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@xkcd-bot.bsky.social

A bot for BlueSky that posts xkcd comics, shows the alt text, and links to the Explain xkcd site. By @perevillega.com

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Latest posts by xkcd-bot.bsky.social on Bluesky

This dating is corroborated by the presence of stone tools at the site, rather than earlier and less effective helium ones.

This dating is corroborated by the presence of stone tools at the site, rather than earlier and less effective helium ones.

Carbon Dating
https://xkcd.com/3205/

This dating is corroborated by the presence of stone tools at the site, rather than earlier and less effective helium ones.

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3205

10.02.2026 04:35 — 👍 13    🔁 3    💬 0    📌 0
Staplers are actually in Pseudosuchia, making them more closely related to crocodiles than to dinosaurs.

Staplers are actually in Pseudosuchia, making them more closely related to crocodiles than to dinosaurs.

Dinosaurs And Non-Dinosaurs
https://xkcd.com/3204/

Staplers are actually in Pseudosuchia, making them more closely related to crocodiles than to dinosaurs.

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3204

06.02.2026 19:31 — 👍 4    🔁 0    💬 0    📌 0
The discovery of a fully typographical star system comes with a big asterisk.

The discovery of a fully typographical star system comes with a big asterisk.

Binary Star
https://xkcd.com/3203/

The discovery of a fully typographical star system comes with a big asterisk.

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3203

05.02.2026 04:59 — 👍 6    🔁 0    💬 0    📌 0
Originally, the ceremony used a variety of rodents and mustelids, but over time most people agreed it made sense to standardize on a specific individual ground squirrel in Pennsylvania.

Originally, the ceremony used a variety of rodents and mustelids, but over time most people agreed it made sense to standardize on a specific individual ground squirrel in Pennsylvania.

Groundhog Day Meaning
https://xkcd.com/3202/

Originally, the ceremony used a variety of rodents and mustelids, but over time most people agreed it made sense to standardize on a specific individual ground squirrel in Pennsylvania.

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3202

02.02.2026 16:20 — 👍 17    🔁 5    💬 0    📌 0
There's also a proof without content of a conjecture without content, but it's left as an exercise for the reader.

There's also a proof without content of a conjecture without content, but it's left as an exercise for the reader.

Proof Without Content
https://xkcd.com/3201/

There's also a proof without content of a conjecture without content, but it's left as an exercise for the reader.

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3201

30.01.2026 17:46 — 👍 7    🔁 3    💬 1    📌 0
Some of the atoms in the molecule are very weakly bound.

Some of the atoms in the molecule are very weakly bound.

Chemical Formula
https://xkcd.com/3200/

Some of the atoms in the molecule are very weakly bound.

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3200

28.01.2026 20:13 — 👍 7    🔁 1    💬 0    📌 0
'Ugh, I'm never going to be like spiders. My descendants will all just be normal arthropods who mind their own busines and don't do anything weird.' --The ancestor of a bunch of eusocial insects

'Ugh, I'm never going to be like spiders. My descendants will all just be normal arthropods who mind their own busines and don't do anything weird.' --The ancestor of a bunch of eusocial insects

Early Arthropods
https://xkcd.com/3199/

(alt-text too long for a BlueSky message, see image alt-text instead)

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3199

27.01.2026 00:11 — 👍 10    🔁 1    💬 0    📌 0
'Oh, and can I borrow 50 sacks of loose flour, a pile of lithium-ion batteries, a bucket of bleach, and a bucket of vinega--' 'NO!!!!!!'

'Oh, and can I borrow 50 sacks of loose flour, a pile of lithium-ion batteries, a bucket of bleach, and a bucket of vinega--' 'NO!!!!!!'

Double-Pronged Extension Cord
https://xkcd.com/3198/

'Oh, and can I borrow 50 sacks of loose flour, a pile of lithium-ion batteries, a bucket of bleach, and a bucket of vinega--' 'NO!!!!!!'

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3198

24.01.2026 02:03 — 👍 17    🔁 3    💬 0    📌 1
Unfortunately, my scheme to trick NASA has now taken over a decade longer than planned and has run way over budget.

Unfortunately, my scheme to trick NASA has now taken over a decade longer than planned and has run way over budget.

Cost Savings
https://xkcd.com/3197/

Unfortunately, my scheme to trick NASA has now taken over a decade longer than planned and has run way over budget.

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3197

21.01.2026 23:01 — 👍 7    🔁 0    💬 0    📌 0
I've had countless nights where the line never left the bottom zone of the graph, but the few moments where it's climbed all the way to the top have made up for them all.

I've had countless nights where the line never left the bottom zone of the graph, but the few moments where it's climbed all the way to the top have made up for them all.

Aurora Coolness
https://xkcd.com/3196/

I've had countless nights where the line never left the bottom zone of the graph, but the few moments where it's climbed all the way to the top have made up for them all.

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3196

20.01.2026 02:29 — 👍 5    🔁 0    💬 0    📌 2
Welcome to the International Space Station Exclamation Point!

Welcome to the International Space Station Exclamation Point!

International Station
https://xkcd.com/3195/

Welcome to the International Space Station Exclamation Point!

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3195

16.01.2026 14:54 — 👍 6    🔁 2    💬 1    📌 0
Some surfaces may seem difficult to glue. But if you research the materials, find tables of what adhesives work on them, and prepare your surfaces carefully, you can fail to glue them in a fun NEW way that fills your house with dangerous vapors.

Some surfaces may seem difficult to glue. But if you research the materials, find tables of what adhesives work on them, and prepare your surfaces carefully, you can fail to glue them in a fun NEW way that fills your house with dangerous vapors.

16 Part Epoxy
https://xkcd.com/3194/

(alt-text too long for a BlueSky message, see image alt-text instead)

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3194

14.01.2026 19:52 — 👍 5    🔁 0    💬 1    📌 0
I wanted to make the world's fastest yawl, so I made the aft sail bigger, but apparently that means it's not a yawl anymore! It's a real ketch-22.

I wanted to make the world's fastest yawl, so I made the aft sail bigger, but apparently that means it's not a yawl anymore! It's a real ketch-22.

Sailing Rigs
https://xkcd.com/3193/

I wanted to make the world's fastest yawl, so I made the aft sail bigger, but apparently that means it's not a yawl anymore! It's a real ketch-22.

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3193

13.01.2026 04:50 — 👍 6    🔁 1    💬 0    📌 0
We're going to need to modify the surface to mount it on the test stand. Which ocean basin do you like the least?

We're going to need to modify the surface to mount it on the test stand. Which ocean basin do you like the least?

Planetary Alignment
https://xkcd.com/3192/

We're going to need to modify the surface to mount it on the test stand. Which ocean basin do you like the least?

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3192

10.01.2026 05:31 — 👍 8    🔁 2    💬 0    📌 0
It's important to teach yourself to feel responsible for random events, because with great responsibility comes great power. That's what my wise Uncle Ben told me right before he died; he might still be alive today if only I'd said rabbit rabbit that year!

It's important to teach yourself to feel responsible for random events, because with great responsibility comes great power. That's what my wise Uncle Ben told me right before he died; he might still be alive today if only I'd said rabbit rabbit that year!

Superstition
https://xkcd.com/3191/

(alt-text too long for a BlueSky message, see image alt-text instead)

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3191

07.01.2026 19:58 — 👍 7    🔁 0    💬 0    📌 0
Some people argue that the tension and compression in the human skeleton is technically tensegrity, but it's missing the defining characteristic: making people say 'wtf, how is that thing floating?' when they see it.

Some people argue that the tension and compression in the human skeleton is technically tensegrity, but it's missing the defining characteristic: making people say 'wtf, how is that thing floating?' when they see it.

Tensegrity
https://xkcd.com/3190/

(alt-text too long for a BlueSky message, see image alt-text instead)

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3190

06.01.2026 03:26 — 👍 4    🔁 1    💬 0    📌 0
They're not generally used for crewed spacecraft because astronauts HATE going around the corners.

They're not generally used for crewed spacecraft because astronauts HATE going around the corners.

Conic Sections
https://xkcd.com/3189/

They're not generally used for crewed spacecraft because astronauts HATE going around the corners.

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3189

03.01.2026 01:53 — 👍 7    🔁 1    💬 0    📌 1
Anyone else watching this Youtube video in 1954? If so, my last trip definitely messed with the timeline.

Anyone else watching this Youtube video in 1954? If so, my last trip definitely messed with the timeline.

Anyone Else Here
https://xkcd.com/3188/

Anyone else watching this Youtube video in 1954? If so, my last trip definitely messed with the timeline.

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3188

31.12.2025 22:20 — 👍 12    🔁 1    💬 0    📌 0
1,300,000-1,400,000 ft: Ask a crew member to show you how to use the ISS food warmer.

1,300,000-1,400,000 ft: Ask a crew member to show you how to use the ISS food warmer.

High Altitude Cooking Instructions
https://xkcd.com/3187/

1,300,000-1,400,000 ft: Ask a crew member to show you how to use the ISS food warmer.

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3187

29.12.2025 23:48 — 👍 10    🔁 3    💬 0    📌 0
Building Inspectors HATE This One Weird Trick

Building Inspectors HATE This One Weird Trick

Truly Universal Outlet
https://xkcd.com/3186/

Building Inspectors HATE This One Weird Trick

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3186

26.12.2025 16:31 — 👍 6    🔁 2    💬 0    📌 0
Vertebrae Georg

Vertebrae Georg

Sauropods
https://xkcd.com/3185/

Vertebrae Georg

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3185

25.12.2025 01:29 — 👍 4    🔁 0    💬 0    📌 0
In 1899, people were walking around shouting '23' at each other and laughing, and confused reporters were writing articles trying to figure out what it meant.

In 1899, people were walking around shouting '23' at each other and laughing, and confused reporters were writing articles trying to figure out what it meant.

Funny Numbers
https://xkcd.com/3184/

In 1899, people were walking around shouting '23' at each other and laughing, and confused reporters were writing articles trying to figure out what it meant.

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3184

23.12.2025 04:57 — 👍 14    🔁 3    💬 1    📌 1
My goal in life is to be personally responsible for at least one sports rule change.

My goal in life is to be personally responsible for at least one sports rule change.

Pole Vault Pole
https://xkcd.com/3183/

My goal in life is to be personally responsible for at least one sports rule change.

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3183

20.12.2025 04:24 — 👍 21    🔁 6    💬 0    📌 1
I'm trying to buy a gravitational lens for my camera, but I can't tell if the manufacturers are listing comoving focal length or proper focal length.

I'm trying to buy a gravitational lens for my camera, but I can't tell if the manufacturers are listing comoving focal length or proper focal length.

Telescope Types
https://xkcd.com/3182/

I'm trying to buy a gravitational lens for my camera, but I can't tell if the manufacturers are listing comoving focal length or proper focal length.

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3182

18.12.2025 00:22 — 👍 9    🔁 0    💬 0    📌 0
Earth's r_jf is approximately 1.5 light-days, leading to general relativity's successful prediction that all the frogs in the Solar System should be found collected on the surface of the Earth.

Earth's r_jf is approximately 1.5 light-days, leading to general relativity's successful prediction that all the frogs in the Solar System should be found collected on the surface of the Earth.

Jumping Frog Radius
https://xkcd.com/3181/

(alt-text too long for a BlueSky message, see image alt-text instead)

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3181

16.12.2025 04:20 — 👍 8    🔁 1    💬 0    📌 0
The experimental math department's budget is under scrutiny for how much they've been spending on trains leaving Chicago at 9:00pm traveling at 45 mph.

The experimental math department's budget is under scrutiny for how much they've been spending on trains leaving Chicago at 9:00pm traveling at 45 mph.

Apples
https://xkcd.com/3180/

The experimental math department's budget is under scrutiny for how much they've been spending on trains leaving Chicago at 9:00pm traveling at 45 mph.

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3180

12.12.2025 23:16 — 👍 5    🔁 0    💬 0    📌 1
'That's definitely above the catch-and-release size minimum for planetesimals.' 'I'm going to throw it back anyway.'

'That's definitely above the catch-and-release size minimum for planetesimals.' 'I'm going to throw it back anyway.'

Fishing
https://xkcd.com/3179/

'That's definitely above the catch-and-release size minimum for planetesimals.' 'I'm going to throw it back anyway.'

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3179

11.12.2025 03:14 — 👍 17    🔁 4    💬 0    📌 0
Our models fall apart where the three theories overlap; we're unable to predict what happens when a nanometer-sized squirrel eats a grapefruit with the mass of the sun.

Our models fall apart where the three theories overlap; we're unable to predict what happens when a nanometer-sized squirrel eats a grapefruit with the mass of the sun.

Hyperacute Interdynamics
https://xkcd.com/3178/

Our models fall apart where the three theories overlap; we're unable to predict what happens when a nanometer-sized squirrel eats a grapefruit with the mass of the sun.

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3178

09.12.2025 02:12 — 👍 13    🔁 1    💬 1    📌 1
Luckily, the range is limited by the fact that the square boundary lines follow great circles.

Luckily, the range is limited by the fact that the square boundary lines follow great circles.

Chessboard Alignment
https://xkcd.com/3177/

Luckily, the range is limited by the fact that the square boundary lines follow great circles.

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3177

06.12.2025 02:39 — 👍 5    🔁 0    💬 0    📌 0
Some tires are marketed as 'all-shape tires,' but if driven in a climate with both inverted catenary falls and triangle falls, they wear out really fast.

Some tires are marketed as 'all-shape tires,' but if driven in a climate with both inverted catenary falls and triangle falls, they wear out really fast.

Inverted Catenaries
https://xkcd.com/3176/

Some tires are marketed as 'all-shape tires,' but if driven in a climate with both inverted catenary falls and triangle falls, they wear out really fast.

Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3176

04.12.2025 02:06 — 👍 4    🔁 1    💬 0    📌 0

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