role in keeping your skin healthy and your nails strong Proteins play an important role in keeping your skin healthy and your nails strong
Dark Brown Eye Color Dark Brown Eye Color
Video: Properties of macromolecules (Explained with No Audio)

For a complete list of videos, visit our video library