In this video segment adapted from NOVA scienceNOW, learn how scientists are hoping to better understand the biology of dinosaurs by studying the insides of fossil bones. Hear about the accidental discovery of dinosaur soft tissue by paleontologist Dr. Mary Schweitzer, and how this tissue enables sc
How Does A Polygraph Test Work?
In this video excerpt from NOVA scienceNOW, learn about polygraph tests and lie detection. Correspondent and New York Times technology columnist David Pogue commits a staged crime and undergoes a polygraph test to find out how it works. Lying can cause stress, which produces common physiological responses, such as an increased heart rate and sweating. Polygraph testing experts explain what the test measures, why the questions are reviewed in advance, and why the test doesn't always work. This video is available in both English and Spanish audio, along with corresponding closed captions. CREDITS: https://www.pbslearningmedia.org/credits/nvsn6.sci.tech.polygraph/ LICENSE: https://www.pbslearningmedia.org/help/full-license-for-section-3c-of-terms-of-use-download-and-share/
More videos by this producer
Learn how computer modeling indicates that supermassive black holes may exist at the centers of all galaxies in this video from NOVA: Black Hole Apocalypse. Use this resource to stimulate student curiosity about the structure of galaxies and to provide opportunities for students to develop and use m
Learn about in advances in powered exoskeletons—a kind of wearable robot—in this video adapted from NOVA scienceNOW. Correspondent and New York Times technology columnist David Pogue explores the development of sophisticated robots that can be integrated with the human body. The company Ekso Bionics