« previous next »
« previous next »
 

Did you know?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

Did you know?

Asthma cases in Americans are about 75% higher today than they were in 1980.

Did you know?

To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

Did you know?

More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

Did you know?

Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

Stages of Health Behavior Change Stages of Health Behavior Change
Risk-taking behavior by young males. Risk-taking behavior by young males.
Male Sexual Behavior Male Sexual Behavior
Alcohol, Mating, and Aggressive Behavior in Monkeys Alcohol, Mating, and Aggressive Behavior in Monkeys
B. F. Skinner documented how operant conditioning changes behavior. B. F. Skinner documented how operant conditioning changes behavior.
Sociologists study the social factors that underlie human behavior, the experiences that mold us, ... Sociologists study the social factors that underlie human behavior, the experiences that mold us, ...
Video: Polymerase chain reaction PCR - Animation

For a complete list of videos, visit our video library