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Whites of Their Eyes
Lakes and Oceans
RuBisCO
Fountain
Umwelt
Reviews
Cadbury Eggs
Share Buttons
Formal Logic
Networking
s/keyboard/leopard/
Keyed
Drawing Stars
Communication
Pickup Artist
Compare and Contrast
Tumblr
Error Code
Late-Night PBS
So It Has Come To This
Business Plan
Orion Nebula
First Post
Good Cop, Dadaist Cop
Backward in Time
Valentine Dilemma
Kerning
Car Problems
Wake Up Sheeple
Wrong Superhero
Baby Names
Etymology-Man
Sigh
Suckville
Sustainable
Sloppier Than Fiction
SOPA
Batman
Adam and Eve
Game AIs
AAAAAA
1000 Comics
Cougars
2012
Wait Wait
Making Things Difficult
Coinstar
Advent Calendar
Brand Identity
Mnemonics
Phantom Menace
Plastic Bags
Cryogenics
Tradition
Potential
Drinking Fountains
Percentage Points
Space Launch System
Privacy
Set Theory
Porn Folder
Money
Wisdom of the Ancients
Citogenesis
Map Projections
Sail
Occulting Telescope
The General Problem
MTV Generation
November
Alternative Literature
The Important Field
Delta-P
Everything
Prairie
Jet Fuel
Elements
Dorm Poster
X11
The Corliss Resolution
Eternal Flame
Subliminal
Caroling
Hotels
Development
Sharing
Neutrinos
Chin-Up Bar
1 to 10
Stud Finder
Working
Mystery Solved
File Transfer
AI
Investing
Family Decals
I'm Sorry
Hurricane Names
Empirical
Juggling
Depth Perception
Oversight
Arrow
T-Cells
TornadoGuard
Password Strength
Missed Connections
Mac/PC
Tattoo
CIA
Lanes
Days of the Week
Speculation
Mimic Octopus
Standards
Time Vulture
Cell Phones
3D Printer
Strunk and White
Fight Club
Delivery Notification
YouTube Parties
Tween Bromance
Google+
Hofstadter
Unpickable
Connoisseur
Ice
Core
Manual Override
Magic School Bus
Permanence
Worst-Case Shopping
The Cloud
Ages
Advertising Discovery
Homeownership
Sports
Extended Mind
Darmok and Jalad
Temperature
Religions
Number Line
Chain of Command
Elevator Inspection
Marie Curie
Teaching Physics
Progeny
65 Years
Null Hypothesis
Movie Ages
Etymology
Turtles
Heaven
Future Timeline
Craigslist Apartments
Recycling
Rogers St.
Pain Rating
Significant
Probability
Headache
Lamp
Model Rail
Beauty
Trapped
2009 Called
Time Management
FPS Mod
Fairy Tales
Charity
Advertising
Server Attention Span
Nolan Chart
Herpetology
Compass and Straightedge
Nanobots
Flying Cars
Major in the Universe
Let Go
Wisdom Teeth
Never Do This
(
Milk
Archimedes
Trochee Fixation
1999
Learning to Cook
Consecutive Vowels
Local g
Na
World According to Americans
Complex Conjugate
3D
Stingray Nebula
Dental Nerve
Modern History
Good Code
Misconceptions
Mark
Audiophiles
Serious
Explorers
Incident
Coupon Code
Sickness
Tree
Wikileaks
Convincing
Tic-Tac-Toe
Weather Radar
Genetic Analysis
Arsenic-Based Life
Positive Attitude
Business Idea
Guest Week: Zach Weiner (SMBC)
Guest Week: Jeffrey Rowland (Overcompensating)
Guest Week: Bill Amend (FoxTrot)
Guest Week: David Troupes (Buttercup Festival)
Guest Week: Jeph Jacques (Questionable Content)
Five-Minute Comics: Part 3
Five-Minute Comics: Part 2
Five-Minute Comics: Part 1
Illness
Mutual
Applied Math
Mu
Diode
One-Liners
Glass
Starlight
Constructive
Los Alamos
The Economic Argument
Connected
Tech Support
Paradise City
Pumpkin Carving
Airfoil
Online Communities 2
Golden Hammer
Beautiful Dream
Stephen Hawking
Adjectives
debian-main
Bad Ex
Conditional Risk
Inside Joke
Physicists
Password Reuse
Leaving
Control
Showdown
The Carriage
Orbiter
Exoplanets
Open Mic Night
Falling Asleep
I Don't Want Directions
Desecration
Ahead Stop
Sample
Anxiety
Scheduling
Pore Strips
Still No Sleep
Savannah Ancestry
Atheists
University Website
Frogger
Period Speech
All the Girls
War
1996
Temper
Green Flash
Dilution
One Two
Workaround
Analogies
DFS
Moria
3x9
Raptor Fences
Toot
Public Opinion
Interdisciplinary
Dependencies
Southern Half
Phobia
Swimsuit Issue
Book Burning
Study
Worst-Case Scenario
Geeks and Nerds
Birth
Dyslexics
Walkthrough
Infrastructures
Campfire
Blogging
The Tell-Tale Beat
Malamanteau
Incision
Yogurt
Cemetery
Floor
Outbreak
Eagle
HDTV
Desert Island
Circuit Diagram
Laser Pointer
iPad
Trade Expert
Seat Selection
Literally
Hell
Seismic Waves
Computer Problems
Flatland
Recipes
Brain Worms
The Flake Equation
Furtive
Time Machine
Numbers
Porn For Women
GeoIP
Single Ladies
Seismograph
Collatz Conjecture
I Am
Sex Dice
Joshing
Freedom
Devotion to Duty
Principle of Explosion
Honor Societies
Snow Tracking
Science Valentine
Complexion
Trimester
You Hang Up First
Tensile vs. Shear Strength
Strip Games
Spirit
Retro Virus
Children's Fantasy
Dirty Harry
MicroSD
Semicontrolled Demolition
FIRST Design
Self-Description
Dimensional Analysis
Admin Mourning
G-Spot
We Get It
Science Montage
Force
Gravity Wells
December 25th
Christmas Plans
Researcher Translation
Asshole
Abstraction
Revolutionary
Natural Parenting
The Sun
Suggestions
Stephen and Me
Spinal Tap Amps
Experiment
Pandora
SkiFree
Silent Hammer
Prudence
Academia vs. Business
Sagan-Man
iPhone or Droid
Two-Party System
Sympathy
Lego
Orbitals
Movie Narrative Charts
October 30th
Climbing
Nachos
So Bad It's Worse
More Accurate
Bag Check
Nowhere
Static
Fall Foliage
Scary
Conversations
RPS
Surgery
Ohm
Creepy
Free
Tornado Hunter
Lincoln-Douglas
The Search
Scribblenauts
Brontosaurus
Locke and Demosthenes
Date
Blockbuster Mining
Suspicion
Anatomy Text
Time Travel
Skins
Psychic
Tech Support Cheat Sheet
Newton and Leibniz
Collections
Branding
Oregon
Haiku Proof
Superlative
Wings
Supported Features
Asteroid
Understocked
Lease
Avoidance
Woodpecker
Threesome
Estimation
Disaster Voyeurism
Sheeple
Tab Explosion
Form
2038
Cutting Edge
Extrapolating
Qwertial Aphasia
Idiocracy
Overstimulated
Game Theory
Android Boyfriend
Apocalypse
Porn
Addiction
Latitude
Android Girlfriend
Period
Voynich Manuscript
Drama
Troll Slayer
Papyrus
Designated Drivers
Pep Rally
Crime Scene
Mission to Culture
Outreach
Unsatisfied
CNR
Brakes
The Race: Part 5
The Race: Part 4
The Race: Part 3
The Race: Part 2
The Race: Part 1
Packages
Tag Combination
Swine Flu
Parental Trolling
Together
Can't Sleep
New Car
Borders
Well 2
Urgent Mission
Matrix Revisited
Security Question
Crossbows
Fermirotica
Parking
Well
Lithium Batteries
No Pun Intended
1000 Times
Students
Alternative Energy Revolution
Two Mirrors
Not Enough Work
Pirate Bay
Correlation
Etch-a-Sketch
Density
Westley's a Dick
Kindle
Simple
Music DRM
Neutrality Schmeutrality
Pep Talk
Sierpinski Valentine
Cover-Up
TED Talk
Base System
Boyfriend
Security
Ducklings
Space Elevators
It Might Be Cool
Genetic Algorithms
Laptop Hell
Piano
Contingency Plan
I'm An Idiot
Sledding Discussion
Windows 7
Keynote
Converting to Metric
I Know You're Listening
Party
Decline
Google Trends
2008 Christmas Special
Cuttlefish
11th Grade
Flow Charts
Marshmallow Gun
Wood Chips
No One Must Know
Simultaneous
Friends
Alternate Currency
Sleet
Egg Drop Failure
Induced Current
Drapes
Experimentation
Theft of the Magi
A Bunch of Rocks
Legal Hacks
Terminology
Dark Flow
Faust 2.0
Election
Scantron
Secretary: Part 5
Secretary: Part 4
Secretary: Part 3
Secretary: Part 2
Secretary: Part 1
Actuarial
Scrabble
Twitter
Morning Routine
Going West
Steal This Comic
Numerical Sex Positions
I am Not a Ninja
Depth
Flash Games
Fiction Rule of Thumb
Height
Listen to Yourself
Spore
Tones
The Staple Madness
Typewriter
One-Sided
Further Boomerang Difficulties
Turn-On
Still Raw
House of Pancakes
Aversion Fads
The End is Not for a While
Improvised
Fetishes
X Girls Y Cups
Moving
Quantum Teleportation
RBA
Voting Machines
Freemanic Paracusia
Google Maps
Paleontology
Holy Ghost
Regrets
Frustration
Cautionary
Hats
Rewiring
Upcoming Hurricanes
Mission
Impostor
The Sea
Things Fall Apart
Good Morning
Too Old For This Shit
In Popular Culture
I Am Not Good with Boomerangs
Macgyver Gets Lazy
Know Your Vines
xkcd Loves the Discovery Channel
Babies
Road Rage
Thinking Ahead
Internet Argument
SUV
How it Happened
Purity
xkcd Goes to the Airport
Journal 5
Journal 4
Delivery
Every Damn Morning
Fantasy
Starwatching
Bad Timing
Geohashing
Fortune Cookies
Security Holes
Finish Line
A Better Idea
Making Hash Browns
Jealousy
Forks and Spoons
Stove Ownership
The Man Who Fell Sideways
Zealous Autoconfig
Restraining Order
Mistranslations
New Pet
Startled
Techno
Math Paper
Electric Skateboard (Double Comic)
Overqualified
Cheap GPS
Venting
Journal 3
Convincing Pickup Line
1,000 Miles North
Large Hadron Collider
Important Life Lesson
Travelling Salesman Problem
Tap That Ass
Unscientific
The Ring
Morning
Kilobyte
Ultimate Game
Making Rules
Anti-Mindvirus
Nightmares
Keeping Time
Fuck Grapefruit
Advanced Technology
Duty Calls
How it Works
The Drake Equation
Helping
Trebuchet
Mobius Battle
Emoticon
Forgetting
Real Programmers
Journal 2
Bug
Pod Bay Doors
Journal
The Data So Far
To Be Wanted
Compiler Complaint
Redwall
Dangers
Bass
Fandom
Your Mom
Slides
Responsible Behavior
Reset
Blade Runner
Christmas Back Home
Writers Strike
Rock Band
Loud Party
Flies
Nerd Sniping
Couple
Startling
Python
Far Away
Trolling
Network
Success
Close to You
Brick Archway
Diet Coke+Mentos
1337: Part 5
1337: Part 4
1337: Part 3
1337: Part 2
1337: Part 1
Fight
Classic
Future
Post Office Showdown
Priorities
Mattress
Wasteland
Getting Out of Hand
Gyroscopes
Photoshops
Indecision
Turing Test
Eggs
Exploits of a Mom
Effect an Effect
A-Minus-Minus
Tapping
Ballmer Peak
Pix Plz
Thighs
28-Hour Day
Engineering Hubris
Nostalgia
That Lovin' Feelin'
Loud Sex
Braille
Dating Pools
Insomnia
With Apologies to Robert Frost
Action Movies
Commitment
Shopping Teams
Interesting Life
Excessive Quotation
Orphaned Projects
Rule 34
Nighttime Stories
Compiling
Names
Limerick
Facebook
Aeris Dies
Tesla Coil
Lisp Cycles
Tony Hawk
DNE
Bookstore
RTFM
goto
Dignified
Fucking Blue Shells
Alone
Elevator
NP-Complete
All Your Base
Wikipedian Protester
Tape Measure
Projection
Organic Fuel
Online Package Tracking
Librarians
Pickup Lines
Black Hat Support
Long Light
Fixed Width
Thoughts
With Apologies to The Who
Electromagnetic Spectrum
Linux User at Best Buy
Powers of One
Merlin
TCMP
Choices: Part 5
Choices: Part 4
Choices: Part 3
Choices: Part 2
Choices: Part 1
Certainty
IN UR REALITY
Regarding Mussolini
The Glass Necklace
Clichéd Exchanges
Conspiracy Theories
Code Talkers
Online Communities
Subjectivity
Comic Fragment
Highway Engineer Pranks
Escalators
CD Tray Fight
Snopes
Chess Photo
Hypotheticals
Factoring the Time
Labyrinth Puzzle
Floor Tiles
Tabletop Roleplaying
Appropriate Term
The Difference
Battle Room
Dream Girl
Blagofaire
Pet Peeve #114
Keyboards are Disgusting
Collecting Double-Takes
Kite
Escape Artist
A New CAPTCHA Approach
Chess Enlightenment
Cat Proximity
Hamiltonian
Graffiti
Resonance
Color Codes
Swingset
Open Source
Lisp
Valentine's Day
Small Talk
Random Number
Philosophy
Blanket Fort
Nintendo Surgeon
e to the pi Minus pi
Romantic Drama Equation
Letting Go
The Problem with Wikipedia
Ghostbusters Marathon
Brain
Hamster Ball Heist
90's Flowchart
Kayak
Regular Expressions
What xkcd Means
Reno Rhymes
Candy Button Paper
America
Hallucinations
YouTube
Christmas GPS
Bill Nye
Right-Hand Rule
Perspective
Ninja Turtles
Command Line Fu
Map of the Internet
Penises
The Perfect Sound
Working for Google
Lojban
IPoD
Exercise
Reload
The Familiar
Console Lines
Wikifriends
Matrix Transform
Snacktime Rules
Nash
Interblag
Canada
e to the pi times i
Not Really Into Pokemon
Alice and Bob
Before Sunrise
Automatic Doors
That's What SHE Said
Movie Seating
Skateboarding is Not a Crime
String Theory
Turn Back
Words that End in GRY
Reverse Euphemisms
Nihilism
Misusing Slang
Turn Signals
Playing Devil's Advocate to Win
Donald Knuth
Angular Momentum
Accident
Penny Arcade Parody
Boombox
Six Months
Filler Art
Commented
Search History
Beliefs
Cryptography
Hamster Ball
Mario
Grownups
Sandwich
Mispronouncing
A Way So Familiar
Join Myspace
Parody Week: Dinosaur Comics
Parody Week: A Softer World
Parody Week: TFD and Natalie Dee
Parody Week: Megatokyo
Parody Week: Achewood
Delicious
I Have Owned Two Electric Skateboards
Pointers
Dreams
Science Fair
Substitute
Myspace
The Raven
Music Knowledge
Fans
Julia Stiles
Content Protection
dPain over dt
The Fast and the Furious
Red Spiders Cometh
Marketing Interview
Blogofractal
Centrifugal Force
Quirky Girls
Balloon
Dating Service
Worst Band Name Ever
50 Ways
Pong
City
Meerkat
Computational Linguists
Riemann-Zeta
Baring My Heart
Firefox and Witchcraft - The Connection?
Clark Gable
Spoiler Alert
M.C. Hammer Slide
Snakes on a Plane! 2
Wright Brothers
Parallel Universe
Find You
Moral Relativity
Back to the Future
Laser Scope
Family Circus
Binary Heart
Fall Apart
A Simple Plan
Mail
The Sierpinski Penis Game
Profile Creation Flowchart
Jeremy Irons
Sunrise
Pwned
Jacket
Gravitational Mass
Escher Bracelet
Velociraptors
Digital Rights Management
Paths
National Language
Katamari
Frame
Attention, shopper
My Other Car
Iambic Pentameter
Garfield
Bored with the Internet
Familiar
Curse Levels
Su Doku
Zeppelin
Classhole
In the Trees
Guitar Hero
Pillow Talk
Five Thirty
Nerd Girls
Abusive Astronomy
Banter
Solar Plexus
Valentine - Heart
Valentine - Karnaugh
Stacey's Dad
Super Bowl
Graduation
Why Do You Love Me?
Wait For Me
The Cure
Useless
Science
Hobby
Secret Worlds
Malaria
Penny Arcade
Want
Found
Counter-Red Spiders
Secrets
Schrodinger
Love
Red Spiders 2
Geico
Old Drawing
Light
Bowl
Apple Jacks
Hyphen
Scientists
Sheep
Flowers
Self-reference
Pillar
Barrel - Part 5
Donner
Hitler
Elefino
Meat Cereals
Fourier
Barrel - Part 4
Godel, Escher, Kurt Halsey
T-shirts
Barrel - Part 3
Kepler
Ferret
George Clinton
Snapple
What If
Monty Python -- Enough
Just Alerting You
Copyright
Canyon
Poisson
Barrel - Part 2
Pi Equals
Serenity is coming out tomorrow
Red spiders
Girl sleeping (Sketch -- 11th grade Spanish class)
Irony
Blown apart
Landscape (sketch)
Island (sketch)
Petit Trees (sketch)
Barrel - Part 1

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Warning: this comic occasionally contains strong language (which may be unsuitable for children), unusual humor (which may be unsuitable for adults), and advanced mathematics (which may be unsuitable for liberal-arts majors).