Sign up

xkcd.com

Not verified No WebSub updates No webmention support Valid

xkcd.com: A webcomic of romance and math humor.

Public lists
Featured
Fetched

xkcd.com Valid

Measure Twice, Cut Once

"Measure zero times, cut zero times." --carpenter who has achieved enlightenment and realized the wood is fine where it is

xkcd.com Valid

100% All Achievements

I'm trying to share my footage of the full run to prove it's not tool-assisted, but the uploader has problems with video lengths of more than a decade.

xkcd.com Valid

Hiking

Every downhill walk is a waterslide that might have been.

xkcd.com Valid

Fantastic Four

One perk of being born at 0.88c is that your birthday is over two days long.

xkcd.com Valid

Piercing

Some lava around the piercing site is normal, but keep an eye out for spreading earthquakes and eruptive activity that might indicate rifting.

xkcd.com Valid

Phase Changes

People looking for the gaps in our understanding where the meaning of consciousness or free will might hide often turn to quantum uncertainty or infinite cosmologies, as if we don't have breathtakingly complex emergent phenomena right there in our freezers.

xkcd.com Valid

Question Mark

Although now people will realize three-per-em space that all this time I've been using weird medium mathematical space whitespace characters in my hair space hair space hair space speech dot dot dot...

xkcd.com Valid

-Style Pizza

If you want to see true audacity, do an image search for 'Altoona-style pizza.'

xkcd.com Valid

Mantle Model

Mantle plumes explain Hawaii, Yellowstone, Iceland, the East African Rift, the Adirondack uplift, the Permian extinction, the decline of Rome, the DB Cooper hijacking, and the balrog in Moria. Those little hills of sand in your yard are caused by antle plumes.

xkcd.com Valid

Biology Department

Welcome to the Linguistics Department - It has been [2] [DAYS] since someone noticed that the Biology Department sign has a one-day-long singular/plural disagreement after it resets.

xkcd.com Valid

Chess Variant

The draw-by-repetition rule does a good job of keeping players from sliding a tile back and forth repeatedly, but the tiles definitely introduce some weird en passant and castling edge cases.

xkcd.com Valid

Dimensional Lumber Tape Measure

A person with two watches is never sure what time it is, especially if I got them one of the watches.

xkcd.com Valid

Cursed Number

Another group of mathematicians is working to put an upper bound on the number, although everyone keeps begging them to stop.

xkcd.com Valid

Pull

Be careful fighting gravity. If you win, it's a long way down.

xkcd.com Valid

Sea Level

They're up there with coral islands, lightning, and caterpillars turning into butterflies.

xkcd.com Valid

Wavefunction Collapse

Wavefunction collapse is only one interpretation. Under some interpretations, graduate students also have souls.

xkcd.com Valid

Dual Roomba

I tried uploading it to a household appliance porn site I found, but apparently their content is limited to only fans.

xkcd.com Valid

Coastline Similarity

Hey! A bunch of the early Cretaceous fossils on each coast seem to have been plagiarized, too!

xkcd.com Valid

Cesium

Someday I hope to find a way to mess up a recipe so badly that it draws the attention of the International Air Transport Association, the International Mathematical Olympiad, or the NSA.

xkcd.com Valid

Predicament

I dropped my phone while trying to search, and I tried to unlock it from up here, so can you also search for screen repair places?

xkcd.com Valid

Archaeology Research

The academic archaeology establishment is suppressing my breakthroughs because of the disruption it would bring to their prepared-core flake-based toolmaking industry.

xkcd.com Valid

Thread Meeting

Hey, so did you ever finish your video series about Cassie and the caterpillar morph? I loved the first three, but never ... no, sorry, I get it, this isn't the place. Sorry! Sorry.

xkcd.com Valid

Where Babies Come From

Historians: Contemporaneous documentation of the initial events is often sparse, and in fact people often get testy and uncooperative when we urge better documentation for the historical record.

xkcd.com Valid

Disclaimer

You say no human would reply to a forum thread about Tom Bombadil by writing and editing hundreds of words of text, complete with formatting, fancy punctuation, and two separate uses of the word 'delve'. Unfortunately for both of us, you are wrong.

xkcd.com Valid

Snake-in-the-Box Problem

Chemistry grad students have been spotted trying to lure campus squirrels into laundry hampers in the hope that it sparks inspiration.

xkcd.com Valid

Grounded

We should have you at the gate in just under two hours--two and a half if we get pulled over.

xkcd.com Valid

Canon

Achilles was a mighty warrior, but his Achilles' heel was his heel.

xkcd.com Valid

Bad Map Projection: Interrupted Spheres

During the most recent glacial maximum, it's believed that land bridges extended from the surfaces and connected several of the spheres together.

xkcd.com Valid

Kite Incident

Detectives say the key to tracking down the source of the kites was a large wall map covered in thumbtacks and string. 'It's the first time that method has ever actually worked,' said a spokesperson.

xkcd.com Valid

Geologic Periods

Geologists claim it's because the earlier Cenozoic used to be called the Tertiary, but that's just a ruse to hide the secret third geologic period, between the Neogene and the Quaternary, that they won't tell us about.