Editing What If? chapters

<noinclude>:''For other instances of this title, see [[What If (disambiguation)]]</noinclude>.
This is a list of all articles featured in Randall Munroe's [[what if? (blog)|''what if?'' blog]] and the [[What If? (book)|''What If?'' book series]].  If an article on the blog has a different name in the corresponding book, then the alternative title will be listed alongside the original title.

{| class="wikitable sortable"
|-
! Article title
! Alternative title
! Website no.
! ''What If?'' chapter
! ''What If? 2'' chapter
|-
| Relativistic Baseball || || 1 || 2 ||
|-
| SAT Guessing || || 2 || 66 ||
|-
| Yoda || || 3 || 32 ||
|-
| Mole of Moles || || 4 || 10 ||
|-
| Robot Apocalypse || || 5 || ||
|-
| Glass Half Empty || || 6 || 26 ||
|-
| Everybody Out || || 7 || 35 ||
|-
| Everybody Jump || || 8 || 9 ||
|-
| Soul Mates || || 9 || 6 ||
|-
| Cassini || || 10 || ||
|-
| Droppings || || 11 || ||
|-
| Raindrop || || 12 || 65 ||
|-
| Laser Pointer || || 13 || 7 ||
|-
| Short Answer Section || || 14 || ||
|-
| Mariana Trench Explosion || || 15 || ||
|-
| Today’s topic: Lightning || Lightning || 16 || 19 ||
|-
| Green Cows || || 17 || ||
|-
| BB Gun || || 18 || ||
|-
| Tie Vote || || 19 || ||
|-
| Diamond || || 20 || ||
|-
| Machine-Gun Jetpack || || 21 || 14 ||
|-
| Cost of Pennies || || 22 || ||
|-
| Short Answer Section II || Short-Answer Section || 23 || 18 ||
|-
| Model Rockets || || 24 || ||
|-
| Three Wise Men || || 25 || ||
|-
| Leap Seconds || || 26 || ||
|-
| Death Rates || || 27 || ||
|-
| Steak Drop || || 28 || 23 ||
|-
| Spent Fuel Pool || || 29 || 3 ||
|-
| Interplanetary Cessna || || 30 || 30 ||
|-
| FedEx Bandwidth || || 31 || 44 ||
|-
| Hubble || || 32 || ||
|-
| Ships || || 33 || ||
|-
| Twitter || || 34 || 50 ||
|-
| Hair Dryer || || 35 || 11 ||
|-
| Cornstarch || || 36 || ||
|-
| Supersonic Stereo || || 37 || ||
|-
| Voyager || || 38 || ||
|-
| Hockey Puck || || 39 || 24 ||
|-
| Pressure Cooker || || 40 || ||
|-
| Go West || || 41 || ||
|-
| Longest Sunset || || 42 || 52 ||
|-
| Train Loop || || 43 || ||
|-
| High Throw || || 44 || 38 ||
|-
| ISS Music Video || || 45 || ||
|-
| Bowling Ball || || 46 || ||
|-
| Alien Astronomers || || 47 || 28 ||
|-
| Sunset on the British Empire || || 48 || 60 ||
|-
| Sunless Earth || || 49 || 57 ||
|-
| Extreme Boating || || 50 || ||
|-
| Free Fall || || 51 || 45 ||
|-
| Bouncy Balls || || 52 || ||
|-
| Drain the Oceans || || 53 || 48 ||
|-
| Drain the Oceans: Part II || || 54 || 49 ||
|-
| Random Sneeze Call || || 55 || 53 ||
|-
| Restraining an Airplane || || 56 || ||
|-
| Dropping a Mountain || || 57 || ||
|-
| Orbital Speed || || 58 || 43 ||
|-
| Updating a Printed Wikipedia || || 59 || 58 ||
|-
| Signs of Life || || 60 || ||
|-
| Speed Bump || || 61 || 41 ||
|-
| Falling with Helium || || 62 || 34 ||
|-
| Google’s Datacenters on Punch Cards || || 63 || ||
|-
| Rising Steadily || || 64 || 15 ||
|-
| Twitter Timeline Height || || 65 || ||
|-
| 500 MPH || || 66 || ||
|-
| Expanding Earth || || 67 || 55 ||
|-
| Human Computer || || 68 || 21 ||
|-
| Facebook of the Dead || || 69 || 59 ||
|-
| The Constant Groundskeeper || || 70 || ||
|-
| Stirring Tea || || 71 || 61 ||
|-
| Loneliest Human || || 72 || 63 ||
|-
| Lethal Neutrinos || || 73 || 39 ||
|-
| Soda Planet || || 74 || ||
|-
| Phone Keypad || || 75 || ||
|-
| Reading Every Book || || 76 || || 10
|-
| Growth Rate || || 77 || ||
|-
| T-rex Calories || || 78 || || 7
|-
| Lake Tea || || 79 || ||
|-
| Pile of Viruses || || 80 || ||
|-
| Catch! || || 81 || || 12
|-
| Hitting a comet || || 82 || ||
|-
| Star Sand || || 83 || || 16
|-
| Paint the Earth || || 84 || || 14
|-
| Rocket Golf || || 85 || ||
|-
| Far-Traveling Objects || || 86 || ||
|-
| Enforced by Radar || || 87 || ||
|-
| Soda Sequestration || || 88 || ||
|-
| Tungsten Countertop || || 89 || ||
|-
| Great Tree, Great Axe || || 90 || ||
|-
| Faucet Power || || 91 || ||
|-
| One-Second Day || || 92 || || 21
|-
| Windshield Raindrops || || 93 || ||
|-
| Billion-Story Building || || 94 || || 22
|-
| Pyramid Energy || || 95 || ||
|-
| $2 Undecillion Lawsuit || || 96 || || 23
|-
| Burning Pollen || || 97 || ||
|-
| Blood Alcohol || || 98 || || 42
|-
| Starlings || || 99 || ||
|-
| WWII Films || || 100 || ||
|-
| Plastic Dinosaurs || || 101 || || 26
|-
| Keyboard Power || || 102 || ||
|-
| Vanishing Water || || 103 || ||
|-
| Global Snow || || 104 || || 59
|-
| Cannibalism || || 105 || ||
|-
| Ink Molecules || || 106 || ||
|-
| Letter to Mom || || 107 || ||
|-
| Expensive Shoebox || || 108 || ||
|-
| Into the Blue || || 109 || ||
|-
| Walking New York || || 110 || ||
|-
| All the Money || || 111 || ||
|-
| Balloon Car || || 112 || ||
|-
| Visit Every State || || 113 || ||
|-
| Antimatter || || 114 || ||
|-
| Into the Sun || || 115 || || 61
|-
| No-Rules NASCAR || || 116 || || 35
|-
| Distant Death || || 117 || ||
|-
| Physical Salary || || 118 || ||
|-
| Laser Umbrella || || 119 || ||
|-
| Alternate Universe What Ifs || || 120 || ||
|-
| Frozen Rivers || || 121 || ||
|-
| Lava Lamp || || 122 || || 40
|-
| Fairy Demographics || || 123 || ||
|-
| Lunar Swimming || || 124 || ||
|-
| Bowling Ball || || 125 || ||
|-
| Stairs || || 126 || ||
|-
| Tug of War || || 127 || ||
|-
| Zippo Phone || || 128 || ||
|-
| Black Hole Moon || || 129 || ||
|-
| Snow Removal || || 130 || ||
|-
| Microwaves || || 131 || ||
|-
| Hotter than Average || || 132 || ||
|-
| Flagpole || || 133 || ||
|-
| Space Burial || || 134 || ||
|-
| Digging Downward || || 135 || ||
|-
| Spiders vs. the Sun || || 136 || || 44
|-
| New Horizons || || 137 || ||
|-
| Jupiter Submarine || || 138 || ||
|-
| Jupiter Descending || || 139 || ||
|-
| Proton Earth, Electron Moon || || 140 || || 48
|-
| Sunbeam || || 141 || ||
|-
| Space Jetta || || 142 || ||
|-
| Europa Water Siphon || || 143 || ||
|-
| Saliva Pool || || 144 || || 53
|-
| Fire from Moonlight || || 145 || || 51
|-
| Stop Jupiter || || 146 || ||
|-
| Niagara Straw || || 147 || || 55
|-
| Eat the Sun || || 148 || ||
|-
| Pizza Bird || || 149 || ||
|-
| Tattooine Rainbow || || 150 || ||
|-
| Sun Bug || || 151 || ||
|-
| Flood Death Valley || || 152 || ||
|-
| Hide the Atmosphere || || 153 || ||
|-
| Coast-to-Coast Coasting || || 154 || ||
|-
| Toaster vs. Freezer || || 155 || ||
|-
| Electrofishing for Whales || || 156 || ||
|-
| Earth-Moon Fire Pole || || 157 || || 58
|-
| Global Windstorm || || || 1 ||
|-
| Weird (and Worrying) Questions from the What If? Inbox, #1 || || || 4 ||
|-
| New York–Style Time Machine || || || 5 ||
|-
| Periodic Wall of the Elements || || || 8 ||
|-
| Weird (and Worrying) Questions from the What If? Inbox, #2 || || || 12 ||
|-
| The Last Human Light || || || 13 ||
|-
| Weird (and Worrying) Questions from the What If? Inbox, #3 || || || 16 ||
|-
| Orbital Submarine || || || 17 ||
|-
| Weird (and Worrying) Questions from the What If? Inbox, #4 || || || 20 ||
|-
| Little Planet || || || 22 ||
|-
| Common Cold || || || 25 ||
|-
| Weird (and Worrying) Questions from the What If? Inbox, #5 || || || 27 ||
|-
| No More DNA || || || 29 ||
|-
| Weird (and Worrying) Questions from the What If? Inbox, #6 || || || 31 ||
|-
| Flyover States || || || 33 ||
|-
| Weird (and Worrying) Questions from the What If? Inbox, #7 || || || 36 ||
|-
| Self-Fertilization || || || 37 ||
|-
| Weird (and Worrying) Questions from the What If? Inbox, #8 || || || 40 ||
|-
| Lost Immortals || || || 42 ||
|-
| Weird (and Worrying) Questions from the What If? Inbox, #9 || || || 46 ||
|-
| Sparta || || || 47 ||
|-
| Lego Bridge || || || 51 ||
|-
| Weird (and Worrying) Questions from the What If? Inbox, #10 || || || 54 ||
|-
| Weightless Arrow || || || 56 ||
|-
| Stirring Tea || || || 62 ||
|-
| Weird (and Worrying) Questions from the What If? Inbox, #11 || || || 64 ||
|-
| Neutron Bullet || || || 67 ||
|-
| Weird (and Worrying) Questions from the What If? Inbox, #12 || || || 68 ||
|-
| Richter 15 || || || 69 ||
|-
| Soupiter || || || || 1
|-
| Helicopter Ride || || || || 2
|-
| Dangerously Cold || || || || 3
|-
| Ironic Vaporization || || || || 4
|-
| Cosmic Road Trip || || || || 5
|-
| Pigeon Chair || || || || 6
|-
| Short Answers #1 || || || || Unnumbered (between 6 and 7)
|-
| Geyser || || || || 8
|-
| Pew, Pew, Pew || || || || 9
|-
| Weird & Worrying #1 || || || || Unnumbered (between 10 and 11)
|-
| Banana Church || || || || 11
|-
| Lose Weight the Slow and Incredibly Difficult Way || || || || 13
|-
| Jupiter Comes to Town || || || || 15
|-
| Swing Set || || || || 17
|-
| Airliner Catapult || || || || 18
|-
| Short Answers #2 || || || || Unnumbered (between 18 and 19)
|-
| Slow Dinosaur Apocalypse || || || || 19
|-
| Elemental Worlds || || || || 20
|-
| Star Ownership || || || || 24
|-
| Tire Rubber || || || || 25
|-
| Short Answers #3 || || || || Unnumbered (between 26 and 27)
|-
| Suction Aquarium || || || || 27
|-
| Earth Eye || || || || 28
|-
| Build Rome in a Day || || || || 29
|-
| Mariana Trench Tube || || || || 30
|-
| Expensive Shoebox || || || || 31
|-
| MRI Compass || || || || 32
|-
| Ancestor Fraction || || || || 33
|-
| Bird Car || || || || 34
|-
| Weird & Worrying #2 || || || || Unnumbered (between 35 and 36)
|-
| Vacuum Tube Smartphone || || || || 36
|-
| Laser Umbrella || || || || 37
|-
| Eat a Cloud || || || || 38
|-
| Tall Sunsets || || || || 39
|-
| Sisyphean Refrigerators || || || || 41
|-
| Basketball Earth || || || || 43
|-
| Inhale a Person || || || || 45
|-
| Candy Crush Lightning || || || || 46
|-
| Short Answers #4 || || || || Unnumbered (between 46 and 47)
|-
| Toasty Warm || || || || 47
|-
| Eyeball || || || || 49
|-
| Japan Runs an Errand || || || || 50
|-
| Read All the Laws || || || || 52
|-
| Weird & Worrying #3 || || || || Unnumbered (between 52 and 53)
|-
| Snowball || || || || 54
|-
| Walking Backward in Time || || || || 56
|-
| Ammonia Tube || || || || 57
|-
| Short Answers #5 || || || || Unnumbered (between 58 and 59)
|-
| Dog Overload || || || || 60
|-
| Sunscreen || || || || 62
|-
| Walking on the Sun || || || || 63
|-
| Lemon Drops and Gumdrops || || || || 64
|}

[[Category:Books]]
{{xkcdmeta}}