xkcd.com

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

Spectrum Allocation

5 Oct 2026

![Rumor has it that they're finally auctioning off the zeppelin navigation bands, but everyone is worried that the scary boat captains will express

Accelerator Energies

2 Oct 2026

![Fans at Daytona always get extra excited when officials decide to introduce some antimatter cars circling the track in the opposite direction.](https://imgs.xkcd.com/comics/accelerator_energies.png

Ground Effect

30 Sep 2026

![Runners looking for aerodynamic advantage typically wear sneakers because some fancy dress shoes can create wingtip vortices.](https://imgs.xkcd.com/comics/ground_effect.png "Runners looking for

Jupiter Icy Moons Explorer

28 Sep 2026

!["I did briefly visit Venus in August 2025, but I figured out the mistake on my own because it didn't have any moons."](https://imgs.xkcd.com/comics/jupiter_icy_moons_explorer.png "\"I did briefly

Slab Graveyard

25 Sep 2026

![It's ok if you want to close close your eyes for the slab graveyard, so you can still have fun riding the mantle plume back up afterward!](https://imgs.xkcd.com/comics/slab_graveyard.png "It's ok

Voyager Instruments

23 Sep 2026

![Convincing him to turn off the stupid laser show and useless sound system was such a huge ordeal that no one has wanted to do it again.](https://imgs.xkcd.com/comics/voyager_instruments.png

Stargazing 5

21 Sep 2026

![The sun and the moon appear the same size in the sky, even though in real life the sun is more than twice as big. Some call this lucky alignment coincidence; others say it's proof that sometimes

Tyrannosaurus

18 Sep 2026

![Many of the smaller dinosaurs seem to have largely preyed on housecats.](https://imgs.xkcd.com/comics/tyrannosaurus.png "Many of the smaller dinosaurs seem to have largely preyed on housecats.")

Summer

16 Sep 2026

![You should probably get back to shore before spring hits.](https://imgs.xkcd.com/comics/summer.png "You should probably get back to shore before spring hits.")

Aerospace Flowchart

14 Sep 2026

![Someday, we will find the problem that goes with this solution.](https://imgs.xkcd.com/comics/aerospace_flowchart.png "Someday, we will find the problem that goes with this solution.")

OH Scale

11 Sep 2026

![To access distant parts of the project, I ended up building a regular-scale passenger train inside each rail.](https://imgs.xkcd.com/comics/oh_scale.png "To access distant parts of the project, I

Fault Taunting

9 Sep 2026

![One of the first things they teach you is to NEVER play with the geology toy over a mantle hotspot.](https://imgs.xkcd.com/comics/fault_taunting.png "One of the first things they teach you is to

Semaphore

7 Sep 2026

![The speed of light in air is 50% faster than in fiber, but it's a challenge to get the arms to move fast enough to realize the latency advantage.](https://imgs.xkcd.com/comics/semaphore.png "The

Asteroid Mission

4 Sep 2026

![Lander, this is Houston. There's been a request that you turn clipping back on and instead set the mass to 1kg. The theorists believe that will be pretty