The history of inventions.

0:00 5 Daily Trivia Questions, powered by AI. Hi, I'm Mark Ellison. Today's theme is the history of inventions, breakthrough ideas, accidental discoveries, and inventions that changed everyday life. Question 1. While working on wartime radar equipment, an engineer noticed a candy bar melt. When he stood near an active magnetron, that observation led to experiments with popcorn and eggs and, eventually, a brand new kitchen staple. Which household appliance was born from this accidental discovery? Question 2. Borrowed from a bacterial defense system, this tool uses a guide RNA to direct the Cas9 enzyme to precise DNA sites. allowing scientists to snip and edit genes with remarkable accuracy. What is the name of this breakthrough gene editing technology? Question 3. At New York's Crystal Palace in 1854, an inventor dramatically cut the hoisting rope of a platform he was standing on, only for it to halt safely thanks to his new mechanism. What invention made high-rise buildings practical... by making vertical travel safe for the public. Question 4. A 3M chemist developed a

1:34 surprisingly weak, pressure-sensitive adhesive that wouldn't stick permanently, seemingly a failed glue, until a colleague used it for removable bookmarks in a choir hymnal. Which ubiquitous office product did this serendipitous pairing create? Question 5. Developed at Bell Labs in 1947, this tiny semiconductor device supplanted bulky, fragile vacuum tubes and made possible the miniaturization of radios, computers, and eventually smartphones. What is this foundational building block of modern electronics? We'll be right back with these answers after this break. Welcome back!

2:27 Question 1. Which appliance came from a melted candy bar near a radar magnetron? Answer. The microwave oven. Percy Spencer at Raytheon realized microwaves could heat food after his candy bar melted. The company's first commercial units were called Radar Ange, paving the way for compact home microwaves decades later. Question 2. What gene editing system uses guide RNA and Key S9? Answer. CRISPR-Cas9. Jennifer Doudna and Emmanuelle Charpentier showed in 2012 how CRISPR-Cas9 could be programmed to cut DNA at chosen sequences. Their work revolutionized genetics and earned them the 2020 Nobel Prize in Chemistry. Question 3. Which invention's 1854 rope-cut demo made skyscrapers feasible? Answer. The safety elevator. Elisha Otis' safety brake prevented elevator cars from plunging if the cable snapped. Public confidence in safe elevators enabled taller buildings and modern urban skylines.

3:29 Question 4. Which product arose from 3M' s low-tack, failed adhesive? Answer, post-it notes. Spencer Silver created the low-tack adhesive, and Art Fry applied it to paper notes that could be repositioned without residue. Launched nationally in 1980, post-it notes became a staple of offices and classrooms. Question 5. What component replaced vacuum tubes and enabled microelectronics? Answer. The transistor. Invented by John Bardeen, Walter Bratton, and William Shockley, the transistor amplifies and switches electronic signals. Its mass production on silicon chips sparked the computer age and earned the trio the 1956 Nobel Prize in Physics. That concludes today's five daily trivia questions.

4:16 I'm Mark Ellison. And today's questions were crafted with the help of AI technology. See you tomorrow.