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How One Builder 3D Printed a Complete Algae Production System

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3D-Printed Photobioreactor Algae Production
One builder showcases custom-built photobioreactor from start to finish, having printed the majority of its components on a conventional 3D printer sitting on a work surface. The final machine simply sits there silently day after day, converting water and light into useable biomass without the need for anyone to pay attention to it.



Spirulina fills the main chamber since the design ensures a consistent temperature, light, and air supply around the clock. A small initial amount of culture, roughly a gallon, expands over the next few weeks when fresh water and nutrients are introduced. The light enters from the sides, and there’s an air bubbler to keep everything mixed up and full of oxygen. Sensors are on the job, keeping an eye on things to ensure that the algae has enough to grow and reproduce swiftly, providing a few grams of dried biomass per week after the culture is fully established.


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Things begin with the Bambu Lab A1 printer laying down thermoplastic layers for the frame, tank supports, and custom fittings. Large pieces come together quickly due to automated calibration and the printer’s rapid speeds. The printed parts fit together nicely and snugly, requiring little more than a touch of tidying before assembling the entire device. Off-the-shelf pumps, lighting, and tubing are then inserted into the plastic skeleton, changing it into a sealed environment that retains the liquid inside without leaking everywhere.

3D-Printed Photobioreactor Algae Production
When everything is more or less upright, the electronics take over. A Raspberry Pi 5 serves as the main controller, with two Arduinos acting as task specialists. One Arduino is responsible for running the lights, heating, and bubbler on a regular basis. The second only handles the automated sampling procedure, which checks the acidity levels without allowing the sensors to run dry or deviate off course. A series of USB wires transmit basic text commands back and forth to keep the entire arrangement in sync.

3D-Printed Photobioreactor Algae Production
Measuring pH is particularly difficult since the probe must remain wet and clean between readings. So there’s a small rotating part that removes the lids off the storage vials, rinses the sensor in deionized water, and then moves it to grab a sample from the culture before returning it to the vial. A spinning pill inside a silicone tube attached to magnets to provide gentle stirring and minimize residue buildup. As a bonus, the same motion shuts up the vial, preventing evaporation. This all runs on its own tiny schedule and logs each outcome in case somebody wants to look it up later.

3D-Printed Photobioreactor Algae Production
Data appears on a touchscreen that looks like a control panel. At a glance, graphs indicate how light intensity decreases at the bottom of the tank as algae density increases and blocks more light. The temperature readings are always displayed directly in front of you. When harvest time approaches, when the light curve finally flattens out, signaling peak concentration, the system drains a section of the culture, filtering out the good stuff while allowing the remainder to continue growing. Once harvested, the material is spread out on trays, dries in a few hours, and is pulverized into a fine green powder that can be stored or used immediately as fish food.

3D-Printed Photobioreactor Algae Production
The biomass yield is currently around eight grams per week, which is sufficient to support a small aquaponic setup and reduce the need to purchase as much feed. Dried spirulina can also be stored for up to two years, providing a shelf-stable protein source right from your own backyard. And when your algae feed your fish, your fish waste fertilizes your plants, and your plant trimmings return to the algal culture, the entire system just keeps cycling round and round without any external assistance. Once the first culture is established, there is no need for additional inputs.

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Cosmic Orange is out, Dark Cherry rumored to be new hot iPhone 18 Pro color

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A new report claims to have details of the colors for the forthcoming iPhone 18 Pro, including that the signature one will be Dark Cherry.

Close-up of a purple smartphone's back, showing three camera lenses, a flash, and sensor dots on a smooth, metallic surface with softly blurred background.
Mockup of a Dark Cherry iPhone – original image credit: Wesley Hilliard, recoloring by William Gallagher

Apple did already go some way to getting rid of the horrible Cosmic Orange color, by making some iPhones turn pink instead. But reportedly, it’s now discarding the color entirely, in favor of a more appealing Dark Cherry.
Macworld claims to have a source that has provided the complete list of colors for the new iPhone 18 Pro and iPhone 18 Pro Max. That list is not very much different to previous rumors, especially concerning reports of Apple considering various shades of red.
Rumor Score: 🤔 Possible
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A lot of you panic-bought PCs to avoid RAMaggedon 2026

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The specter of price hikes caused by the current AI-driven demand for memory and storage appears to have convinced a fair share of people to buy a new computer. According to data analyzed by Counterpoint Research, global PC shipments grew around 3.2 percent year-over-year in Q1 2026, “driven by pre-emptive buying before memory-led price increases hit the retail level” and Microsoft forcing some customers to upgrade by ending support for Windows 10 last year.

Sales hit 63.3 million units during the first quarter, Counterpoint says, and were particularly concentrated in five high-end PC makers: Lenovo, ASUS, Apple, HP and Dell. Of the five, Lenovo commands the most PC market share at 26 percent, but sales increased for almost all of the companies, save for HP, whose year-over-year sales technically declined by 5 percent. Of particular note, Apple’s PC sales grew by 11 percent, likely on the strength of the M5 updates it made to the MacBook Pro and MacBook Air, and the introduction of the affordable $600 MacBook Neo. Counterpoint suggests the updates could drive even further sales growth next quarter.

Even with positive sales, the PC industry as a whole is by no means out of the woods. “The aggressive expansion in AI infrastructure investment is driving up overall component costs, which will likely impact the pricing of CPUs and other key components in [PCs],” Counterpoint Senior Analyst Minsoo Kang says. “Ultimately, the sustained upward pressure on costs and the resulting hike in retail prices are expected to have a significant negative impact on the PC market’s growth in 2026.”

A general sense that the worst is yet to come is consistent with what other analysts have warned about the current shortages of RAM and storage. In December 2025, IDC predicted that PC shipments could drop as much as 8.9 percent in 2026 in response to the price of RAM, and later revised its prediction to 11.6 percent this past March. Even if consumers aren’t feeling the worst of these price hikes just yet, new announcements of price increases seem to arrive like clockwork every few weeks — for example, this week, Meta raised the price of its Quest headsets — which means if they aren’t feeling them now, they will soon.

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Critical Atlantic Current Significantly More Likely To Collapse Than Thought

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An anonymous reader quotes a report from the Guardian: The critical Atlantic current system appears significantly more likely to collapse than previously thought after new research found that climate models predicting the biggest slowdown are the most realistic. Scientists called the new finding “very concerning” as a collapse would have catastrophic consequences for Europe, Africa and the Americas. The Atlantic meridional overturning circulation (Amoc) is a major part of the global climate system and was already known to be at its weakest for 1,600 years as a result of the climate crisis. Scientists spotted warning signs of a tipping point in 2021 and know that the Amoc has collapsed in the Earth’s past.

Climate scientists use dozens of different computer models to assess the future climate. However, for the complex Amoc system, these produce widely varying results, ranging from some that indicate no further slowdown by 2100 to those suggesting a huge deceleration of about 65%, even when carbon emissions from fossil fuel burning are gradually cut to net zero. The research combined real-world ocean observations with the models to determine the most reliable, and this hugely reduced the spread of uncertainty. They found an estimated slowdown of 42% to 58% in 2100, a level almost certain to end in collapse.

The Amoc is a major part of the global climate system and brings sun-warmed tropical water to Europe and the Arctic, where it cools and sinks to form a deep return current. A collapse would shift the tropical rainfall belt on which many millions of people rely to grow their food, plunge western Europe into extreme cold winters and summer droughts, and add 50-100cm to already rising sea levels around the Atlantic. The slowdown has to do with the Arctic’s rapidly rising temperatures from global warming. “Warmer water is less dense and therefore sinks into the depths more slowly,” explains the Guardian. “This slowing allows more rainfall to accumulate in the salty surface waters, also making it less dense, and further slowing the sinking and forming an Amoc feedback loop.”

The new research has been published in the journal Science Advances.

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China just tracked a massive tanker from space, and the implications for US naval stealth are suddenly far more serious

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  • China successfully demonstrates geosynchronous satellite tracking of moving maritime targets
  • Persistent surveillance from orbit reduces reliance on low Earth satellite constellations
  • Three satellites could provide continuous global monitoring of high-value naval assets

China has released radar images showing a geosynchronous orbit satellite successfully tracking a moving maritime target for the first time.

The satellite locked onto the Towa Maru, a 340 meter Japanese tanker traversing rough seas near the Spratly Islands, from an altitude of 35,800 kilometers above Earth.

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15 years after ‘Video Games,’ Lana Del Rey has an actual video game song

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The James Bond franchise has a long history of getting pop stars to record its theme songs (perhaps most memorably with Live and Let Die), and it looks like that tradition will now extend to video game adaptations about the fictional spy. IO Interactive has announced that Lana Del Rey co-wrote and performed the theme for 007 First Light, the developer’s playable James Bond origin story.

“First Light” is written and performed by Lana Del Rey and composer David Arnold, and like the moody and abstract opening credits released alongside the song, could vaguely gesture at the themes of the game. IO Interactive has previously said that its game focuses on a young, inexperienced and more reckless Bond, before he developed his trademark cool. The developer is also integrating the stealth mechanics it perfected in Hitman into the upcoming game.

Del Rey’s personal gaming experience may begin and end with her hit “Video Games,” which was apparently written about a former boyfriend’s love of World of Warcraft, but the artist does know how to write a song with Bond in mind. Lana Del Rey shared in 2024 that her song “24” from the album Honeymoon was originally written for 2017’s Spectre, one of several songs that were cast aside in favor of Sam Smith’s “Writing’s on the Wall.”

007 First Light is coming to Xbox Series X/S, PlayStation 5 and PC on May 27, 2026. A Nintendo Switch 2 version of the game is now coming out this summer.

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Apple at 50: Gil Amelio, the CEO who brought back Steve Jobs

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Gil Amelio had the shortest reign of all Apple CEOs, but maybe the greatest impact as, practically despite himself, he set the stage for how the company would survive.

Two middle-aged men stand close, facing each other seriously against a dark background, both in formal clothing, appearing to be in an intense or thoughtful conversation
Steve Jobs (left) and Gil Amelio (right), failing to see eye to eye – image credit: Apple

Gil Amelio is yet another Apple CEO who has never had the profile of Tim Cook, Steve Jobs, or John Sculley. If he’s remembered for his time running Apple, it is because he had the firm acquire NeXT and so was responsible for Steve Jobs returning to Apple.
Long time AppleInsider readers may also remember that Jobs successfully worked to oust Amelio from the role. But what’s not even that well known is that Jobs may even have been taking revenge.
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What was the first OS you ever used?

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Before clean installs, dual-boot menus, and cloud everything, there was that first encounter, the moment you realized a computer wasn’t just hardware, it was a system with a personality.
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3 underrated Apple TV shows you should watch this weekend (April 17-19)

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Apple TV+ has quietly built one of the more interesting libraries among the popular streaming platforms. Somewhere between the buzzy dramas and the shows that everyone seems to be talking about, there are a handful of genuinely great series just sitting there, unwatched.

So let’s fix that this weekend. Whether you are in the mood for a thriller that messes with your grip on reality or something that will haunt you using nothing but sound, there is something here for you. Here are three underrated Apple TV+ shows worth your time.

We also have guides to the best new movies to stream, the best movies on Netflix, the best movies on Hulu, the best free movies, and the best movies on Amazon Prime Video.

Counterpart (2017)

Howard Silk has spent 30 years doing a quiet, unremarkable job at a Berlin-based UN agency, shuffling papers and exchanging coded messages he does not understand. One day, he is told the truth: there is a crossing beneath the building to a parallel Earth, one that split from ours in 1987 and has since gone in a very different direction. To make things worse, his counterpart from that other world, also called Howard Silk, is nothing like him. Same face, same history, but entirely different man.

J.K. Simmons plays both versions with such complete distinction that you never lose track of which Howard you are watching. It is one of the best dual performances I have seen in recent TV shows. The show wraps its parallel world concept in the thick atmosphere of Cold War espionage: Berlin backstreets, dead drops, sleeper agents, and the paranoia of never knowing whose side anyone is really on.

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You can watch Counterpart on Apple TV.

Calls (2021)

There are no visuals here in this underrated Apple TV show. What you get instead is a series of phone calls between strangers, laid over abstract, shifting patterns of light and sound, as something catastrophic and inexplicable begins to unravel the world around them. Each of the nine short episodes drops you into a different conversation, most of them terrifying in the quietest possible way.

The cast is stacked: Pedro Pascal, Aubrey Plaza, Lily Collins, Rosario Dawson, and others, none of whom you ever see. You just hear them, and that turns out to be the point. Directed by Fede Álvarez, the filmmaker behind Don’t Breathe, the show understands that what your imagination fills in is always scarier than what any screen can show you.

You can watch Calls on Apple TV.

Shining Girls (2022)

Kirby Mazrachi is a newspaper archivist at the Chicago Sun-Times trying to hold her life together after surviving a brutal assault. The problem is that her reality keeps changing around her. She comes home and suddenly owns a dog instead of a cat. She discovers she is married to a man she only remembers as a colleague. Her desk at work keeps moving. No one else notices except for Kirby.

Elisabeth Moss carries the whole thing on her back, and she is extraordinary, calibrating Kirby’s confidence and anxiety differently across each shifting version of reality. Jamie Bell is quietly terrifying as the villain. The show uses time travel not as a gimmick but as a way of showing how one person’s violence can create ripples, trapping its victims in a reality they cannot fully trust. It is slow to start and deliberately disorienting, which is entirely the point.

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This is our first look at Microsoft’s next Surface Pro and Laptop

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Microsoft’s next wave of Surface devices may have just leaked, and it looks like it is doubling down on choice.

Early retailer listings suggest the upcoming Surface Pro and Surface Laptop will once again be split between ARM and Intel models. There will also be more configurations than before.

On the consumer side, both devices are expected to run on Qualcomm’s Snapdragon X2 chips. These include the X2 Plus and X2 Elite. For the Surface Laptop, that reportedly means sticking with the 13.8-inch model. It also involves dropping the larger 15-inch ARM variant altogether. Memory options are said to range from 16GB to 24GB RAM. These will be paired with 512GB to 1TB SSD storage.

The next Surface Pro follows a similar approach, with ARM-powered models offering 16GB to 32GB RAM and up to 512GB of storage. You also get the usual Platinum and Black colour options. There is nothing wildly different on the surface. However, the real changes seem to sit with the business-focused models.

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That’s where Intel comes back into play. Leaked details point to Intel Core Ultra 5 and Ultra 7 “Panther Lake” chips powering enterprise versions of both devices. These will have significantly higher ceilings, up to 64GB of RAM, depending on configuration.

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Display options also get a boost. The Surface Pro for business is tipped to offer a choice between LCD and OLED panels, alongside an optional 5G modem. In addition, the Surface Laptop variants are expected to follow suit. Both 13.8-inch and 15-inch OLED options are available for those going the Intel route.

If accurate, the split strategy mirrors what Microsoft has been doing recently. ARM is for efficiency and battery life on consumer devices. Meanwhile, Intel provides flexibility and power in business setups.

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There’s still no confirmed launch date or pricing. However, expectations are that costs could climb even higher following Microsoft’s recent Surface price increases. For now, this leak gives a fairly clear early picture – more options, more power, and potentially a more complicated buying decision, depending on which chip camp you land in.

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AI Trusted Less Than Social Media and Airlines, With Grok Placing Last, Survey Says

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Google Gemini is the most trusted AI platform among its competition, but many people still have concerns about the technology, according to an American Customer Satisfaction Index poll released Thursday.

In ACSI’s results, AI scored an overall customer satisfaction score of 73 on a scale of 0 to 100, which the authors noted was slightly below social media (74), airlines and mortgage lenders, but in line with energy utilities. 

Of the five platforms mentioned in the survey, Google Gemini led with 76, followed by Microsoft Copilot (74), Claude and ChatGPT (both 73), and Grok and Perplexity (both 71). Meanwhile, TikTok (77) and YouTube (78) both scored better than the AI platforms.

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Gemini is one of the most prolific AI services, with access via smart speakers, TVs, phones and computers, while most ChatGPT users access the AI tool via the ChatGPT website or mobile app, and Grok via social media platform X.

The ACSI poll found that 43% of respondents said reduced human-to-human interaction is their main concern, followed by job loss for future generations (37%) and their own job risk (31%), based on interviews with 2,711 US adults.

Baby Boomers were the most skeptical generation in the poll, with 35% saying they are very concerned about AI’s effects, compared to just 6% who view it extremely favorably.

Disconnect between AI adoption and perception

While platforms such as ChatGPT have up to 1 billion weekly users, there is still a disconnect between AI’s adoption and public perception of it, which is driven by concerns over privacy, the spread of misinformation and the loss of jobs. 

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“Consumers spent the last decade learning to distrust how social media platforms handle their data, and AI’s privacy scores suggest they’re carrying that skepticism forward,” said Forrest Morgeson, associate professor of marketing at Michigan State University and director of research emeritus at the ACSI.

21% reported an “extremely favorable” outlook toward AI, while an equal 21% said they are “very concerned about the consequences.” 

These results were in line with another poll published by YouGov this week, which found that only 29% think the positive effects of AI outweigh the negative ones, while 36% think its net effects are negative.

It’s worth noting that more than half of the people interviewed (56%) had no recent experience with AI, but of the 44% who did, half of them use AI at least once a day, and the usage went up with people who earned over $100,000 a year.

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Last month, an NBC poll suggested that AI was one of the least-liked things in America, but it was still more popular than the Democratic Party.

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