| #9069, aired 2024-03-28 | SCIENCE $2,200 (Daily Double): Devised by a 19th century German scientist, this scale measures a mineral's resistance to abrasion Mohs hardness scale |
| #8926, aired 2023-09-11 | SCIENCE CLASS $400: Used as a common medical treatment in the 19th century, laudanum is a tincture of this narcotic dissolved in distilled spirits opium |
| #16, aired 2023-05-22 | A LIFE IN SCIENCE $1200: Mary Anning found many fossils in the 19th century, including this long-necked marine one sketched here plesiosaur |
| #8845, aired 2023-04-07 | SCIENCE $800: Some confused 19th century guy named all the mammals in an order these shrews even though relatively few of them are arboreal tree shrews |
| #8815, aired 2023-02-24 | I LIKE TO SCIENCE! $1000: He had a pretty good 19th century run, including saving France's beer, wine & silk industries Pasteur |
| #8795, aired 2023-01-27 | 19th CENTURY SCIENCE $400: In 1803 a British meteorologist published new names for these, including cumulus & cirrus clouds |
| #8795, aired 2023-01-27 | 19th CENTURY SCIENCE $800: In the 1870s a Swiss surgeon pioneered the surgical removal of this gland to treat goiter the thyroid |
| #8795, aired 2023-01-27 | 19th CENTURY SCIENCE $1200: Once thought to be a planet, the first asteroid was discovered in 1801 & named this after a Roman goddess Ceres |
| #8795, aired 2023-01-27 | 19th CENTURY SCIENCE $1600: In 1859 Charles Darwin explained his theory of evolution in an important work commonly shortened to this title On the Origin of Species |
| #8795, aired 2023-01-27 | 19th CENTURY SCIENCE $2,000 (Daily Double): An 1813 work called "Elementary Theory of Botany" introduced this field, the classification of organisms taxonomy |
| #7985, aired 2019-05-03 | GETTING ALL SCIENCE "E" $800: This branch of zoology that focuses on insects emerged as a distinct field of study in the early 19th century entomology |
| #7953, aired 2019-03-20 | SCI-FI SUBGENRES $800: Generally, steampunk science fiction is set in this century the 19th |
| #7949, aired 2019-03-14 | THAT'S MY MATH OR SCIENCE THING! $800: Here's our in-depth examination of cats and dogs in this diagram, named for a 19th-century English logician Venn |
| #7946, aired 2019-03-11 | CHANNEL SURFING $3,000 (Daily Double): Dusky dolphins surf this South American channel, named for a 19th century science ship the Beagle |
| #7869, aired 2018-11-22 | SOCIAL SCIENCE $400: In the 19th century Auguste Comte coined this "ology" for the study of human communities & institutions sociology |
| #7535, aired 2017-05-19 | ALTERNATIVE FACTS $2000: Here's a 19th century depiction of the practice of this science, proved to be utter malarkey phrenology |
| #7522, aired 2017-05-02 | SCIENCE & NATURE $200: In the 19th century the plant pest Phylloxera vitifoliae nearly wiped out this industry in France, Italy & Germany wine |
| #7124, aired 2015-07-30 | MEDICAL HISTORY $800: (Sarah of the Clue Crew reports from the Dittrick Medical History Center in Cleveland, OH.) 19th-century doctors thought that the brain shrank & grew with use, leaving corresponding contours on the skull, which were read to determine a person's abilities and traits, using the 3-D bust as a reference guide in this pseudo-science phrenology |
| #6725, aired 2013-12-06 | 19th CENTURY NOTABLES $1200: In 1875 she published the main text of her movement, "Science and Health with a Key to the Scriptures" Mary Baker Eddy |
| #6518, aired 2013-01-09 | SUPERSTARS OF SCIENCE $600: This 19th century chemist saved France's beer, wine & silk industries Pasteur |
| #6440, aired 2012-09-21 | IT'S THE MATH OR SCIENCE LAW $400: The second law of this 19th century botanist is the law of independent assortment (Gregor) Mendel |
| #6273, aired 2011-12-21 | PHYSICAL SCIENCE $800: In the 19th century a unit of conductance was named the "mho" in tribute to this man who studied current flow Ohm |
| #6112, aired 2011-03-22 | 19th CENTURY SCIENCE $200: Names for types of these, including cirrus & nimbus were coined in 1803 by British meteorologist Luke Howard clouds |
| #6112, aired 2011-03-22 | 19th CENTURY SCIENCE $600: In 1881 he immunized farm animals from anthrax in Pouilly-le-Fort, on the outskirts of Paris Pasteur |
| #6112, aired 2011-03-22 | 19th CENTURY SCIENCE $800: By 1880 both Edison & British physicist Joseph Wilson Swan had applied for patents on this type of electric lamp an incandescent light bulb |
| #6112, aired 2011-03-22 | 19th CENTURY SCIENCE $1,000 (Daily Double): Physician Robert
Graves described exophthalmic goiter, a condition now named for him, which affects this gland the thyroid |
| #6112, aired 2011-03-22 | 19th CENTURY SCIENCE $1000: Georg Grotefend bet some drinking companions that he could decipher this wedge-shaped system of writing, & did in 1802 cuneiform |
| #5871, aired 2010-03-08 | 19th CENTURY SCIENCE $200: In 1877 American astronomer Asaph Hall discovered Deimos & Phobos, 2 tiny moons of this planet Mars |
| #5871, aired 2010-03-08 | 19th CENTURY SCIENCE $400: Around 1820 it was demonstrated that this element was effective in treating goiter iodine |
| #5871, aired 2010-03-08 | 19th CENTURY SCIENCE $800: Developed in the 1860s & '70s, this first synthetic plastic would soon be used to make toiletries, dentures & film celluloid |
| #5871, aired 2010-03-08 | 19th CENTURY SCIENCE $1,000 (Daily Double): He was teaching at the University of Lille when he began his studies of fermentation (Louis) Pasteur |
| #5871, aired 2010-03-08 | 19th CENTURY SCIENCE $1000: The first skeletons of this early human were discovered in a French cave in 1868 Cro-Magnon |
| #5626, aired 2009-02-09 | SCIENCE A TO Z $1600: "M":
Named for a 19th century French doctor, it's a disease of the inner ear causing vertigo Ménière's disease |
| #5493, aired 2008-06-25 | "D" IN SCIENCE $2000: The atomic mass unit is also called this, after a 19th century British scientist the dalton |
| #4694, aired 2005-01-20 | SCIENCE GUYS $900 (Daily Double): In the 19th century Gerhard Hansen found out what causes this disease that goes back to Biblical times leprosy |
| #4517, aired 2004-04-06 | 19th CENTURY SCIENCE $200: Julius von Sachs found that starch was a product of this process in green plants photosynthesis |
| #4517, aired 2004-04-06 | 19th CENTURY SCIENCE $400: The name of this 1877 invention is from the Greek for "sound writing" phonograph |
| #4517, aired 2004-04-06 | 19th CENTURY SCIENCE $600: Using a piece of Iceland spar, a French physicist polarized this in 1808 light |
| #4517, aired 2004-04-06 | 19th CENTURY SCIENCE $800: In 1848 he set absolute zero at -273 degrees C.; it was found later that it is actually -273.16 degrees Lord Kelvin |
| #4517, aired 2004-04-06 | 19th CENTURY SCIENCE $1000: In 1815 William Prout hypothesized that this was the fundamental atom & all other atoms were made of it hydrogen |
| #4059, aired 2002-04-04 | 19th CENTURY SCIENCE & TECHNOLOGY $200: The year Bell founded the phone company, this man invented the phonograph Edison |
| #4059, aired 2002-04-04 | 19th CENTURY SCIENCE & TECHNOLOGY $400: Using a gear-toothed wheel & a mirror, Armand Fizeau measured the speed of this in 1849 light |
| #4059, aired 2002-04-04 | 19th CENTURY SCIENCE & TECHNOLOGY $600: Pierre Lallement's "Boneshaker" of 1865 was one of these vehicles a bicycle |
| #4059, aired 2002-04-04 | 19th CENTURY SCIENCE & TECHNOLOGY $800: In 1835 Rene Dutrochet discovered that chlorophyll was necessary for this process photosynthesis |
| #4059, aired 2002-04-04 | 19th CENTURY SCIENCE & TECHNOLOGY $1000: In 1803 the British army adopted the metal-scattering shell that this man invented back in 1784 Henry Shrapnel |
| #3390, aired 1999-05-07 | THE 19th CENTURY $500 (Daily Double): Charles Lyell's "Principles of" this science said processes that have changed the Earth continue to operate today Geology |
| #2827, aired 1996-12-10 | 19TH CENTURY SCIENCE $200: This element used in advertising signs was first separated from other inert gases in 1898 Neon |
| #2827, aired 1996-12-10 | 19TH CENTURY SCIENCE $400: He considered the nitroglycerin made by his family unsafe, so he invented dynamite Alfred Nobel |
| #2827, aired 1996-12-10 | 19TH CENTURY SCIENCE $600: Edison's 1876 carbon transmitter was invented to improve this device Telephone |
| #2827, aired 1996-12-10 | 19TH CENTURY SCIENCE $1,000 (Daily Double): 1883 saw the debut of alloy steel & 1884 this first synthetic fiber Rayon |
| #2827, aired 1996-12-10 | 19TH CENTURY SCIENCE $1000: Around 1850 he absolutely positively came up with the idea for an absolute temperature scale Lord Kelvin |
| #2628, aired 1996-01-24 | SCIENCE $500: Named after its 19th century inventor, this pendulum demonstrates the Earth's rotation Foucault's pendulum |
| #2490, aired 1995-06-02 | WRITING $400: 19th century French Abbe Hypolite Michon named this science of analyzing people from their writing graphology |
| #2339, aired 1994-11-03 | AGRICULTURE $1000: This science of growing plants without soil was developed in the mid-19th century hydroponics |
| #1383, aired 1990-09-12 | PHYSICAL SCIENCE $1,500 (Daily Double): 19th century British physicist William Thompson, who developed a temperature scale, was known by this name Lord Kelvin |
