Satellite Imagery https://xkcd.com/3173/ Every weekend I take an ATV out into the desert and spend a day tracing a faint "(C) GOOGLE 2009" watermark across the landscape. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3173

Fifteen Years https://xkcd.com/3172/ "Want to feel old?" "Yes." Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3172

Geologic Core Sample https://xkcd.com/3171/ If you drill at the right angle and time things perfectly, your core sample can include a section of a rival team's coring equipment. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3171

Service Outage https://xkcd.com/3170/ Now, if it were the *Canon* wiki, it's possible to imagine someone with a productivity-related reason for consulting it, but no one's job requires them to read that much about Admiral Daala. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3170

EPIRBs https://xkcd.com/3169/ 'Oh no, the box is drifting out into the harbor!' 'Yeah, I wouldn't worry about losing it.' Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3169

Beam Dump https://xkcd.com/3168/ We're adding some industrial flypaper to minimize reflection or scattering of customers who might complain. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3168

Car Size https://xkcd.com/3167/ 'They really shouldn't let those small cars drive in traffic. I worry I'm going to kill someone if I hit one! They should have to drive on the sidewalk, safely out of the way.' Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3167

Big and Little Spoons https://xkcd.com/3166/ Are you the annoying spoon or the sleepy spoon? Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3166

Earthquake Prediction Flowchart https://xkcd.com/3165/ At least people who make religious predictions of the apocalypse have an answer to the question 'Why didn't you predict any of the other ones that happened recently?' Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3165

Metric Tip https://xkcd.com/3164/ The package weighs 7 kg 9 oz. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3164

Repair Video https://xkcd.com/3163/ The statue should be in the likeness of whatever sculptor posted the sculpting tool repair video that was most helpful during the installation of the statue. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3163

Heart Mountain https://xkcd.com/3162/ Even geology papers about Heart Mountain are like, "Look, we all agree this 'volcanic gas earthquake hovercraft' thing seems like it can't possibly be right, but..." Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3162

Airspeed https://xkcd.com/3161/ Carefully maneuvering the balloon down a mineshaft in an effort to break the OTHER altitude record Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3161

Document Forgery https://xkcd.com/3160/ It comes with a certificate of authenticity, which comes with a certificate of authenticity, which comes with a... Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3160

Continents https://xkcd.com/3159/ (alt-text too long for a BlueSky message, see image alt-text instead) Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3159

Shielding Chart https://xkcd.com/3158/ Sharks can occasionally travel short distances through air when pursuing prey, but their attenuation coefficient is pretty high. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3158

Emperor Palpatine https://xkcd.com/3157/ Many things about Star Wars were not well planned out, but having a 37-year-old in old-age makeup play the Emperor in Return of the Jedi was such an incredible call. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3157

Planetary Rings https://xkcd.com/3156/ (alt-text too long for a BlueSky message, see image alt-text instead) Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3156

Physics Paths https://xkcd.com/3155/ If nothing else, that reasoning definitely overturns syllogisms. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3155

Physics Insight https://xkcd.com/3154/ When Galileo dropped two weights from the Leaning Tower of Pisa, they put him in the history books. But when I do it, I get 'detained by security' for 'injuring several tourists.' Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3154

Hot Water Balloon https://xkcd.com/3153/ (alt-text too long for a BlueSky message, see image alt-text instead) Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3153

Skateboard https://xkcd.com/3152/ I understand it's hard to do more than 300 feet on these 90-second rush jobs, but with a smaller ramp I'm worried the gee forces will be too high for me to do any tricks. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3152

Window Screen https://xkcd.com/3151/ The Nobel Prize in Physiology or Medicine or Home Improvement or DIY Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3151

Ping https://xkcd.com/3150/ Progress on getting shipwrecked sailors to adopt ICMPv6 has been slow. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3150

Measure Twice, Cut Once https://xkcd.com/3149/ "Measure zero times, cut zero times." --carpenter who has achieved enlightenment and realized the wood is fine where it is Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3149

100% All Achievements https://xkcd.com/3148/ 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. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3148

Hiking https://xkcd.com/3147/ Every downhill walk is a waterslide that might have been. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3147

Fantastic Four https://xkcd.com/3146/ One perk of being born at 0.88c is that your birthday is over two days long. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3146

Piercing https://xkcd.com/3145/ Some lava around the piercing site is normal, but keep an eye out for spreading earthquakes and eruptive activity that might indicate rifting. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3145

Phase Changes https://xkcd.com/3144/ (alt-text too long for a BlueSky message, see image alt-text instead) Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3144

Question Mark https://xkcd.com/3143/ (alt-text too long for a BlueSky message, see image alt-text instead) Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3143

<City>-Style Pizza https://xkcd.com/3142/ If you want to see true audacity, do an image search for 'Altoona-style pizza.' Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3142

Mantle Model https://xkcd.com/3141/ (alt-text too long for a BlueSky message, see image alt-text instead) Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3141

Biology Department https://xkcd.com/3140/ 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. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3140

Chess Variant https://xkcd.com/3139/ 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. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3139

Dimensional Lumber Tape Measure https://xkcd.com/3138/ A person with two watches is never sure what time it is, especially if I got them one of the watches. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3138

Cursed Number https://xkcd.com/3137/ Another group of mathematicians is working to put an upper bound on the number, although everyone keeps begging them to stop. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3137

Pull https://xkcd.com/3136/ Be careful fighting gravity. If you win, it's a long way down. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3136

Sea Level https://xkcd.com/3135/ They're up there with coral islands, lightning, and caterpillars turning into butterflies. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3135

Wavefunction Collapse https://xkcd.com/3134/ Wavefunction collapse is only one interpretation. Under some interpretations, graduate students also have souls. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3134

Dual Roomba https://xkcd.com/3133/ I tried uploading it to a household appliance porn site I found, but apparently their content is limited to only fans. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3133

Coastline Similarity https://xkcd.com/3132/ Hey! A bunch of the early Cretaceous fossils on each coast seem to have been plagiarized, too! Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3132

Cesium https://xkcd.com/3131/ 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. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3131

Predicament https://xkcd.com/3130/ 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? Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3130

Archaeology Research https://xkcd.com/3129/ The academic archaeology establishment is suppressing my breakthroughs because of the disruption it would bring to their prepared-core flake-based toolmaking industry. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3129

Thread Meeting https://xkcd.com/3128/ 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. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3128

Where Babies Come From https://xkcd.com/3127/ (alt-text too long for a BlueSky message, see image alt-text instead) Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3127

Disclaimer https://xkcd.com/3126/ (alt-text too long for a BlueSky message, see image alt-text instead) Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3126

Snake-in-the-Box Problem https://xkcd.com/3125/ Chemistry grad students have been spotted trying to lure campus squirrels into laundry hampers in the hope that it sparks inspiration. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3125

Grounded https://xkcd.com/3124/ We should have you at the gate in just under two hours--two and a half if we get pulled over. Explain xkcd: https://www.explainxkcd.com/wiki/index.php/3124