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Bill Nye presents a scientific--and sometimes humorous--perspective on cloning, discussing the biology and ethics of the practice, looking at how clones are created, and explaining the difference between therapeutic and reproductive cloning.

Host Bill Nye explores the question of whether extraterrestrial life exists, and looks at how scientists search for life in outer space.

Bill Nye the Science Guy answers questions about amphibians, and conducts an experiment that shows how water can transfer through the skin of an amphibian.

Bill Nye the Science Guy answers questions about comets and meteors and conducts an experiment that demonstrates the shape of an elliptical orbit.

Bill Nye the Science Guy answers questions about archaeology, and conducts an experiment that demonstrates what trash reveals about human behavior.

Bill Nye the Science Guy answers questions about caves, and conducts an experiment that demonstrates how stalagmites are formed.

Bill Nye the Science Guy answers questions about computers and conducts an experiment that shows how to determine the means by which a computer will organize information.

Examines how animals such as the millipede move around; and contains interactive glossaries and quizzes and Spanish translation.

Bill Nye the Science Guy answers questions about communication, and conducts an experiment that demonstrates how codes are created.

Bill Nye hosts a look at some of the most significant discoveries in the history of astronomy, from the observations of ancient Greek mathematicians, to late twentieth-century findings about gamma ray bursts, black holes, pulsars and quasars, and the acceleration of the universe.

Bill Nye hosts a look at the history of discovery in chemistry, discussing the effects of electricty on chemicals, chemical combinations, the periodic table of elements, fullerenes, synthetic hardened plastic, and other topics.

Bill Nye hosts a look at the history of discovery about the Earth, discussing the planet's interior and natural processes, plate tectonics, the geology of oceans and continents, the atmosphere, weather and climate, forms of radiation, and other topics.

Explains the history of paleontology, beginning at the site of an asteroid that may have caused the demise of the dinosaur.

Bill Nye hosts a discussion of genetics, explaining how scientists came to understand the rules of inheritance, discussing subsequent discoveries in the field including those related to DNA, and looking at how DNA sequences are used in forensic investigations.

Examines key advances in the history of medicine, discussing the importance of early discoveries in human anatomy and blood circulation, the development of anesthesia and x-rays, the science behind germ theory, and the impact of penicillin and antibiotics, and looking at diabetes, cancer, and AIDS, and their therapies.