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  1. The physics of sperm vs. the physics of sperm whales - Aatish Bhatia

  2. Light waves, visible and invisible - Lucianne Walkowicz

  3. Bird migration, a perilous journey - Alyssa Klavans

  4. Disappearing frogs - Kerry M. Kriger

  5. Urbanization and the evolution of cities across 10,000 years - Vance Kite

  6. What are stem cells? - Craig A. Kohn

  7. What is love? - Brad Troeger

  8. A trip through space to calculate distance - Heather Tunnell

  9. Cicadas: The dormant army beneath your feet - Rose Eveleth

  10. The moon illusion - Andrew Vanden Heuvel

  11. Why do Americans and Canadians celebrate Labor Day? - Kenneth C. Davis

  12. Four ways to understand the Earth's age - Joshua M. Sneideman

  13. What is déjà vu? What is déjà vu? - Michael Molina

  14. The Higgs Field, explained - Don Lincoln

  15. Gravity and the human body - Jay Buckey

  16. Mysteries of vernacular: Bewilder - Jessica Oreck and Rachael Teel

  17. Shakespearean dating tips - Anthony John Peters

  18. Overcoming obstacles - Steven Claunch

  19. Defining hopes of preventing it - Daniel Garrie

  20. The Arctic vs. the Antarctic - Camille Seaman

  21. The science of macaroni salad: What's in a molecule? - Josh Kurz

  22. Should you trust your first impression? - Peter Mende-Siedlecki

  23. Who won the space race? - Jeff Steers

  24. A brief history of video games (Part I) - Safwat Saleem

  25. RNAi: Slicing, dicing and serving your cells - Alex Dainis

  26. Mysteries of vernacular: Keister - Jessica Oreck and Rachael Teel

  27. The true story of Sacajawea - Karen Mensing

  28. Why do we have to wear sunscreen? - Kevin P. Boyd

  29. Mysteries of vernacular: X-ray - Jessica Oreck and Rachael Teel

  30. The hidden meanings of yin and yang - John Bellaimey

  31. Mysteries of vernacular: Zero - Jessica Oreck and Rachael Teel

  32. The science of macaroni salad: What's in a mixture? - Josh Kurz

  33. What's the definition of comedy? Banana. - Addison Anderson

  34. How to take a great picture - Carolina Molinari

  35. Mysteries of vernacular: Sarcophagus - Jessica Oreck and Rachael Teel

  36. The terrors of sleep paralysis - Ami Angelowicz

  37. What's below the tip of the iceberg? - Camille Seaman

  38. If molecules were people... - George Zaidan and Charles Morton

  39. A rare, spectacular total eclipse of the sun - Andy Cohen

  40. A brief history of plural word...s - John McWhorter

  41. Making a TED-Ed Lesson: Two ways to animate slam poetry

  42. Mysteries of vernacular: Fizzle - Jessica Oreck and Rachael Teel

  43. How to read music - Tim Hansen

  44. Exploring other dimensions - Alex Rosenthal and George Zaidan

  45. Got seeds? Now add bleach, acid and sandpaper - Mary Koga

  46. What is dyslexia? - Kelli Sandman-Hurley

  47. Making a TED-Ed Lesson: Animating zombies

  48. Animation basics: The optical illusion of motion - TED-Ed

  49. Mysteries of vernacular: Jade - Jessica Oreck and Rachael Teel

  50. Da Vinci's Vitruvian Man of math - James Earle

  51. The infinite life of pi - Reynaldo Lopes

  52. Comma story - Terisa Folaron

  53. Myths and misconceptions about evolution - Alex Gendler

  54. Making a TED-Ed Lesson: Synesthesia and playing cards

  55. Mysteries of vernacular: Quarantine - Jessica Oreck and Rachael Teel

  56. What is an aurora? - Michael Molina

  57. Inside your computer - Bettina Bair

  58. If superpowers were real: Super strength - Joy Lin

  59. If superpowers were real: Super speed - Joy Lin

  60. If superpowers were real: Flight - Joy Lin

  61. If superpowers were real: Body mass - Joy Lin

  62. If superpowers were real: Immortality - Joy Lin

  63. If superpowers were real: Invisibility - Joy Lin

  64. If superpowers were real, which would you choose? - Joy Lin

  65. How to set the table - Anna Post

  66. Vermicomposting: How worms can reduce our waste - Matthew Ross

  67. Is there a center of the universe? - Marjee Chmiel and Trevor Owens

  68. How big is the ocean? - Scott Gass

  69. Mysteries of vernacular: Gorgeous - Jessica Oreck and Rachael Teel

  70. The greatest machine that never was - John Graham-Cumming

  71. Equality, sports, and Title IX - Erin Buzuvis and Kristine Newhall

  72. The game-changing amniotic egg - April Tucker

  73. Dissecting Botticelli's Adoration of the Magi - James Earle

  74. The punishable perils of plagiarism - Melissa Huseman D'Annunzio

  75. Mysteries of vernacular: Window - Jessica Oreck and Rachael Teel

  76. The contributions of female explorers - Courtney Stephens

  77. An exercise in time perception - Matt Danzico

  78. What color is Tuesday? Exploring synesthesia - Richard E. Cytowic

  79. Mysteries of vernacular: Dynamite - Jessica Oreck and Rachael Teel

  80. Mysteries of vernacular: Venom - Jessica Oreck and Rachael Teel

  81. Development of English drama - Mindy Ploeckelmann

  82. Tracking grizzly bears from space - David Laskin

  83. How do you decide where to go in a zombie apocalypse? - David Hunter

  84. Mining literature for deeper meanings - Amy E. Harter

  85. Gyotaku: The ancient Japanese art of printing fish - K. Erica Dodge

  86. What on Earth is spin? - Brian Jones

  87. Is space trying to kill us? - Ron Shaneyfelt

  88. Making a TED-Ed Lesson: Animation

  89. Making a TED-Ed Lesson: Creative process

  90. Making a TED-Ed Lesson: Concept and design

  91. Mysteries of vernacular: Inaugurate - Jessica Oreck

  92. Reasons for the seasons - Rebecca Kaplan

  93. What is fat? - George Zaidan

  94. Pruney fingers: A gripping story - Mark Changizi

  95. What's an algorithm? - David J. Malan

  96. Pros and cons of public opinion polls - Jason Robert Jaffe

  97. Animation basics: Homemade special effects - TED-Ed

  98. The brilliance of bioluminescence - Leslie Kenna

  99. Four sisters in Ancient Rome - Ray Laurence

  100. Biofuels and bioprospecting for beginners - Craig A. Kohn

  101. Mysteries of vernacular: Earwig - Jessica Oreck and Rachael Teel

  102. Historical role models - Amy Bissetta

  103. What happened to antimatter? - Rolf Landua

  104. The basics of the Higgs boson - Dave Barney and Steve Goldfarb

  105. Big Data - Tim Smith

  106. Dark matter: The matter we can't see - James Gillies

  107. How did feathers evolve? - Carl Zimmer

  108. Mysteries of vernacular: Tuxedo - Jessica Oreck

  109. How do you know whom to trust? - Ram Neta

  110. A host of heroes - April Gudenrath

  111. Pavlovian reactions aren't just for dogs - Benjamin N. Witts

  112. Making sense of how life fits together - Bobbi Seleski

  113. Mysteries of vernacular: Miniature - Jessica Oreck

  114. How does an atom-smashing particle accelerator work? - Don Lincoln

  115. Who invented writing? - Matthew Winkler

  116. What is Zeno's Dichotomy Paradox? - Colm Kelleher

  117. How is power divided in the United States government? - Belinda Stutzman

  118. What cameras see that our eyes don't - Bill Shribman

  119. The beginning of the universe, for beginners - Tom Whyntie

  120. Self-assembly: The power of organizing the unorganized - Skylar Tibbits

  121. Mysteries of vernacular: Noise - Jessica Oreck

  122. Mysteries of vernacular: Hearse - Jessica Oreck

  123. Mysteries of vernacular: Assassin - Jessica Oreck

  124. Networking for the networking averse - Lisa Green Chau

  125. Mysteries of vernacular: Pants - Jessica Oreck

  126. Who is Alexander von Humboldt? - George Mehler

  127. Mysteries of vernacular: Clue - Jessica Oreck

  128. The upside of isolated civilizations - Jason Shipinski

  129. Become a slam poet in five steps - Gayle Danley

  130. Euclid's puzzling parallel postulate - Jeff Dekofsky

  131. How farming planted seeds for the Internet - Patricia Russac

  132. The story behind the Boston Tea Party - Ben Labaree

  133. The infamous and ingenious Ho Chi Minh Trail - Cameron Paterson

  134. What is verbal irony? - Christopher Warner

  135. How Mendel's pea plants helped us understand genetics - Hortensia Jiménez Díaz

  136. The difference between classical and operant conditioning - Peggy Andover

  137. The simple story of photosynthesis and food - Amanda Ooten

  138. How to organize, add and multiply matrices - Bill Shillito

  139. Illuminating photography: From camera obscura to camera phone - Eva Timothy

  140. Insights into cell membranes via dish detergent - Ethan Perlstein

  141. Why are blue whales so enormous? - Asha de Vos

  142. Gridiron physics: Scalars and vectors - Michelle Buchanan

  143. Distorting Madonna in Medieval art - James Earle

  144. Inventing the American presidency - Kenneth C. Davis

  145. Fresh water scarcity: An introduction to the problem - Christiana Z. Peppard

  146. Inside OKCupid: The math of online dating - Christian Rudder

  147. Where we get our fresh water - Christiana Z. Peppard

  148. The historical audacity of the Louisiana Purchase - Judy Walton

  149. How did trains standardize time in the United States? - William Heuisler

  150. How polarity makes water behave strangely - Christina Kleinberg

  151. What if we could look inside human brains? - Moran Cerf

  152. Life of an astronaut - Jerry Carr

  153. In on a secret? That's dramatic irony - Christopher Warner

  154. Slowing down time (in writing & film) - Aaron Sitze

  155. Network theory - Marc Samet

  156. Is light a particle or a wave? - Colm Kelleher

  157. How to defeat a dragon with math - Garth Sundem

  158. Phenology and nature's shifting rhythms - Regina Brinker

  159. Activation energy: Kickstarting chemical reactions - Vance Kite

  160. How we see color - Colm Kelleher

  161. You are your microbes - Jessica Green and Karen Guillemin

  162. Conserving our spectacular, vulnerable coral reefs - Joshua Drew

  163. What is color? - Colm Kelleher

  164. Why is there a "b" in doubt? - Gina Cooke

  165. Situational irony: The opposite of what you think - Christopher Warner

  166. Solving the puzzle of the periodic table - Eric Rosado

  167. Inside a cartoonist's world - Liza Donnelly

  168. Radioactivity: Expect the unexpected - Steve Weatherell

  169. Pizza physics (New York-style) - Colm Kelleher

  170. How do cancer cells behave differently from healthy ones? - George Zaidan

  171. What makes a hero? - Matthew Winkler

  172. How does - Peter Bohacek

  173. How did English evolve? - Kate Gardoqui

  174. DNA: The book of you - Joe Hanson

  175. The genius of Mendeleev's periodic table - Lou Serico

  176. Three anti-social skills to improve your writing - Nadia Kalman

  177. Would you weigh less in an elevator? - Carol Hedden

  178. Birth of a nickname - John McWhorter

  179. Are Elvish, Klingon, Dothraki and Na'vi real languages? - John McWhorter

  180. Kabuki: The people's dramatic art - Amanda Mattes

  181. The most groundbreaking scientist you've never heard of - Addison Anderson

  182. Speech acts: Constative and performative - Colleen Glenney Boggs

  183. How art can help you analyze - Amy E. Herman

  184. Why extremophiles bode well for life beyond Earth - Louisa Preston