Experimenters Poppy and Sugar visit Nina in her workshop and discover that the foundations for floating houses need to be built in a special way. Next, they visit some real floating houses in Ijburg in the Netherlands to find out how really heavy things can float. Finally, they do an experiment that explains why floating houses stay steady in the water.

Metals have had such an impact on civilization that we name some eras for the discovery of specific metals: the Bronze Age and the Iron Age. In this program, learn about the characteristic and properties of metals, as well as the appearance of metals throughout history. We’ll explore prehistory; metals and tools; the first metals to be discovered; advantages of metal as compared to stone, wood, and bone; pure metals; alloys; heavy metals; iron;...

Airports implemented full body scanners as a security measure. This video identifiesthe three companies that manufacture commercial full body scanners, the two types of scanners, and how the scanners work.

14-year-old Zoë is an acrobat. She lives with her parents in a Dutch circus and the aerial silks are her favorite discipline. She practices often. She climbs high into the silks which hang down from the top of the circus tent. Her favorite tricks are the ‘drops.’ Zoë wraps herself into the silk so that when she lets herself fall, the cloth catches her just above the ground. She falls because of gravity. Zoë wants to know more: how does gravity...

This program details the history of this dynamic medium from its modest beginnings. In 1949, cable meant television for locations that had very poor reception or were inaccessible to broadcast signals. By the mid-1970s, cable service began to expand rapidly due to the easing of government restrictions and the use of satellite transmissions. Fiber optics, new cable-ready TVs, and an explosion of programming by an ever-growing number of networks helped...

Nancy Pelosi, the Democratic leader of the U.S. House of Representatives, is considered the most powerful woman in American politics. Pelosi was the first female Speaker of the House and the first woman to be third in line for the presidency. Among her greatest accomplishments in government was the passage of the Affordable Care Act/Obama Care, providing millions of Americans access to medical insurance. She shares what it was like wielding such political...

Presents the original text of Shakespeare's play side by side with a modern version, with marginal notes and explanations and full descriptions of each character.

When her quirky grandmother goes to Hawaii for the summer, nine-year-old Ruby learns to survive on her own in Mississippi by writing letters, befriending chickens as well as the new girl in town, and finally coping with her grandfather's death.

Three blue-collar geniuses challenge each other with various puzzles and problems to determine who is The Smartest Guy in the Room. Terry and Guy must build self-propelling boats made of materials found on an ice cream truck. Randy competes head to head with them in a weights and measurements challenge.

Four English schoolchildren find their way through the back of a wardrobe into the magic land of Narnia and assist Aslan, the golden lion, to triumph over the White Witch, who has cursed the land with eternal winter.