When scientists tried to find a rubber substitute for the US during WWII, they stumbled upon a product that would entertain children for generations. Silly Putty is silicone plastic “clay” sold in an egg-shaped plastic container and marketed as a children’s toy. As an inorganic polymer, it can pick up ink when pressed against a newspaper; the imprint can then be stretched in any direction. It also bounces, breaks, and “melts” into a puddle. What causes these unusual flow characteristics? Discuss
Source: The Free Dictionary
L. Frank Baum was an American journalist, playwright, and author. In 1900, he published his most famous work, The Wonderful Wizard of Oz, a story about a girl named Dorothy who is carried by a tornado to the magical land of Oz. Baum’s fame rests largely on his 14 stories of Oz, all of which emphasize the virtues of practicality, self-reliance, tolerance, and egalitarianism. In 1938, the story was made into an extraordinarily popular motion picture. Who played the role of Dorothy? 
Nursery Rhymes are generally brief, anonymously written songs or verses intended for children. Though these rhymes are thought to help develop vocabulary and counting skills, scholars have actually linked many of these rhymes to historic events. For example, some believe that “Pop Goes the Weasel” is about silk weavers bringing their shuttles or bobbins (known as “weasels”) to pawnbrokers to exchange for drinking money. What event does “Ring a Ring O’Roses” supposedly reference? 
Nacre, also known as mother-of-pearl, is the iridescent substance that forms the shell lining of some fresh-water and salt-water mollusks. Just like the pearl, it is a mantle tissue secretion and is composed of alternating layers of calcium carbonate and conchiolin. It serves to both smooth the shell and defend it against parasitic organisms and damaging debris. Its iridescent beauty makes it a popular ornamentation in jewelry, watches and guitar inlays. What other decorative uses does it have? 
Apple cider is a non-alcoholic drink made from pressing apples, and differs from conventional apple juice in its tart taste and cloudy appearance. It is made from a blend of apples, and each mill keeps its blend secret. Especially popular in the US and Canada, cider is typically best in late autumn. In the US, fermented apple cider is known as hard cider. Hot, or mulled, cider is a popular cider variation, and consists of heated cider and spices. What is the risk of drinking unpasteurized cider? 
Amyotrophic lateral sclerosis (ALS), better known as Lou Gehrig’s disease, is a degenerative disease that affects motor neurons in the brain and spinal cord, preventing them from sending impulses to the muscles. Though the intellect remains intact, the muscles soon atrophy, causing weakness, paralysis, and eventual death. National attention was brought to the disease when Lou Gehrig died of it in 1941. What percentage of ALS cases is hereditary? 
Arlo Guthrie, American folk singer and son of Woody Guthrie, is perhaps best known for his talking blues song “Alice’s Restaurant.” The song’s original recording lasts 18 minutes and 20 seconds, though Arlo has been know to lengthen the song to 45 minutes in concert. Based on an actual incident, the song was a scathing indictment of the Vietnam War draft. Arlo also appeared at the 1969 Woodstock Festival in Bethel, New York. What movie launched his acting career? 
André “the Giant” René Roussimoff was born in France and rose to fame as a pro wrestler. His stature was the result of pituitary gigantism, a hormonal disease. Conflicting reports exist as to his actual height; estimates range from 6 ft 10 in (208 cm) to 7ft 5 in (226 cm). His weight, also under dispute, has been billed as lying anywhere between 380 lb (172 kg) and 540 lb (245 kg). André played Fezzik in the movie The Princess Bride and later inspired Billy Crystal to write what film? 
Regardless of how you spell this sweet, deep-fried treat—doughnut or donut—its origins remain a mystery. Some claim that Dutch settlers brought it to North America. Others maintain that a Danish sea captain impaled a fried cake on a wheel spoke to free his hands during a storm and, thus, invented the doughnut’s hole. The two most common types are ring-shaped doughnuts and filled doughnuts, flattened spheres injected with a sweet filling. In what countries can you get a meat-filled doughnut? 
The Apple iPod, currently the world’s best-selling line of digital audio players, was unveiled in 2001 for the Mac, and in 2002 for Windows. iPods store and play songs in a variety of digital formats, including MP3, Apple Lossless, and AAC. The combination of sound quality, sleek design, and slick user interface, coupled with a bold marketing campaign, has made the iPod a hit. By the end of 2006, over 67 million iPods had been sold. What medical problem may be associated with prolonged iPod use?