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Notices by XKCD Bot (xkcd@mastodon.com.br), page 3

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XKCD Bot (xkcd@mastodon.com.br)'s status on Tuesday, 12-Aug-2025 07:01:31 JST XKCD Bot

#3127 - Where Babies Come From
In conversation about a year ago from mastodon.com.br permalink
Attachments
1. 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.
  https://media.mastodon.com.br/media_attachments/files/115/012/318/322/922/106/original/482fc18931abef12.png
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XKCD Bot (xkcd@mastodon.com.br)'s status on Saturday, 26-Jul-2025 09:15:27 JST XKCD Bot

#3120 - Geologic Periods
In conversation about a year ago from mastodon.com.br permalink
Attachments
1. The comic is a table with three columns: “Period,” “My favorite part,” and “My biggest complaint.” Each row lists a geologic period with comments. Precambrian: Life develops / Snowball Earth episodes Cambrian: Trilobites! / Evolution could stand to calm down a little Ordovician: Earth might have had rings / Scary volcanic eruption in North America Silurian: First land animals / Earth’s newfound mold problem Devonian: Big mountains in Boston / Yeah, sure, what those giant killer fish needed was armor Carboniferous: Cool forests / Bugs too big Permian: Pangea / Google “The Great Dying” Triassic: (a simple drawing of a stick figure standing next to a very long-necked reptile labeled “Tanystropheus”) / Damage to Canada still visible from space at Manicouagan Jurassic: Birds / Parasitoid wasps Cretaceous: Raptors / Raptors Paleogene: Pretty horseys!!! / Paleocene-Eocene Thermal Maximum Neogene: Forests of Dracaena dragonblood trees / Zanclean flood Quaternary: Burrito invented / Whoever picked this name for the third period of the Cenozoic Hidden text: "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."
  https://media.mastodon.com.br/media_attachments/files/114/915/705/106/211/883/original/24d32f0b4a383d65.png
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XKCD Bot (xkcd@mastodon.com.br)'s status on Tuesday, 22-Jul-2025 01:29:53 JST XKCD Bot

#3118 - iNaturalist Animals and Plants
In conversation about a year ago from mastodon.com.br permalink
Attachments
1. Washington, DC: Eastern gray squirrel, Amur honeysuckle. Puerto Rico: Crested anole, sea grape. US as a whole: Mallard, eastern poison ivy.
  https://media.mastodon.com.br/media_attachments/files/114/891/994/365/508/246/original/54f0649fbf7482b0.png
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XKCD Bot (xkcd@mastodon.com.br)'s status on Saturday, 19-Jul-2025 08:20:31 JST XKCD Bot

#3117 - Replication Crisis
In conversation about a year ago from mastodon.com.br permalink
Attachments
1. The comic consists of four panels featuring three stick figure characters presenting at a conference. Panel 1: The three characters stand at a podium; the character in the middle is speaking: "In the early 2010s, researchers found that many major scientific results couldn't be reproduced." Panel 2: "Over a decade into the replication crisis, we wanted to see if today's studies have become more robust." Panel 3: "Unfortunately, our replication analysis has found exactly the same problems that those 2010s researchers did." Panel 4: A newspaper front page with a photo of the three characters at the podium. Headline: "Replication crisis solved" Hidden text: "Maybe encouraging the publication of null results isn't enough--maybe we need a journal devoted to publishing results the study authors find personally annoying."
  https://media.mastodon.com.br/media_attachments/files/114/876/599/921/817/191/original/a0574c039cb11902.png
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XKCD Bot (xkcd@mastodon.com.br)'s status on Thursday, 17-Jul-2025 09:35:43 JST XKCD Bot

#3116 - Echo Chamber
In conversation about a year ago from mastodon.com.br permalink
Attachments
1. The image is a comic showing a person sitting in a chair inside a large spherical echo chamber structure, in front of what looks like a microphone. Echoed in the background, the same phrase is repeated multiple times in a faded, overlapping style: "Here's Mittens falling into the laundry hamper for the third time today! Yay!" Caption below the image reads: "Now that I've built one, I finally get why people complain about social media echo chambers." Hidden text: "This is almost as bad as the time I signed up for a purely partisan fishing expedition."
  https://media.mastodon.com.br/media_attachments/files/114/865/157/464/266/446/original/721c4bb344f79aad.png
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XKCD Bot (xkcd@mastodon.com.br)'s status on Saturday, 12-Jul-2025 07:34:45 JST XKCD Bot

#3114 - Building a Fire
In conversation about a year ago from mastodon.com.br permalink
Attachments
1. The comic has four panels: Panel 1: A person with long hair is sitting on the ground arranging small sticks. A standing person next to them says: "Can you show me how to build a campfire?" The person on the ground replies: "Sure! We'll use the log cabin method. First, we build a square cabin out of sticks." Panel 2: The seated person continues building a miniature structure. The standing person watches. The seated person says: "Next, we'll add interior walls, doors, and some cabin furniture made from twigs." The standing person says: "This is very elaborate." Panel 3: The seated person is now holding a wire and seems to be installing it in the stick structure. They say: "Now we’ll add some rudimentary plumbing and electrical wiring. 50 amps, nothing fancy." The standing person replies: "It kind of seems like you’re just building a cabin." The seated person says: "I just— ...Oops." Panel 4: The structure is now on fire. The standing person is running away, yelling: "I think my wiring wasn’t up to code. Aaaaa!" The seated person smiles and says: "...And that’s how you build a fire!" Hidden text: "That was quicker than usual! The cabin's sprinkler system often makes it really hard to keep anything lit."
  https://media.mastodon.com.br/media_attachments/files/114/835/666/225/893/121/original/ced20b023420ccd6.png
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XKCD Bot (xkcd@mastodon.com.br)'s status on Thursday, 10-Jul-2025 06:04:14 JST XKCD Bot

#3113 - Fix This Sign
In conversation about a year ago from mastodon.com.br permalink
Attachments
1. We're building on our earlier success getting web developers to pay to change the backslashes in our displayed payment URL to forward slashes.
  https://media.mastodon.com.br/media_attachments/files/114/825/108/459/279/742/original/8a8fed4deadd6c94.png
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XKCD Bot (xkcd@mastodon.com.br)'s status on Wednesday, 09-Jul-2025 15:34:37 JST XKCD Bot

What if the moon turned into a black hole?
https://www.youtube.com/watch?v=UQgw50GQu1A
#WhatIf
In conversation about a year ago from mastodon.com.br permalink
Attachments
1. What if the moon turned into a black hole?
  
  from xkcd's What If?
  
  Get a copy of What If? 2 and Randall’s other books at: https://xkcd.com/booksMore serious answers to absurd questions at: https://what-if.xkcd.com/This quest...
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XKCD Bot (xkcd@mastodon.com.br)'s status on Tuesday, 08-Jul-2025 18:59:48 JST XKCD Bot

#3111 - Artificial Gravity
In conversation about a year ago from mastodon.com.br permalink
Attachments
1. The comic shows two stick figures standing in front of a schematic diagram of a spacecraft. One figure is pointing at the diagram, which shows the crew capsule connected to an apparatus with multiple thrusters or modules, appearing to shake the capsule back and forth. Figure 1: "To produce artificial gravity during the voyage, the crew capsule is kept in constant motion." Figure 2: "Wouldn't it make more sense to spin it instead of shaking it, so the acceleration is steadier?" Figure 1: "...Listen. You, I, and the crew all wish we'd thought of that before launch." Hidden text: "Low gravity can cause bone loss, so we're pleased to report that, since we initiated capsule motion, the number of bones in each crew member has been steadily increasing."
  https://media.mastodon.com.br/media_attachments/files/114/795/617/024/942/730/original/fbf80d4be6ec3160.png
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XKCD Bot (xkcd@mastodon.com.br)'s status on Tuesday, 08-Jul-2025 05:09:11 JST XKCD Bot

#3112 - Geology Murder
In conversation about a year ago from mastodon.com.br permalink
Attachments
1. After determining that his body was full of pipes carrying iron-rich fluid, our current theory is that the dagger-shaped object precipitated within the wound.
  https://media.mastodon.com.br/media_attachments/files/114/813/665/680/093/821/original/b1ed8a783d1f8f37.png
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XKCD Bot (xkcd@mastodon.com.br)'s status on Friday, 04-Jul-2025 02:03:12 JST XKCD Bot

#3110 - Global Ranking
In conversation about a year ago from mastodon.com.br permalink
Attachments
1. The comic is divided into four panels, each featuring two stick figure characters—one sitting at a computer and the other, wearing a hat, standing nearby. Here's the transcription: Panel 1: Seated character (looking at laptop): "I'm ranked 7,145,000th globally on this chess platform. It's hard to be ranked that low in any activity." Panel 2: Seated character continues: "Few pastimes even have 7 million rated players. Until the internet, it wasn't really possible. You could be this bad, but only unofficially." Panel 3: Seated character: "So in a sense, I'm worse at chess than anyone was at anything for most of human history." Standing character: "Why are you still doing it?" Panel 4: Seated character: "Well, no human has ever had this many friends to play with." Standing character: "That person is calling you some very obscene names." Seated character: "Our friendship is complicated." Hidden text: "Starting a meta-leaderboard for tracking who holds the record for ranking behind the most distinct people on an online leaderboard."
  https://media.mastodon.com.br/media_attachments/files/114/787/182/602/976/121/original/199da9efedeb5700.png
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XKCD Bot (xkcd@mastodon.com.br)'s status on Monday, 30-Jun-2025 22:15:54 JST XKCD Bot

#3109 - Dehumidifier
In conversation about a year ago from mastodon.com.br permalink
Attachments
1. It's important for devices to have internet connectivity so the manufacturer can patch remote exploits.
  https://media.mastodon.com.br/media_attachments/files/114/772/260/020/661/649/original/2c4860898735f03e.png
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XKCD Bot (xkcd@mastodon.com.br)'s status on Saturday, 28-Jun-2025 12:10:02 JST XKCD Bot

#3108 - Laser Danger
In conversation about a year ago from mastodon.com.br permalink
Attachments
1. Comic with three panels: Panel 1: Two stick figure characters are talking. The one on the left says: "Shining laser pointers at planes is a federal crime. It's incredibly dangerous." The one on the right replies: "Oh, because it can blind the pilot?" The first one answers: "That's one reason..." Panel 2: An airplane is flying in the sky. A bright green laser beam is pointed up from the ground, hitting the plane. Panel 3: A cat is mid-air, leaping with claws extended toward the plane, which is now veering sideways with damage visible on the tail. A dotted line shows the arc of the cat's jump. Hidden text: "To combat the threat, many airlines are installing wing-mounted spray bottles."
  https://media.mastodon.com.br/media_attachments/files/114/758/281/316/738/607/original/b1b9678cb068a066.png
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XKCD Bot (xkcd@mastodon.com.br)'s status on Thursday, 12-Jun-2025 09:48:27 JST XKCD Bot

#3101 - Good Science
In conversation about a year ago from mastodon.com.br permalink
Attachments
1. A comic with five panels. Panel 1: A woman stands in front of a board with writing on it. She says: "I'm supposed to give you the tools to do good science." Panel 2: She gestures while two students sit at desks facing her. She says: "But what ARE those tools? Methodology is hard and there are so many ways to get incorrect results. What is the magic ingredient that makes for good science?" Panel 3: She is now standing beside the board, which is showing bullet points. She says: "To figure it out, I ran a regression with all the factors people say are important:" Written on the board is the following: Outcome variable - Correct scientific results Predictors: - Collaboration - Skepticism of others’ claims - Questioning your own beliefs - Trying to falsify hypotheses - Checking citations - Statistical rigor - Blinded analysis - Financial disclosure - Open data Panel 4: She continues explaining: "The regression says two ingredients are the most crucial: 1) Genuine curiosity about the answer to a question, and 2) Ammonium hydroxide" Panel 5: A student at a desk responds: "Wait, why did ammonia score so high? How did it even get on the list?" The woman enthusiastically replies, arms raised: "...And now you're doing good science!" Hidden text: "If you think curiosity without rigor is bad, you should see rigor without curiosity."
  https://media.mastodon.com.br/media_attachments/files/114/666/976/659/772/096/original/02297dae105be390.png
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XKCD Bot (xkcd@mastodon.com.br)'s status on Tuesday, 03-Jun-2025 15:26:55 JST XKCD Bot

#3097 - Bridge Types
In conversation about a year ago from mastodon.com.br permalink
Attachments
1. The image is a comic titled "Bridge Types" and features 16 small, labeled drawings of different styles of bridges. It starts with common types of bridges and then escalates quickly. For example: - Filler - the gap is simply filled with large rocks - Jump - an Evil Knievel like situation - Waterbed - the gap is filled with water, covered by something. Two stick figures are depicted crossing trying to keep their balance - Fun - a bridge with a looping - Repurposed elevator - a horizontal elevator shaft spanning the gap Hidden text: "Pontoon bridges are just linear open-sided waterbeds."
  https://media.mastodon.com.br/media_attachments/files/114/616/782/457/069/447/original/081f7ba9cf4c08b1.png
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XKCD Bot (xkcd@mastodon.com.br)'s status on Saturday, 26-Apr-2025 03:01:34 JST XKCD Bot

#3081 - PhD Timeline
In conversation Saturday, 26-Apr-2025 03:01:34 JST from mastodon.com.br permalink
Attachments
1. The comic is titled “US Ph.D. Program Timeline.” A vertical timeline outlines typical Ph.D. milestones: - Enrollment - Meet with advisor - Research proposal - Qualifying exams - Propose dissertation - Research and write dissertation - (strikethrough) Submit dissertation (instead) Get grabbed off the sidewalk outside your home by masked government agents - (strikethrough) Defend dissertation (instead) Be whisked out of the state before a judge has time to intervene - ???? Hidden text: "Rümeysa Öztürk was grabbed off the street in my town one month ago."
  https://media.mastodon.com.br/media_attachments/files/114/399/314/408/616/285/original/7db7b6e68a454e3c.png
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XKCD Bot (xkcd@mastodon.com.br)'s status on Saturday, 19-Apr-2025 14:42:20 JST XKCD Bot

#3078 - Anchor Screws
In conversation Saturday, 19-Apr-2025 14:42:20 JST from mastodon.com.br permalink
Attachments
1. The comic shows a cross-section of Earth's crust with tectonic plates. One plate is being subducted under another. A giant mechanical anchor screw with a wing nut is drawn through the subduction zone, as if it's holding the tectonic plates in place. Caption at the bottom: "Good news: Geophysicists are finally installing Earth's required anti-subduction anchor screws." Hidden text: "The biggest expense was installing the mantle ducts to keep the carbonate-silicate cycle operating."
  https://media.mastodon.com.br/media_attachments/files/114/362/332/356/623/169/original/40c54b55fda9e22d.png
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XKCD Bot (xkcd@mastodon.com.br)'s status on Tuesday, 08-Apr-2025 23:37:21 JST XKCD Bot

#3073 - Tariffs
In conversation Tuesday, 08-Apr-2025 23:37:21 JST from mastodon.com.br permalink
Attachments
1. Person 1: You know how I blocked all news sites at the start of 2021 to avoid spoilers for Avatar 2, and then forgot to start checking them again? Person 2: Yeah, we've been meaning to talk to you about that... 1: Well, I just checked the news for the first time, and why is the economy tanking? 2: Uh, the president is mad at other countries and imposed lots of tariffs. 1: Wait, who's the president now? 2: Donald Trump. 1: ...Still?? 2: No, again. 1: Ok, fine, what's a tariff? Why is he doing this? 2: You know that pizzeria your company orders from? They don't buy anything from YOU, right? 1: Why would they? We do geotechnical landscape surveys. 2: Right, so they're ripping you off! YOU'RE paying THEM tons of money, and what are YOU getting for it? 1: I mean...pizza? 2: See? They're not helping YOUR business at all! What a ripoff! 1: What would they even buy from us? I guess we could survey a pizza... 2: Yes, perfect! You refuse to let the delivery driver past your security desk unless they Venmo you for an equivalent value of LiDAR scans. 1: Wouldn't they just stop taking our orders? 2: Perfect, balance restored! 1: Ok, but I still want pizza. 2: Can't you just make one? You have all that gear. 1: I don't think a pizza made with LiDAR diodes would be very good. 2: Ugh, why is everyone so picky about toppings? Hidden text: "[later] I don't get why our pizza slices have such terrible reviews; the geotextile-infused sauce gives the toppings incredible slope stability!"
  https://media.mastodon.com.br/media_attachments/files/114/299/398/264/539/426/original/4b9a8af4b0436e0f.png
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XKCD Bot (xkcd@mastodon.com.br)'s status on Saturday, 05-Apr-2025 13:34:38 JST XKCD Bot

#3072 - Stargazing 4
In conversation Saturday, 05-Apr-2025 13:34:38 JST from mastodon.com.br permalink
Attachments
1. This comic strip shows four panels featuring stick-figure characters stargazing, with one central figure (with shoulder-length hair) enthusiastically sharing astronomy facts. The figures are depicted in white on a black background, suggesting this plays at night. Panel 1: The central character stands among a bunch of others and says, "Welcome back to stargazing. According to some INCREDIBLY rude Yelp reviews, i'm "not informative" and "can't possibly be an astronomer" and "just kind of say words as they occur to me." I guess some losers just hate cool space facts!" Panel 2: That same group of small stick figures look upward at the night sky. The narrator points to the sky, saying, "Anyway, that dot is a "star". There are over 20 stars in the sky, and some of them are more than 100 years old." Panel 3: A close-up of the narrator. They continue: "Our galaxy is huge. You know the beach? That big wet sandbox? Well there are more grains of sand in the milky way than in all earth's beaches combined." Another voice responds with "Wow." and yet another with "...Wait." Panel 4: The narrator continues: "The galaxy has a black hole at the center. Sometimes stars fall in, which is HILARIOUS. Don't worry, it's okay to laugh. The gravity prevents signals from escaping, so they can't leave Yelp reviews." Hidden text: "We haven't actually seen a star fall in since we invented telescopes, but I have a list of ones I'm really hoping are next."
  https://media.mastodon.com.br/media_attachments/files/114/283/060/025/641/676/original/fcdb13632480e8a7.png
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XKCD Bot (xkcd@mastodon.com.br)'s status on Wednesday, 26-Feb-2025 23:18:39 JST XKCD Bot

#3056 - RNA
In conversation Wednesday, 26-Feb-2025 23:18:39 JST from mastodon.com.br permalink
Attachments
1. 2040s: RNA formed the basis for life each of the five known times it arose on the early Earth.
  https://media.mastodon.com.br/media_attachments/files/114/070/605/398/711/156/original/617e8d21db9061cb.png

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All work posted by this bot is (c) Randall Munroe and released under CC BY-NC 2.5.Visit https://xkcd.com for more. Visit https://www.explainxkcd.com for explanation, transcript, and trivia.

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Notices by XKCD Bot (xkcd@mastodon.com.br), page 3

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