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Katie's Secret: A Teacher Makes A Call

Related Article: Learn more about diseases from A to C.

In this segment, Katie's teacher calls Katie's mother's fiancé and tells him Katie is going to a support group.

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Life in a Drop of Water: Bacteria (0:38)

Bacteria are small but grow in great numbers. Other microorganisms feed on bacteria.

Life in a Drop of Water: Rotifer (0:40)

Rotifers are multicellular animals with rapidly beating hearts and cilia to draw in food. They usually stay anchored in one area, but can use food to move from place to place.

Katie's Secret: Facts About Child Sexual Abuse (0:38)

In this segment, a narrator provides statistics on the age and frequency of sexual abuse, encouraging victims always to tell someone.

Katie's Secret: Katie Tells Her Mother (1:19)

Katie, accompanied by several trustworthy adults, tells her mother about the problem at home in this segment.

Katie's Secret: Katie Joins a Support Group (5:08)

In this segment, a group of kids who have been sexually abused share stories. Katie finally shares her story.

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Exploring Time: Arrhythmia Test (2:45)

Arrhythmias are the most common cause of death in the United States. Learn more about how doctors are studying arrhythmia on the Science Channel's "Exploring Time."

History in the Making: Cholesterol (0:30)

Click here to learn more about the 1984 coronary primary prevention trial and its effect on our understanding of cholesterol.

Overcoming Eating Disorders: Obesity and Anorexia (55:29)

Part one of this program profiles Brad Ryan, who undergoes gastric bypass surgery after spending the majority of his life obese. Part two explores anorexia.

Eating Disorders: Profiles of Pain (24:00)

Anorexia nervosa and bulimia nervosa are two of the most prevalent eating disorders. In this compelling documentary, female and male teens share their experiences with eating disorders.

Bulimia: Out of Control Eating (23:11)

This program explores the causes, symptoms, complications and treatment of the eating disorder bulimia. The video includes a stream-of-consciousness narrative by a young woman who has been binging and purging for more than eight years.

AIDS: The ABCs of HIV (3:13)

This clip takes a look at how a school is teaching students about HIV/AIDS and encouraging abstinence as the best way to prevent the disease from spreading.

AIDS: Researching a Vaccine (3:12)

In this segment, development of an HIV vaccine is discussed in terms of the gp41 protein that the HIV injects into a T-cell in order to implant itself. A molecule has been found that stops implantation from happening.

AIDS: The Crusade to Create a Vaccine (3:08)

Researchers are trying to develop a vaccine that prevents HIV infection. Learn more about HIV vaccine research in this video.

AIDS: Lisa Howard's Story (2:55)

This clip details Lisa Howard's HIV treatment. Lisa got married and had three HIV-negative children. She takes a combination of drugs called a cocktail that has reduced the amount of HIV and boosted her immune system.

AIDS: The Man Who Couldn't Catch AIDS (2:35)

Steve Crohn's blood is HIV-resistant. HIV does not fit into his T-cells, so they don't become infected.