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New colors without shooting lasers into your eyes

news.ycombinator.com Unknown 2025-07-18 22:01:17

1. Your eyes sense color. They do this because you have three different kinds of cone cells on your retinas, which are sensitive to different wavelengths of light. For whatever reason, evolution decided those wavelengths should be overlapping. For example, M cones are most sensitive to 535 nm light, while L cones are most sensitive to 560 nm light. But M cones are still stimulated quite a lot by 560 nm light—around 80% of maximum. This means you never (normally) get to experience having just o

Topics: color cones light red wavelengths

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Einstein Showed That Time Is Relative. But … Why Is It?

wired.com Rhett Allain 2025-07-24 07:00:00

So, you’re driving a car at half the speed of light. (Both hands on the wheel, please.) You turn on the headlights. How fast would you see this light traveling? What about a person standing by the road? Would they see the light beam moving at 1.5 times the speed of light? But that’s impossible, right? Nothing is faster than light. Yes, it seems tricky. The problem is, our ideas about the world are based on our experiences, and we don’t have much experience going that fast. I mean, the speed of

Topics: car light speed time traveling

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Stone blocks from the Lighthouse of Alexandria recovered from seafloor

news.ycombinator.com Dario Radley 2025-07-21 00:51:06

After centuries underwater, 22 huge stone blocks of the ancient Lighthouse of Alexandria, one of the Seven Wonders of the Ancient World, have been recovered from the Mediterranean seabed, a breakthrough in an ambitious digital reconstruction effort. Restoration is part of the ongoing “PHAROS” project, led by archaeologist and architect Isabelle Hairy of France’s National Center for Scientific Research (CNRS), along with Egypt’s Centre d’Études Alexandrines (CEAlex) under the authority of Egypt’

Topics: alexandria blocks century documentary lighthouse

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Will AI end cheap flights? Critics attack Delta’s “predatory” AI pricing.

arstechnica.com Unknown 2025-07-25 14:01:26

Delta has become the first airline to announce that it is using AI to boost profits by personalizing pricing through a pilot program that for months has caused customers to pay different prices for the same flights based on their data profile. Critics have warned that this use of AI goes beyond airline practices that charge people who book flights ahead less than people who book flights at the last minute—and could ultimately mean the end of cheap flights across the board if other airlines foll

Topics: based customers delta flights pricing

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ESA’s Moonlight programme: Pioneering the path for lunar exploration (2024)

news.ycombinator.com Unknown 2025-07-23 08:01:44

Applications ESA's Moonlight programme: Pioneering the path for lunar exploration 15/10/2024 10144 views 62 likes Imagine a near future where services such as satellite navigation, video conferencing, and file sharing are as seamless on the Moon as they are on Earth. That’s the vision of ESA’s Moonlight programme, which aims to establish Europe’s first-ever dedicated satellite constellation for telecommunication and navigation services for the Moon. With over 400 planned lunar missions by spac

Topics: esa lunar moonlight navigation programme

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ESA's Moonlight programme: Pioneering the path for lunar exploration

news.ycombinator.com Unknown 2025-07-23 18:01:44

Applications ESA's Moonlight programme: Pioneering the path for lunar exploration 15/10/2024 10144 views 62 likes Imagine a near future where services such as satellite navigation, video conferencing, and file sharing are as seamless on the Moon as they are on Earth. That’s the vision of ESA’s Moonlight programme, which aims to establish Europe’s first-ever dedicated satellite constellation for telecommunication and navigation services for the Moon. With over 400 planned lunar missions by spac

Topics: esa lunar moonlight navigation programme

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Want full lighting control? These panels let you customize each edge separately

androidauthority.com Unknown 2025-07-28 23:16:53

Edgar Cervantes / Android Authority Have you seen those cool-shaped lights adorning gamer and YouTuber walls? They are pretty cool, and if you’ve been looking to add a unique look to your own walls with something similar, the Linkind EP6 Smart Hexagon Panels might be just what you’re looking for. These will look amazing and add some really cool functionality you would otherwise only find in very expensive setups. Let’s tell you all about them! What are the Linkind EP6 Smart Hexagon Panels all

Topics: hexagon light linkind panels smart

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The Skylight Calendar is perfect for busy families, and easy enough for kids to use

zdnet.com Maria Diaz 2025-07-29 14:52:20

ZDNET's key takeaways The 15-inch Skylight Calendar is a smart display for $320, with a 10-inch version available for $160. It's a touchscreen calendar designed with busy lifestyles in mind that allows for shared use within a household or team. Though it's proven indispensable for my family, I wish the chores, not just the events, were visible in the calendar view, and the 15-inch version is expensive at $320. $319.99 at Amazon Getting organized is a never-ending battle for me. As a self-proc

Topics: calendar events like new skylight

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Finally, a battery floodlight camera that's perfect for my dark yard

zdnet.com Maria Diaz 2025-07-30 18:51:36

ZDNET's key takeaways The Blink Outdoor 4 Floodlight Camera is a practical, battery-powered solution for darker areas around your house that lack wiring and outlets. The AA batteries allow the floodlights to beam at 700 nits of brightness, which is not the most powerful on the market but good enough to see your surroundings. The Blink app is feature-rich, with plenty of camera settings to customize for the best surveillance, but you'll need a paid subscription to unlock the best features. View

Topics: blink camera floodlight outdoor plan

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Clashes between web and X11 colors in the CSS color scheme

news.ycombinator.com Unknown 2025-07-30 00:32:46

In computing, on the X Window System, X11 color names are represented in a simple text file, which maps certain strings to RGB color values. It was traditionally shipped with every X11 installation, hence the name, and is usually located in <X11root>/lib/X11/rgb.txt . The web colors list is descended from it but differs for certain color names.[1] Color names are not standardized by Xlib or the X11 protocol. The list does not show continuity either in selected color values or in color names, an

Topics: 100 50 dark green light

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Pebblebee tracker’s new SOS alert reminds us that updates can be good for gadgets

arstechnica.com Unknown 2025-07-31 17:54:39

Pebblebee is adding a free, helpful feature to already-purchased devices. Today, it announced that its Clip Universal Bluetooth trackers, which are compatible with iOS and Android devices, are being updated to include an Alert feature that sets off a siren and strobing light when a user wants help. Pebblebee started selling Android trackers in May 2024 in three different form factors: an AirTag-like Clip version, a credit card-shaped Card SKU, and the smallest version, Tag. In October 2024, Pe

Topics: alert clip devices light pebblebee

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Bluetooth tracker Pebblebee adds free SOS alarm to already-purchased devices

arstechnica.com Unknown 2025-07-31 22:54:39

Pebblebee is adding a free, helpful feature to already-purchased devices. Today, it announced that its Clip Universal Bluetooth trackers, which are compatible with iOS and Android devices, are being updated to include an Alert feature that sets off a siren and strobing light when a user wants help. Pebblebee started selling Android trackers in May 2024 in three different form factors: an AirTag-like Clip version, a credit card-shaped Card SKU, and the smallest version, Tag. In October 2024, Pe

Topics: alert clip devices light pebblebee

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This is the most customizable smart home accessory and it's on sale

zdnet.com Maria Diaz 2025-08-01 02:42:00

ZDNET's key takeaways The Govee Neon Rope Light 2 is available in white or black and in two lengths: 10 feet and 16.4 feet. More pliable than other neon light strips on the market, the Govee Neon Rope Light 2 is easy to install and comes with bend clips to facilitate getting closed angles. The light strip doesn't have a template guide for setup It's also too bright to use as a night light, even at 1% brightness, but that's a highly personal preference. View now at Amazon The Govee Neon Rope

Topics: govee light neon rope strip

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Lightning Detector Circuits

news.ycombinator.com Unknown 2025-08-01 18:07:31

Here's a version I built into a "fake" book I found at an art store. The copper PCB is connected to the circuit ground to act as a counterpoise for the antenna, increasing sensitivity. The lightning bolt was cut with a sharp knife then filled with blue-dyed epoxy. The antenna connects to the pin jack. I used a cheap flashlight head for the LED - I used too much blue dye in the epoxy so I need a bright flash! The image below is with an LED and no pot (but with the 150k resistor added). I made se

Topics: just lightning power resistor transistor

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Now Jack Dorsey has built an app to track your vitamin D

theverge.com Dominic Preston 2025-08-02 15:18:50

Sun Day is available now for iOS via TestFlight, and the code for the project is available on GitHub. The app uses location-based data to display your local UV index and sunlight hours. You can detail your skin type and clothing level, then manually toggle when you’re in and out of the sun and the app will track your rough vitamin D levels for the day, along with how long you can be in direct sunlight without burning.

Topics: app available day sun sunlight

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I tested an Android phone with a built-in smartwatch - my thoughts after a month

zdnet.com Jack Wallen 2025-08-02 08:00:14

ZDNET's key takeaways The Oukitel WP300 is available now on Amazon for $425 with a $70 off coupon. This modular smartphone has built-in smartwatch and earbud components, as well as a very bright LED light. Like all Oukitel phones I've tested, the WP300 is thick, bulky, and very heavy. View now at Amazon There are certain brands that have carved a niche for themselves, and Oukitel is one of them. The company creates phones and tablets that are rugged enough to withstand the rougher side of wor

Topics: light oukitel phone phones wp300

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Aliens Can Detect Earth’s Airports From 200 Light-Years Away

gizmodo.com Ellyn Lapointe 2025-08-02 10:00:53

Humans might not know of any intelligent beings beyond Earth, but if they exist, they might already know about us. New research shows that radar systems at commercial and military airports are inadvertently announcing our presence to any aliens with the ability to listen. Preliminary results from a study led by Ramiro Caisse Saide, an astrophysics PhD candidate at the University of Manchester, suggest extraterrestrials up to 200 light-years away could theoretically detect electromagnetic signal

Topics: away light radar signals years

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Scientists Say Earth May Be Trapped Inside a Huge, Strange Void

futurism.com Unknown 2025-08-02 02:45:03

Astronomers who examined the sound waves from the Big Bang say that the Earth — and the entire Milky Way galaxy we call home — could be trapped in a huge void billions of light years across. Their study, which was just presented at the Royal Astronomical Society's National Astronomy Meeting in the UK, could solve one of cosmology's greatest mysteries: the Hubble tension, or why the older universe appears to be expanding more slowly than younger regions. "The Hubble tension is largely a local p

Topics: banik light local universe void

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Your Wemo smart devices are about to get dumb as Belkin pulls the plug

zdnet.com Artie Beaty 2025-08-03 02:34:06

Smith Collection/Gado/Getty Images If you have any Wemo smart devices in your home, you should start planning an upgrade -- because you only have about six months left to use them. In an email to users today, Wemo announced that it was ending support for nearly all of its smart devices sold over the last 10 years on Jan. 31, 2026, including light switches, plugs, and more. Also: The $13 Amazon Smart Plug deal is the best Prime Day deal available right now "After careful consideration," the

Topics: light september smart switch wemo

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The Skylight Calendar is perfect for a busy family - especially with this deal

zdnet.com Maria Diaz 2025-08-03 10:17:58

ZDNET's key takeaways The 15-inch Skylight Calendar is a smart display for $320, with a 10-inch version available for $160. It's a touchscreen calendar designed with busy lifestyles in mind that allows for shared use within a household or team. Though it's proven indispensable for my family, I wish the chores, not just the events, were visible in the calendar view, and the 15-inch version is expensive at $320. $319.99 at Amazon The Skylight Calendar is a wall-mounted or tabletop digital calen

Topics: calendar events like new skylight

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Feature Request: Three advanced features I’d like to see added to HomeKit

9to5mac.com Ben Lovejoy 2025-08-03 14:15:00

HomeKit dramatically improved the user-friendliness of both configuring and controlling smart homes, by allowing everything to be done though a single app. But while the Home app was a fantastic breakthrough for its time, technology has moved on, and I think Apple needs to respond. Here are three advanced features I’d like to see in the AI age … Natural-language programming Even with HomeKit, setting up scenes and automations is still a relatively techy activity. You need to have the kind of

Topics: app home lights living room

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Bill Atkinson's psychedelic user interface

news.ycombinator.com Axle Davids 2025-08-03 09:03:59

Steve Jobs and Bill Atkinson with the first Apple Macintosh – 1984 The Double Life of Bill Atkinson Bill Atkinson, the visionary Apple engineer behind much of the original Macintosh, passed away on June 5, 2025, at age 74, from pancreatic cancer—the same illness that claimed his friend Steve Jobs. Obituaries across the tech world honoured his pioneering role in personal computing. At Apple, he developed QuickDraw, the graphics engine behind the Mac’s interface; invented MacPaint, the first wid

Topics: dmt jaguar lightwand meo psychedelic

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Eufy’s Floodlight Security Camera Is Cheaper Than Ever This Prime Day (2025)

wired.com Simon Hill 2025-08-04 06:19:32

There are tons of great home security deals this Prime Day, but my favorite floodlight security camera shines brightest. At 35% off, the Eufy E340 Floodlight Camera is $142 ($78 off) and is worth a look. It combines a clever dual-lens camera design with two bright light panels capable of illuminating your backyard or driveway. It can also track suspicious characters and record locally, so there’s no need for a subscription. It occasionally drops in price, but it is cheaper than I’ve ever seen b

Topics: camera day eufy floodlight lens

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Bill Atkinson's Psychedelic User Interface

news.ycombinator.com Axle Davids 2025-08-04 15:03:59

Steve Jobs and Bill Atkinson with the first Apple Macintosh – 1984 The Double Life of Bill Atkinson Bill Atkinson, the visionary Apple engineer behind much of the original Macintosh, passed away on June 5, 2025, at age 74, from pancreatic cancer—the same illness that claimed his friend Steve Jobs. Obituaries across the tech world honoured his pioneering role in personal computing. At Apple, he developed QuickDraw, the graphics engine behind the Mac’s interface; invented MacPaint, the first wid

Topics: dmt jaguar lightwand meo psychedelic

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Final report on Alaska Airlines Flight 1282 in-flight exit door plug separation

news.ycombinator.com Unknown 2025-08-05 01:51:45

What Happened On January 5, 2024, a Boeing 737-9 airplane operated by Alaska Airlines as flight 1282 experienced an in-flight separation of the left mid exit door (MED) plug and rapid depressurization when climbing through about 14,830 ft after takeoff from Portland International Airport (PDX), Portland, Oregon. One flight attendant and 7 passengers received minor injuries; the captain, the first officer, 3 flight attendants, and 164 passengers were uninjured; and the airplane sustained subst

Topics: airplane flight left med plug

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Belkin ending support for most of its Wemo smart home accessories

9to5mac.com Chance Miller 2025-08-05 14:51:46

Belkin has announced that it is ending support for most of its Wemo smart home products. Customers will lose access to the Wemo app, any features that rely on cloud connectivity, customer support, and more. It’s effectively the end of the Wemo smart home brand. Belkin shared the news in an email to customers and on its website today. Effective January 31, 2026, Belkin says that a wide array of older Wemo products will lose support for key features: App Access : The Wemo app used to control the

Topics: belkin light smart switch wemo

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This tool strips away anti-AI protections from digital art

technologyreview.com Peter Hall 2025-08-06 21:00:00

To be clear, the researchers behind LightShed aren’t trying to steal artists’ work. They just don’t want people to get a false sense of security. “You will not be sure if companies have methods to delete these poisons but will never tell you,” says Hanna Foerster, a PhD student at the University of Cambridge and the lead author of a paper on the work. And if they do, it may be too late to fix the problem. AI models work, in part, by implicitly creating boundaries between what they perceive as d

Topics: ai art glaze lightshed nightshade

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Finally, a battery floodlight camera that's perfect for my dark yard (and it's 54% off)

zdnet.com Maria Diaz 2025-08-06 22:00:35

ZDNET's key takeaways The Blink Outdoor 4 Floodlight Camera is a practical, battery-powered solution for darker areas around your house that lack wiring and outlets. The AA batteries allow the floodlights to beam at 700 nits of brightness, which is not the most powerful on the market but good enough to see your surroundings. The Blink app is feature-rich, with plenty of camera settings to customize for the best surveillance, but you'll need a paid subscription to unlock the best features. View

Topics: blink camera floodlight outdoor plan

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This is the most customizable smart home accessory and it's on sale for Prime Day

zdnet.com Maria Diaz 2025-08-07 02:39:00

ZDNET's key takeaways The Govee Neon Rope Light 2 is available in white or black and in two lengths: 10 feet and 16.4 feet. More pliable than other neon light strips on the market, the Govee Neon Rope Light 2 is easy to install and comes with bend clips to facilitate getting closed angles. The light strip doesn't have a template guide for setup It's also too bright to use as a night light, even at 1% brightness, but that's a highly personal preference. View now at Amazon The Govee Neon Rope

Topics: govee light neon rope strip

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The most otherworldly, mysterious forms of lightning on Earth

news.ycombinator.com Unknown 2025-08-04 06:49:31

Our atmosphere is like one big electrical circuit: Thunderstorms are the batteries that charge it up, and lightning is the current flowing through it. On the ground we see evidence of this circuit when lightning cracks and strikes the ground, or when it lights up deep inside a thundercloud, but high above the clouds lies a secret electrical zoo full of sprites, elves, and jets. These fantastical terms refer to light displays called transient luminous events or TLEs that occur in Earth’s upper a

Topics: atmosphere electrical lightning thunderstorms tles

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Latest Tech News

New colors without shooting lasers into your eyes

Einstein Showed That Time Is Relative. But … Why Is It?

Stone blocks from the Lighthouse of Alexandria recovered from seafloor

Will AI end cheap flights? Critics attack Delta’s “predatory” AI pricing.

ESA’s Moonlight programme: Pioneering the path for lunar exploration (2024)

ESA's Moonlight programme: Pioneering the path for lunar exploration

Want full lighting control? These panels let you customize each edge separately

The Skylight Calendar is perfect for busy families, and easy enough for kids to use

Finally, a battery floodlight camera that's perfect for my dark yard

Clashes between web and X11 colors in the CSS color scheme

Pebblebee tracker’s new SOS alert reminds us that updates can be good for gadgets

Bluetooth tracker Pebblebee adds free SOS alarm to already-purchased devices

This is the most customizable smart home accessory and it's on sale

Lightning Detector Circuits

Now Jack Dorsey has built an app to track your vitamin D

I tested an Android phone with a built-in smartwatch - my thoughts after a month

Aliens Can Detect Earth’s Airports From 200 Light-Years Away

Scientists Say Earth May Be Trapped Inside a Huge, Strange Void

Your Wemo smart devices are about to get dumb as Belkin pulls the plug

The Skylight Calendar is perfect for a busy family - especially with this deal

Feature Request: Three advanced features I’d like to see added to HomeKit

Bill Atkinson's psychedelic user interface

Eufy’s Floodlight Security Camera Is Cheaper Than Ever This Prime Day (2025)

Bill Atkinson's Psychedelic User Interface

Final report on Alaska Airlines Flight 1282 in-flight exit door plug separation

Belkin ending support for most of its Wemo smart home accessories

This tool strips away anti-AI protections from digital art

Finally, a battery floodlight camera that's perfect for my dark yard (and it's 54% off)

This is the most customizable smart home accessory and it's on sale for Prime Day

The most otherworldly, mysterious forms of lightning on Earth

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