« previous next »
« previous next »
 

Did you know?

Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

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 training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.

Did you know?

More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

Comparison of the branching air tubes in (a) an insect and (b) a mammal. Comparison of the branching air tubes in (a) an insect and (b) a mammal.
At breakfast, a middle-class husband sits absorbed in the newspaper and the public affairs of the da At breakfast, a middle-class husband sits absorbed in the newspaper and the public affairs of the da
About 78% of middle-aged adults (aged 40–59) have at least one living parent, and for over a third ... About 78% of middle-aged adults (aged 40–59) have at least one living parent, and for over a third ...
Number of positive, negative, and neutral images recalled by younger, middle-age, and older adults. ... Number of positive, negative, and neutral images recalled by younger, middle-age, and older adults. ...
Detonation is a secondary ignition of the air–fuel mixture. It is also called spark knock or ... Detonation is a secondary ignition of the air–fuel mixture. It is also called spark knock or ...
Some ignition coils are electrically connected, called married (top figure), whereas others use ... Some ignition coils are electrically connected, called married (top figure), whereas others use ...
Video: What are Strong & Weak Acids and How they're different?

For a complete list of videos, visit our video library