Show HN: I made a calculator that works over disjoint sets of intervals
https://victorpoughon.github.io/interval-calculator/
https://victorpoughon.github.io/interval-calculator/
Category Theory Illustrated – Orders
https://abuseofnotation.github.io/category-theory-illustrated/04_order/
https://abuseofnotation.github.io/category-theory-illustrated/04_order/
Flock Condemns False Child Predator Allegations, Yet Calls Critics Terrorists
https://ipvm.com/reports/flock-allegations-critics
https://ipvm.com/reports/flock-allegations-critics
IPVM
Flock Condemns False Child Predator Allegations, Yet Calls Its Own Critics Terrorists (Public Report)
See how the fight over Flock has escalated, and how Flock's objections contrast with their own behavior.
Migrating from DigitalOcean to Hetzner: From $1,432 to $233 With Zero Downtime
https://isayeter.com/posts/digitalocean-to-hetzner-migration/
https://isayeter.com/posts/digitalocean-to-hetzner-migration/
Isa Yeter
Migrating from DigitalOcean to Hetzner: From $1,432 to $233/month With Zero Downtime
A real-world production migration from DigitalOcean to Hetzner dedicated, handling 248 GB of MySQL data across 30 databases, 34 Nginx sites, GitLab EE, Neo4j, and live mobile app traffic — with zero downtime.
Sherry Turkle: "We're losing the raw, human part of being with each other"
https://www.theguardian.com/science/2013/may/05/rational-heroes-sherry-turkle-mit
https://www.theguardian.com/science/2013/may/05/rational-heroes-sherry-turkle-mit
the Guardian
Sherry Turkle: 'We're losing the raw, human part of being with each other'
Catherine de Lange meets the one-time 'cyber-diva' who some now call a 'technophobe'
Amazon won't release Fire Sticks that support sideloading anymore
https://arstechnica.com/gadgets/2026/04/amazon-wont-release-fire-sticks-that-support-sideloading-anymore/
https://arstechnica.com/gadgets/2026/04/amazon-wont-release-fire-sticks-that-support-sideloading-anymore/
Ars Technica
Amazon won’t release Fire Sticks that support sideloading anymore
The two newest Fire Sticks block apps from outside of Amazon's store.
The USDA's gardening zones have shifted. (Interactive app and map)
https://apps.npr.org/plant-hardiness-garden-map/
https://apps.npr.org/plant-hardiness-garden-map/
NPR
The USDA’s gardening zones shifted. This map shows you what’s changed in vivid detail
There's a good chance your zone shifted when the USDA updated its plant hardiness map in 2023. Zoom in on what that means for your garden.
UpCodes (YC S17) Is Hiring SDRs to Help Make Construction More Productive
https://up.codes/careers?utm_source=HN
https://up.codes/careers?utm_source=HN
UpCodes
UpCodes | Careers
We’re looking for talented and motivated people who can help us build easy-to-use compliance and product research tools. Learn about our culture and explore open positions.
Traders placed over $1B in perfectly timed bets on the Iran war
https://www.theguardian.com/world/2026/apr/18/iran-war-bets-ethics-concerns
https://www.theguardian.com/world/2026/apr/18/iran-war-bets-ethics-concerns
the Guardian
Traders placed over $1bn in perfectly timed bets on the Iran war. What is going on?
Suspicious wagers on the US-Israel war in Iran are creating huge windfalls and raising concerns among lawmakers
Young sons of legendary U.S. marshal ride horseback from Oklahoma to New York
https://texascooppower.com/the-astonishing-ride-of-the-abernathy-boys/
https://texascooppower.com/the-astonishing-ride-of-the-abernathy-boys/
Texas Co-op Power
The Astonishing Ride of the Abernathy Boys
Young sons of legendary U.S. marshal Jack Abernathy ride horseback from Oklahoma to New York in 1910
PostgreSQL production incident caused by transaction ID wraparound
https://www.sqlservercentral.com/articles/i-too-have-a-production-story-a-downtime-caused-by-postgres-transaction-id-wraparound-problem
https://www.sqlservercentral.com/articles/i-too-have-a-production-story-a-downtime-caused-by-postgres-transaction-id-wraparound-problem
SQLServerCentral
Downtime Caused by the Postgres Transaction ID Wraparound Problem
Learn about transaction ID wraparound in PostgreSQL, which caused a problem for the author.
Any Color You Like: NIST Scientists Create 'Any Wavelength' Lasers
https://www.nist.gov/news-events/news/2026/04/any-color-you-nist-scientists-create-any-wavelength-lasers-tiny-circuits
https://www.nist.gov/news-events/news/2026/04/any-color-you-nist-scientists-create-any-wavelength-lasers-tiny-circuits
NIST
Any Color You Like: NIST Scientists Create ‘Any Wavelength’ Lasers in Tiny Circuits for Light
NIST scientists and collaborators have pioneered a way to make integrated circuits for light by depositing complex patterns of specialized materials onto silicon wafers.