List of Stuff You Should Know episodes (2009)
# List of Stuff You Should Know episodes (2009)

This is a list of episodes from 2009 for the Stuff You Should Know podcast.

## 2009 season

| No. in series | No. in season | Title | Length | Original air date |
| - | - | - | - | - |
| 74 | 1 | "How Midnight Regulations Work" | 24 minutes | January 1, 2009 (2009-01-01) |
| 75 | 2 | "How Exorcism Works" | 18 minutes | January 6, 2009 (2009-01-06) |
| 76 | 3 | "How Body Armor Works: A Special Request" | 17 minutes | January 8, 2009 (2009-01-08) |
| 77 | 4 | "What are urban explorers?" | 16 minutes | January 13, 2009 (2009-01-13) |
| 78 | 5 | "How Redheads Work" | 16 minutes | January 15, 2009 (2009-01-15) |
| 79 | 6 | "Recycling and the Great Pacific Garbage Patch" | 24 minutes | January 20, 2009 (2009-01-20) |
| 80 | 7 | "How Moonshine Works" | 24 minutes | January 22, 2009 (2009-01-22) |
| 81 | 8 | "How Comas Work" | 24 minutes | January 27, 2009 (2009-01-27) |
| 82 | 9 | "How Hypoallergenic Cats Work" | 15 minutes | January 29, 2009 (2009-01-29) |
| 83 | 10 | "Why do some people believe the moon landings were a hoax?" | 18 minutes | February 3, 2009 (2009-02-03) |
| 84 | 11 | "Why is it so hard to say “toy boat” three times fast?" | 17 minutes | February 5, 2009 (2009-02-05) |
| 85 | 12 | "How long can you go without food and water?" | 22 minutes | February 10, 2009 (2009-02-10) |
| 86 | 13 | "How Friday the 13th Works" | 21 minutes | February 12, 2009 (2009-02-12) |
| 87 | 14 | "How Squatting Works" | 21 minutes | February 17, 2009 (2009-02-17) |
| 88 | 15 | "How Going Over Niagara Works" | 26 minutes | February 19, 2009 (2009-02-19) |
| 89 | 16 | "Can people really die of fright?" | 17 minutes | February 24, 2009 (2009-02-24) |
| 90 | 17 | "How Junk Mail Works" | 19 minutes | February 26, 2009 (2009-02-26) |
| 91 | 18 | "Could a ‘thinking cap’ make me a genius?" | 20 minutes | March 3, 2009 (2009-03-03) |
| 92 | 19 | "Who owns the oceans?" | 23 minutes | March 10, 2009 (2009-03-10) |
| 93 | 20 | "How Aphrodisiacs Work" | 21 minutes | March 12, 2009 (2009-03-12) |
| 94 | 21 | "What are microexpressions?" | 17 minutes | March 17, 2009 (2009-03-17) |
| 95 | 22 | "Can anger be a good thing?" | 19 minutes | March 19, 2009 (2009-03-19) |
| 96 | 23 | "How Déjà Vu Works" | 24 minutes | March 24, 2009 (2009-03-24) |
| 97 | 24 | "Are there dead bodies on Mount Everest?" | 25 minutes | March 26, 2009 (2009-03-26) |
| 98 | 25 | "Is the world going to end in 2012?" | 24 minutes | March 31, 2009 (2009-03-31) |
| 99 | 26 | "Bizarre Ways to Die" | 21 minutes | April 2, 2009 (2009-04-02) |
| 100 | 27 | "How can some centenarians lead unhealthy lives?" | 25 minutes | April 7, 2009 (2009-04-07) |
| 101 | 28 | "How Ponzi Schemes Work" | 26 minutes | April 9, 2009 (2009-04-09) |
| 102 | 29 | "How Money Laundering Works" | 26 minutes | April 14, 2009 (2009-04-14) |
| 103 | 30 | "Do toads cause warts?" | 22 minutes | April 16, 2009 (2009-04-16) |
| 104 | 31 | "How much money do I really need to live?" | 22 minutes | April 21, 2009 (2009-04-21) |
| 105 | 32 | "How Face Transplants Work" | 24 minutes | April 23, 2009 (2009-04-23) |
| 106 | 33 | "Is high fructose corn syrup bad for you?" | 18 minutes | April 28, 2009 (2009-04-28) |
| 107 | 34 | "How do credit default swaps work?" | 21 minutes | April 30, 2009 (2009-04-30) |
| 108 | 35 | "Why do humans have body hair?" | 21 minutes | May 5, 2009 (2009-05-05) |
| 109 | 36 | "How can a lake explode?" | 24 minutes | May 7, 2009 (2009-05-07) |
| 110 | 37 | "What causes rigor mortis?" | 19 minutes | May 12, 2009 (2009-05-12) |
| 111 | 38 | "Is it better to buy local or organic food?" | 29 minutes | May 14, 2009 (2009-05-14) |
| 112 | 39 | "How Lobotomies Work" | 32 minutes | May 19, 2009 (2009-05-19) |
| 113 | 40 | "Do animals have a sixth sense?" | 20 minutes | May 21, 2009 (2009-05-21) |
| 114 | 41 | "How Propaganda Works" | 34 minutes | May 26, 2009 (2009-05-26) |
| 115 | 42 | "Is spontaneous human combustion real?" | 20 minutes | May 28, 2009 (2009-05-28) |
| 116 | 43 | "What’s a brownfield remediation project?" | 18 minutes | June 2, 2009 (2009-06-02) |
| 117 | 44 | "How Biohydrocarbons Work" | 24 minutes | June 4, 2009 (2009-06-04) |
| 118 | 45 | "How did Nikola Tesla change the way we use energy?" | 26 minutes | June 9, 2009 (2009-06-09) |
| 119 | 46 | "How Carbon Capture and Storage Works" | 29 minutes | June 11, 2009 (2009-06-11) |
| 120 | 47 | "Three Innovations We Need Right Now" | 26 minutes | June 16, 2009 (2009-06-16) |
| 121 | 48 | "What exactly is the Peter Principle?" | 23 minutes | June 18, 2009 (2009-06-18) |
| 122 | 49 | "Can you control your dreams?" | 26 minutes | June 23, 2009 (2009-06-23) |
| 123 | 50 | "How Body Dysmorphic Disorder Works" | 24 minutes | June 25, 2009 (2009-06-25) |
| 124 | 51 | "How Earthquakes Work" | 26 minutes | June 30, 2009 (2009-06-30) |
| 125 | 52 | "How can hypermiling save you gas?" | 22 minutes | July 2, 2009 (2009-07-02) |
| 126 | 53 | "Is it possible to brainwash someone?" | 27 minutes | July 7, 2009 (2009-07-07) |
| 127 | 54 | "How Twinkies Work" | 25 minutes | July 9, 2009 (2009-07-09) |
| 128 | 55 | "How has toxoplasma turned the world into zombies?" | 20 minutes | July 14, 2009 (2009-07-14) |
| 129 | 56 | "What is a body farm?" | 25 minutes | July 16, 2009 (2009-07-16) |
| 130 | 57 | "Are stupid people happier?" | 21 minutes | July 21, 2009 (2009-07-21) |
| 131 | 58 | "Three Gross Parasites" | 28 minutes | July 23, 2009 (2009-07-23) |
| 132 | 59 | "What are tinnovators?" | 24 minutes | July 28, 2009 (2009-07-28) |
| 133 | 60 | "How Whale Sharks Work" | 27 minutes | July 30, 2009 (2009-07-30) |
| 134 | 61 | "How Agent Orange Worked" | 25 minutes | August 4, 2009 (2009-08-04) |
| 135 | 62 | "What’s up with competitive eating?" | 28 minutes | August 6, 2009 (2009-08-06) |
| 136 | 63 | "What are Japanese stragglers?" | 29 minutes | August 11, 2009 (2009-08-11) |
| 137 | 64 | "Is fluoride making us stupid?" | 26 minutes | August 13, 2009 (2009-08-13) |
| 138 | 65 | "What’s sarcopenia and what can you do about it?" | 22 minutes | August 18, 2009 (2009-08-18) |
| 139 | 66 | "Is the Necronomicon real?" | 30 minutes | August 20, 2009 (2009-08-20) |
| 140 | 67 | "How easy is it to steal a nuclear bomb?" | 26 minutes | August 25, 2009 (2009-08-25) |
| 141 | 68 | "How Muppets Work" | 32 minutes | August 27, 2009 (2009-08-27) |
| 142 | 69 | "Why is the U.S. so dependent on cars?" | 30 minutes | September 1, 2009 (2009-09-01) |
| 143 | 70 | "What is an Ig Nobel Prize?" | 23 minutes | September 3, 2009 (2009-09-03) |
| 144 | 71 | "What is geocaching?" | 27 minutes | September 8, 2009 (2009-09-08) |
| 145 | 72 | "Could microlending develop the world?" | 27 minutes | September 10, 2009 (2009-09-10) |
| 146 | 73 | "How Health Care in the United States Works Right Now" | 31 minutes | September 15, 2009 (2009-09-15) |
| 147 | 74 | "How do dogs perceive time?" | 25 minutes | September 17, 2009 (2009-09-17) |
| 148 | 75 | "President Obama’s Health Care Plan: Soup to Nuts" | 29 minutes | September 22, 2009 (2009-09-22) |
| 149 | 76 | "Do zombies really exist?" | 36 minutes | September 24, 2009 (2009-09-24) |
| 150 | 77 | "Rumors, Myths and Truths Behind Obama’s Health Care Plan" | 34 minutes | September 29, 2009 (2009-09-29) |
| 151 | 78 | "Is Bhutan on to something with Gross National Happiness?" | 33 minutes | October 1, 2009 (2009-10-01) |
| 152 | 79 | "Health Care Systems Around the World" | 32 minutes | October 6, 2009 (2009-10-06) |
| 153 | 80 | "Who were the first Americans?" | 29 minutes | October 8, 2009 (2009-10-08) |
| 154 | 81 | "How to Find the History of Your House" | 26 minutes | October 13, 2009 (2009-10-13) |
| 155 | 82 | "What is a hangover, really?" | 31 minutes | October 15, 2009 (2009-10-15) |
| 156 | 83 | "What is China’s one-child policy?" | 25 minutes | October 20, 2009 (2009-10-20) |
| 157 | 84 | "How the Cannonball Run Worked" | 30 minutes | October 22, 2009 (2009-10-22) |
| 158 | 85 | "How Witness Protection Works" | 26 minutes | October 27, 2009 (2009-10-27) |
| 159 | 86 | "The Real How Jack the Ripper Worked" | 39 minutes | October 29, 2009 (2009-10-29) |
| 160 | 87 | "Can you remember being born?" | 26 minutes | November 3, 2009 (2009-11-03) |
| 161 | 88 | "How Product Placement Works" | 33 minutes | November 5, 2009 (2009-11-05) |
| 162 | 89 | "How will the future crime database work?" | 28 minutes | November 10, 2009 (2009-11-10) |
| 163 | 90 | "How Population Works" | 28 minutes | November 12, 2009 (2009-11-12) |
| 164 | 91 | "What’s the deal with totem poles?" | 20 minutes | November 17, 2009 (2009-11-17) |
| 165 | 92 | "10 Odd Town Festivals" | 26 minutes | November 19, 2009 (2009-11-19) |
| 166 | 93 | "What is Mutual Assured Destruction?" | 24 minutes | November 24, 2009 (2009-11-24) |
| 167 | 94 | "How Hostage Negotiation Works" | 28 minutes | November 26, 2009 (2009-11-26) |
| 168 | 95 | "How Food Cravings Work" | 29 minutes | December 1, 2009 (2009-12-01) |
| 169 | 96 | "How Near-Death Experiences Work" | 26 minutes | December 3, 2009 (2009-12-03) |
| 170 | 97 | "Will the Large Hadron Collider destroy the Earth?" | 34 minutes | December 8, 2009 (2009-12-08) |
| 171 | 98 | "How the Hells Angels Work" | 34 minutes | December 10, 2009 (2009-12-10) |
| 172 | 99 | "How Narco States Work" | 31 minutes | December 15, 2009 (2009-12-15) |
| 173 | 100 | "How Kleptomania Works" | 25 minutes | December 17, 2009 (2009-12-17) |
| 174 | 101 | "Do concussions cause early death?" | 26 minutes | December 22, 2009 (2009-12-22) |
| 175 | 102 | "How Christmas Worked" | 27 minutes | December 24, 2009 (2009-12-24) |
| 176 | 103 | "How Pirates Work" | 32 minutes | December 29, 2009 (2009-12-29) |
| 177 | 104 | "How Human Experimentation Works" | 27 minutes | December 31, 2009 (2009-12-31) |
