Cities and Transport
The built environment and movement: urban planning, housing, buildings, infrastructure, aviation, and travel.
#5759: Why Servers Have Two Power Cords
Dual-corded servers, transfer switches, and the layered engineering behind keeping data centers online.
#5758: Why Your Outlet Is 120 Volts and Europe's Is 230
The US isn't really a 120-volt country — it's 120/240 split-phase. Here's the engineering logic behind the numbers on your panel.
#5751: Designing Rooms for ADHD Brains
UK standard PAS 6463 and EEG studies reveal how ADHD brains respond to light, noise, and layout — and what that means for home design.
#5750: Neurodesign: Building for the Human Nervous System
What if a building could restore your attention instead of draining it? Inside the emerging field of neuroarchitecture.
#5748: What's Actually Inside an eSIM Adapter
An eSIM adapter isn't a converter — it's a eUICC chip in a SIM shell. Here's the silicon, the certificates, and the open source tools underneath.
#5745: Why Europlugs Fit Israeli Sockets So Badly
A 2.5-amp plug, a 16-amp socket, and half a millimeter of interference. The physics of a connection that was never meant to hold.
#5742: What Neuroarchitecture Says About Your Desk
A technologist and his architect wife disagree about rooms. Turns out neuroscience has a lot to say about who's right.
#5733: Why Your Raspberry Pi's Wi-Fi Keeps Dropping
The antenna on your Pi isn't the problem — where it sits is. What actually keeps an SBC link alive.
#5732: Why You Own 40 Unlabeled Power Supplies
Three standards bodies tried to fix DC connectors. The box of mystery bricks in your closet is the result.
#5730: What 4 Gs Actually Does to a Body at 17,000 Feet
A cockpit door left open, a passenger who knew one thing, and two off-duty pilots in row 30. What the physics of that descent really felt like.
#5726: Vetting Pilots: The Flydubai 1073 Questions
A crash-axe attack over Israel raises five hard questions about who actually vets flight crews — and whether route-specific screening can work.
#5721: What's the Red and Black Speaker Cable Actually Called?
It's called zip cord — and the gauge you need depends entirely on current, not the 300V printed on the jacket.
#5718: How Far Can You Run RCA, XLR, and 3.5mm Cables?
Published cable-length advice ranges from 3 meters to 200 feet. The physics explains why — and why the cable isn't the variable that matters.
#5717: What It Takes to Land on the Moon Again
Artemis II flew by the Moon in 2026. Artemis IV plans to land in 2028. The gap between those two missions is enormous.
#5713: Who Rescues You at the Ends of the Earth?
The Arctic has a binding rescue treaty. Antarctica has nothing. Here's who actually comes when you're stranded at the poles.
#5712: Can NASA Actually Build a Moon Base?
NASA's Moon Base plan is a to-do list, not a physics wall — but the transport chain is the thing standing in the way.
#5711: Ireland's Offshore Islands: Who Lives There Now?
Ireland's offshore islands were dying for a century. Then the 2022 census showed the first real uptick. Here's what changed.
#5710: Tristan da Cunha: Life on the World's Most Remote Island
222 people, one village, and a dialect that conjugates like a single person — what life is actually like on the world's most remote inhabited island.
#5709: Life at 76°N: Inside Canada's Arctic Outposts
Grise Fiord scores 0.9839 on Canada's remoteness index. Toronto scores zero. What daily life looks like at the top of the world.
#5679: Glue, Don't Bolt: Anchoring Road Studs and Soil Anchors
Road studs get glued, not bolted — and plows eat anything proud of the pavement. Soil anchors are a different physics problem entirely.