ABCD
Noise Filter

Party Mode also enables the feature, but reverses the slider.
Crystal Ball

They often use ball lenses to collect light at the ends of optical fibers, so when you look stuff up on the internet you're actually scrying through a crystal ball.
Siphon

ADDITIONAL NOTES: Fixed a bug that caused some rocks to generate virtually infinite heat while just sitting there.
Taxiing

I don't understand why anyone would pay full price for a flatbed truck rental when you can buy 'DETOUR' signs online for like $10.
Planetary Scientist

This rumpled fabric at the corner looks like evidence of ongoing tectonic activity.
Commemorative Plaque
![[Below] On this site on May 12th, 2023, I finally learned how to use the masonry bit for my drill.](https://imgs.xkcd.com/comics/commemorative_plaque.png)
[Below] On this site on May 12th, 2023, I finally learned how to use the masonry bit for my drill.
College Knowledge

'Your chitin armor is no match for our iron-tipped stingers! Better go hide in your jars!' --common playground taunt
Tapetum Lucidum

Using a reflective wall in a game to give one shot two chances to hit is called a double-tapetum lucidum.
Overlapping Circles

"The Venn diagram of the sun and the moon is a circle." --someone being snarky at totality
Definition of e

Yeah, my math teacher back in high school set up the system to try to teach us something or other, but the 100% rate was unbelievably good, so I engineered a hostile takeover of his bank and now use it to make extra cash on the side.
Recipe Relativity

It says to cut the onions into 1/4" slices, but I'd better correct for length contraction.
Helium Reserve

The government has been trying to sell off the Federal Helium Reserve for a few years now, but the sale has been on hold while they try to figure out how to explain this situation to buyers.
Escape Speed

Gotta go fast
Cosmological Nostalgia Content

Later renouncing clickbait, Einstein called his inclusion of cosmological content in general relativity the biggest blunder of his career.
Linguistics Gossip

The E's wedding invitation definitely used the word LOVE more times than was strictly necessary.
Diffraction Spikes

Even if a planet is lucky enough to have a stable orbit that weaves between the spikes, the seasons get weird whenever it passes close to them.
1-to-1 Scale

There's a version that shows the planets with no cropping, but it's hard to find a display that supports it.
Paleontology Museum

Nowadays the only ones left that do anything are turtles.
Easily Confused Acronyms

'Lever' was originally an acronym for Load Emplification by the Vimulated Emission of Radiation.
My Favorite Things

When an Ur guy / sells Nanni things / but the copper's bad, / He simply records his complaint for all time / "I got a bad deal / I'm maaaaad"
Towed Message

"Hi, what you do is fly over a designated zone and detach the--" "WE'RE SORRY, THE MOBILE CUSTOMER YOU ARE TRYING TO REACH IS OUT OF SERVICE"
Qualifications

'So how DID you go from working at the employment records office to becoming president of MIT and CEO of IBM?' 'I guess I just have an eye for opportunities.'
Effect Size

Subgroup analysis is ongoing.
Relative Terms

Small sewing machines are sewing machines that are smaller than a sewing machine. A sewing machine is larger than a small sewing machine, but quieter than a loud sewing machine.
Air Handler

It maintains odor levels in a normal familiar range, so if you open the windows and the air gets too fresh, it filters it through some dirty laundry samples to compensate.
Salt Dome

The US uses hollowed-out salt domes to store the Strategic Petroleum Reserve, and non-hollowed-out ones to store the Strategic Salt Reserve.
March Madness

My bracket has 76 trombones led by John Philip Sousa facing off against thousands of emperor penguins led by Morgan Freeman.
Flatten the Planets

We'll turn the asteroid belt into ball bearings to go between different rings orbiting at different speeds.
Lymphocytes

It's very hard to detect, but recent studies have determined that when plasma B cells are producing antibodies, they go 'pew pew pew'
Radians are Cursed

Phil Plait once pointed out that you can calculate the total angular area of the sky this way. If the sky is a sphere with radius 57.3 degrees, then its area is 4*pi*r^2=41,253 square degrees. This makes dimensional analysts SO mad, but you can't argue with results.
Presents for Biologists

A lot of these are actually non-venomous, but I can see which species you mistook them for. If you pause the crane for a sec I can give you some ID pointers for next time!
Launch Window

"Confirmed, we have to scrub." "Ugh, okay. I'll get the bucket and sponge."
Obituary Editor

As the editor has reportedly defeated Death in a series of games of skill, no further obituaries are expected.
Fanservice

I was eventually kicked out of my architectural engineering program because I wouldn't stop referring to HVAC as "the fandom."
Hand Dryers

I know hand dryers have their problems, but I think for fun we should keep egging Dyson on and see if we can get them to make one where the airflow breaks the speed of sound.
Island Storage

I always hate dragging around the larger archipelagos, but I appreciate how the Scandinavian peninsula flexes outward to create a snug pocket for Britain and Ireland.
Wish Interpretation

"I wish for everything in the world. All the people, money, trees, etc." "Are you SURE you--" "And I want you to put it in my house."
Square Packing

I also managed to improve the solution for n=1 to s<0.97, and with some upgrades I think I can hit 0.96.
Data Quality
![[exclamation about how cute your cat is] -> [last 4 digits of your cat's chip ID] -> [your cat's full chip ID] -> [a drawing of your cat] -> [photo of your cat] -> [clone of your cat] -> [your actual cat] -> [my better cat]](https://imgs.xkcd.com/comics/data_quality.png)
[exclamation about how cute your cat is] -> [last 4 digits of your cat's chip ID] -> [your cat's full chip ID] -> [a drawing of your cat] -> [photo of your cat] -> [clone of your cat] -> [your actual cat] -> [my better cat]
Omniknot

The Gordian knot is an omniknot tied using every bend in the Ashley Book of Knots, and then for extra security the upper rope at every crossing is connected to the lower with a randomly-chosen hitch.
Weather Station

'Pour one out for precipitation data integrity,' I say, solemnly upending the glass into the rain gauge.
Only Serifs

If you ever want to get beaten up by a bunch of graphic designers, try removing the serifs from Times New Roman and adding them to Comic Sans.
Coordinate Plane Closure

3D graphs that don't contact the plane in the closure area may proceed as scheduled, but be alert for possible collisions with 2D graph lines that reach the hole and unexpectedly enter 3D space.
Electron Color

There's quark color, but that's not really color--it's just an admission by 20th century physicists that numbers are boring.
Size Comparisons

If you shrank the Solar System to the size of Texas, the Houston metro area would be smaller than a grasshopper in Dallas.
Bursa of Fabricius

If an anatomical structure is named for a person, it means they were the only person to have it. Pierre Paul Broca had a special area of his brain that created powerful magnetic fields, enabling him to do 19th century fMRI research.
K-Means Clustering

According to my especially unsupervised K-means clustering algorithm, there are currently about 8 billion types of people in the world.
Code Lifespan

Surely (no one/everyone) will (recognize how flexible and useful this architecture is/spend a huge amount of effort painstakingly preserving and updating this garbage I wrote in 20 minutes)
Planet Killer Comet Margarita

I'll take mine on the rocks, no ice.
Lane Change Highway

I just think lane markers should follow the local magnetic declination.
Runtime

At least there's a general understanding all around that Doctor Who is its own thing.
Methodology Trial

If you think THAT'S unethical, you should see the stuff we approved via our Placebo IRB.
Sunspot Cycle

Who can forget the early 2010s memes? 'You know you're a 90s kid if you remember the feeling of warm sunlight on your face.' 'Only 90s kids remember the dawn.'
Washing Machine Settings

I guess the engineers who built my dishwasher MIGHT have some insight into how to load it, but instead of reading the booklet they gave me, it seems easier to experiment for years and then get in arguments so heated that I get banned from Quora.
Outdated Periodic Table

Researchers claim to have synthesized six additional elements in the second row, temporarily named 'pentium' through 'unnilium'.
Etymonline

NOTE TO FUTURE ETYMONLINGUISTS: Our best guess is that 'blimp' is onomatopoeia. The 'B-Limp' thing is a folk etymology.
Euler Diagrams

Things Leonhard Euler created ( most of math ( overlapping circle diagrams ) a cricket bowling machine ) Things John Venn created
Biology vs Robotics

Sorry, I've just always had these random things I don't like--like olives, or robots drilling holes in me without warning.
Hydrogen Isotopes

Oops, All Neutrons is also known as Neutral Quadrium, Nydnonen, and Goth Tritium.
New Year's Eve Party
![[Earlier, at the eye doctor] 'No, for the last time, the numerals on the paper aren't my prescription, it's the shape I want you to make with the laser.'](https://imgs.xkcd.com/comics/new_years_eve_party.png)
[Earlier, at the eye doctor] 'No, for the last time, the numerals on the paper aren't my prescription, it's the shape I want you to make with the laser.'
L6 Lagrange Point

It's difficult to orbit L6 stably due to gravitational perturbation from Akron and Toledo.
Game Night Ordering

One good trick, if you get called on a fake service, is to build a working version of it and mention it again the next week.
Pando

The presents under the tree are actually a single gift connected by an underground ribbon system.
Cold Complaints

Our investigation into whining-based remedies became the first study to be halted by the IRB on the grounds that the treatment group was 'too annoying.'
Data Point

In general you should only include your single best data point in the paper. The rest of the data can go in the supplementary materials.
Gravity

It's a long way down.
Optimal Bowling

If you want to bowl a strike, the optimal place is almost certainly inside a bowling alley, although with a little luck any establishment uphill from one could also work.
Hydropower Breakthrough

A hydroelectric dam is also known as a heavy water reactor.
Solar System Model

The Earth is, on average, located in the habitable zone, but at any given time it has a certain probability of being outside it, which is why life exists on Earth but is mortal.
Mystery Asterisk Destination

If you ever see the † dagger symbol with no unmatched footnote, it means the writer is saying the phrase while threatening you with a dagger.
Astronomy Numbers

I adopted a cat that weighs 12 solar masses. Laser pointers love chasing it.
Bendy

Squaring the circle is really easy with some good clamps.
Spacetime Soccer
![Spacetime Soccer, known outside the United States as '4D Football' is a now-defunct sport. Infamous for referee decisions hinging on inconsistent definitions of simultaneity, it is also known for the disappearance of many top players during... [more]](https://imgs.xkcd.com/comics/spacetime_soccer.png)
Spacetime Soccer, known outside the United States as '4D Football' is a now-defunct sport. Infamous for referee decisions hinging on inconsistent definitions of simultaneity, it is also known for the disappearance of many top players during... [more]
Faucet

It's okay, they can figure out which control positions produce scalding water via a trial-and-error feedback loop with a barely-perceptible 10-second lag.
Paper Title

CONFLICT OF INTEREST STATEMENT: The authors hope these results are correct because we all want to be cool people who are good at science.
What If 2 Gift Guide

BABIES OR LITERATURE BUT NOT BOTH: Baby shoes
Change in Slope

Squinting at a graph is fine for getting a rough idea of the answer, but if you want to pretend to know it exactly, you need statistics.
Account Problems

My password is just every Unicode codepoint concatenated into a single UTF-8 string.
Feature Comparison

Below the Web, and the Dark Web, a shadowy parallel world of Cybiko users trade messages on the Translucent Neon Plastic Web.
Bad Date

"Even split between us, this will pay way better than the Jumanji sponsorship I came into the date with."
Y2K and 2038

It's taken me 20 years, but I've finally finished rebuilding all my software to use 33-bit signed ints.
Precision vs Accuracy

'Barack Obama is much less likely than the average cat to jump in and out of cardboard boxes for fun' is low precision, but I'm not sure about the accuracy.
Soil

You might want to bring your frost-sensitive plants in from the patio. The high-level aerosols may result in short-term cooling across the entire backyard.
Königsberg

At first I thought I would need some gold or something to pay him, but then I realized that it was the 18th century and I could just bring a roll of aluminum foil.
Wirecutter Recommendation

Their 'best philosophy of epistemology' picks are great, but you can tell they're struggling a little in the 'why you should trust us' section.
Interior Decorating

It all came flat-packed in Pandora's Box.
Encryption

WARNING: PEOPLE NAMED EVE ARE PROHIBITED FROM INSTALLING THIS APP!
Cool S

Although I hear they were caught cheating off of Rosalind, who sat at a desk in front of them.
Fermat's First Theorem

Mathematicians quickly determined that it spells ANT BNECN, an unusual theoretical dish which was not successfully cooked until Andrew Wiles made it for breakfast in the 1990s.
Bubble Universes

The theory finally unifies cosmic inflation and regular inflation.
Division Notation

Science tip: Scientists hardly ever use the two-dot division sign, and when they do it often doesn't even mean division, but they still get REALLY mad when you repurpose it to write stuff like SALE! ALL SHOES 30÷ OFF!
Space Adventure

"Sir, it looked really cool." "Oh no--prestige TV. Okay, which of you has a terrible secret that's being slowly revealed to the audience through flashbacks? Just spit it out so we can escape this arc!"
2045

"Sorry, doctor, I'm going to have to come in on a different day--I have another appointment that would be really hard to move, in terms of the kinetic energy requirements."
Road Space Comparison

I wonder how hard it would be to ride an electric scooter in a hamster ball.
Fan Theories

The universe fandom is great. Such sweet and enthusiastic people.
Easy or Hard
!["Friction-driven static electrification is familiar and fundamental in daily life, industry, and technology, but its basics have long been unknown and have continually perplexed scientists from ancient Greece to the high-tech era. [...] To date, no single theory can satisfactorily explain this mysterious but fundamental phenomenon." --Eui-Cheol Shin et. al. (2022)](https://imgs.xkcd.com/comics/easy_or_hard.png)
"Friction-driven static electrification is familiar and fundamental in daily life, industry, and technology, but its basics have long been unknown and have continually perplexed scientists from ancient Greece to the high-tech era. [...] To date, no single theory can satisfactorily explain this mysterious but fundamental phenomenon." --Eui-Cheol Shin et. al. (2022)
Archimedes Principle

"I've always wanted to run naked through town, but I don't want to get in trouble with the king or be remembered by history as a weirdo. I wonder how I could ... EUREKA!"
Battery Life

It's okay, I'm at 10%, so I'm good for another month or two.
Quantified Self

It's made me way more excited about ferris wheels, subways, car washes, waterslides, and store entrances that have double doors with a divider in the middle.
Wing Lift

Once the air from the top passes below the plane of the wing and catches sight of the spooky skulls, it panics, which is the cause of turbulent vortices.