Cell Differentiation

In this video segment from The Secret of Life school video, "Sex and the Single Gene" follow as a single fertilized egg cell divides, differentiates, and assembles into the tissues and organs of a new organism.

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Dance of Development

Watch the "dance" of development as a zebrafish egg divides and differentiates on its way to becoming an embryo in this interactive activity adapted from the Exploratorium.

The Embryo Takes Shape

This video segment from NOVA: "Life's Greatest Miracle" explores the developmental process of an embryo beginning just two weeks after fertilization.

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Endocrine Disruptor Hypothesis

Scientists discuss whether or not endocrine disrupting chemicals, which may cause birth defects and other health concerns, should be controlled in the absence of conclusive proof, in this video segment adapted from FRONTLINE: "Fooling with Nature."

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Epigenetics

In this video segment adapted from NOVA scienceNOW, learn how what you eat, drink, or smoke may affect the instructions your epigenomes send to your genes, and as a result, change how your DNA is expressed.

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Gene Control

The development of creatures that appear to have nothing in common is directed by a surprisingly small number of genes. In this video segment, learn about the power of master control genes. Footage from The Secret of Life: "Birth, Sex & Death."

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Genetic Tool Kit

The shared set of genes for body segments, possessed by all animals, are discussed in this video segment from Evolution: "Great Transformations."

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Muscles and Mitochondria

Students learn about the role of mitochondria in a cell's energy production.

On Human Cloning

Three cloning experts share their opinions in these interviews from the NOVA "18 Ways to Make a Baby." Web site.

The Potential Health Hazards of Vinyl Siding

Follow one family's investigation into the toxins generated through the production and disposal of vinyl siding, in this video segment adapted from Blue Vinyl.

Stem Cell Debate

This essay from the NOVA "Life's Greatest Miracle" Web site explores the debate over the use of embryonic stem cells in scientific research.

Stem Cell Research

Students learn how cell specialization takes place in vertebrate embryos, and analyze the different points of view in the stem cell debate.

Stem Cells Breakthrough

In this video segment adapted from NOVA scienceNOW, follow the scientific process that led to a revolutionary method for creating stem cells without the use of human embryos.

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Stem Cells: Seeds of Hope?

This video explores the basic scientific and ethical questions surrounding the use of stem cells in medical research.

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Therapeutic Uses of Stem Cells

This interactive activity adapted from the HHMI Outreach Program at Harvard University explores the many potential uses of stem cells to treat and cure disease.

West Nile Virus Outbreak in NYC

Learn how doctors in both the veterinary and human health fields unraveled the mystery of the deadly West Nile virus outbreak in New York City in this video segment adapted from Rx for Survival.