See the Moon phase expected for April 21, 2026 as well as when the next Full Moon is expected.
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Tips and Solutions for Hurdle on April 21, 2026
Hints and answers to today’s Hurdle all in one place.
Dyson’s Back with a Travel-Size Supersonic Hairdryer
Ten years ago, Dyson kicked off the hair gadget arms race with its $400 Supersonic hairdryer. Today, it’s back with a slightly smaller and cheaper travel-size version. As the name suggests, the $299.99 Supersonic Travel is meant for people on the go – whether that’s a business trip or a jaunt to the gym before […]
Build Your Own Sendspin Audio Receiver for Multi-Room Sync and Home Assistant Integration

SendspinZero is an open-source, DIY Sendspin audio receiver for your amplifier that relies on off-the-shelf parts costing around $10 and a 3D printed enclosure. It integrates with Home Assistant for multi-room audio synchronization. It sounds good, but what is Sendspin exactly? It’s a royalty-free, open protocol developed by the Open Home Foundation for synchronized audio playback across multiple devices and rooms. Besides audio, it also supports screens for album art and control music, and sound-activated lights (coming soon feature). The protocol enables open-source products that compete against proprietary systems like Sonos, AirPlay, or Google Cast, and integrates nicely with the Music Assistant add-on for Home Assistant. Sendspin audio receiver key components: Waveshare ESP32-S3-Zero board with 2MB PSRAM (About $4-$6 on AliExpress, $12 on Amazon), ideally the version without pre-soldered headers Optional 1.54-inch LCD screen (About $5 on AliExpress) Optional 3-6V, 22mm bi-color button (About $2 to $3) Audio output options: […]
The post DIY Sendspin audio receiver supports multi-room audio synchronization, integrates with Home Assistant appeared first on CNX Software – Embedded Systems News.
Grasping the Distinctions Between IPS and VA Monitors
**What’s The Difference Between IPS And VA Monitors?**
When searching for a new display, you will come across different types, each with distinct features. While OLED screens are rising in popularity, LCD monitors utilizing VA (Vertical Alignment) or IPS (In-Plane Switching) technology still provide notable benefits based on your requirements.
**VA Monitors:**
VA panels are recognized for their excellent contrast levels and rich blacks, making them perfect for enjoying movies, shows, and games where visual intricacy is important. Nevertheless, they require a central viewing position to ensure sharpness and true-to-life colors.
**IPS Monitors:**
IPS screens deliver exceptional color precision, making them ideal for photography and video production. They maintain consistent picture quality from wide angles and manage fast-moving images more effectively, which is advantageous for competitive gaming.
**Considerations:**
The choice between VA and IPS relies on individual tastes and particular use cases. VA monitors shine in delivering a cinema-like experience with improved contrast, while IPS monitors present smoother visuals and color fidelity, particularly for artistic endeavors.
**Price and Availability:**
Cost is another aspect to take into account. VA technology is more commonly utilized, resulting in a wider selection of budget-friendly options, especially for larger displays. IPS monitors, traditionally linked to high-end quality, are now more readily available but generally remain pricier due to their superior color representation.
In the end, the decision between VA and IPS monitors is influenced by your user profile and specific requirements, whether you favor contrast and immersive experiences or color accuracy and wider viewing angles.
NASA’s Creative Fighter Jet Initiative May Lower Aviation Expenses
While NASA’s main emphasis has been on the unique Artemis II mission, it has been evaluating a novel wing technology that could save airlines a significant amount of money by cutting fuel consumption by up to 10%. This operates by preserving smooth airflow, referred to as laminar flow. Testing commenced on the ground and has now taken to the skies – but not on a commercial plane. The NASA team attached a three-foot scale model of a tailored wing beneath an F-15B to assess their Crossflow Attenuated Natural Laminar Flow (CATNLF) design.
In early January 2026, the test jet maneuvered around Armstrong Flight Research Center in Edwards, California, reaching speeds of 144 mph. Due to the vertical mounting of the test wing, there was no need to construct an expensive custom aircraft. By late January 2026, the jet ascended for a 75-minute flight that attained an altitude of 34,000 feet.
The objective is to sustain laminar airflow and minimize drag on commercial flights. Drag increases when airflow abruptly shifts, leading to friction that consumes fuel. Most commercial airplanes have large, swept wings that disrupt laminar flow. NASA states that researchers have been striving for decades to enhance airflow on swept wings, which is part of the agency’s initiatives to boost the performance of aircraft wings.
How this NASA initiative could save airlines millions
Fuel constitutes the airline industry’s largest operational expense, and NASA asserts that a 10% reduction in fuel consumption achieved with the CATNLF wing design would yield millions in savings for airlines. A typical Boeing 777 flight transporting 365 passengers from New York to London consumes 14,500 gallons of fuel, thus the design would conserve approximately 1,450 gallons per flight. Based on the summer 2025 price of $2.25 per gallon for jet fuel, that translates to roughly $3,200 in savings. Considering current rates, which exceeded $5.50 a gallon in Europe in April 2026, the savings would be significantly higher.
Over the span of an average year, an aircraft making daily flights from New York to London could save $1.2 million or up to $2.6 million at the current higher fuel prices. With more than 1,300 Boeing 777s in operation worldwide, potential savings could amount to hundreds of millions of dollars. Airlines could either pass these savings on to customers or reinvest in their fleets, as air travel demand may double over the next 25 years.
The design remains in its preliminary phases, so it won’t be featured on any airline flights immediately. NASA anticipates up to 15 test flights to determine how the CATNLF design performs under various speeds, altitudes, and conditions. NASA is hopeful that, if successful, the design could eventually be incorporated into the next generation of commercial aircraft or even supersonic planes, which are making a comeback in commercial aviation in 2026.
DOJ Replies to Apple’s Appeal for Samsung Records in Antitrust Case
**DOJ Critiques Apple’s Evidence Request from Samsung in Antitrust Case**
The U.S. Department of Justice (DOJ) has recently filed a response that critiques Apple’s demand for evidence from Samsung Electronics based in South Korea, as part of the ongoing antitrust litigation against Apple. This article explores the context of the case, Apple’s plea, and the DOJ’s objections.
### Some Context
Apple’s legal strategy commenced when it sought documents from Samsung Electronics, claiming that these materials are crucial for its defense in the antitrust case. The allegations focus on claims that Apple has participated in monopolistic behaviors in the smartphone and smartwatch sectors.
The impetus for Apple’s inquiry originated from Samsung’s U.S. subsidiary, which refused to supply the records Apple regarded as necessary to illustrate market competitiveness, the rate of user platform switching, and the potential anticompetitive repercussions of Apple’s strategies. Samsung U.S. indicated that the pertinent documents are solely maintained by its parent company in South Korea, leading Apple to request the United States District Court for the District of New Jersey to file a formal request for these records under the Hague Evidence Convention.
This convention aids in obtaining evidence from foreign parties in civil or commercial disputes, yet even if the U.S. court approves Apple’s request, South Korean officials must determine whether to comply. Additionally, Samsung might invoke Korean law to contest the release of these documents.
### DOJ’s Criticism of Apple’s Demand
In its court submission, the DOJ voiced doubts about Apple’s justification for the request, stressing that Apple has been cognizant of Samsung’s relevance to the case and the probability that pertinent documents are in the possession of its Korean parent. The DOJ chastised Apple for the delay in filing this request, contending that the prolonged process of procuring evidence via the Hague Convention is improbable to conclude prior to the deadline for fact-finding.
The DOJ’s document explicitly mentioned that Apple should not leverage this request as a rationale to extend deadlines in the case. It cautioned that if the court were to accede to the request, Apple would assume the risk that the evidence requested from South Korea may not be accessible in time for the trial.
The DOJ’s response incorporated a striking remark:
> “Under no circumstances should the intricate and lengthy foreign judicial process under the Hague Convention serve as grounds for extending the close of fact discovery or otherwise delaying the trial in this matter—especially given Apple’s decision to delay nine months before filing its motion.”
While the DOJ refrained from taking a conclusive position on whether the court ought to grant the Letter of Request, it highlighted the possible delays that could stem from Apple’s efforts to acquire evidence from overseas.
### Conclusion
As the antitrust litigation against Apple unfolds, the friction between the tech company and the DOJ underscores the complexities of legal processes involving international evidence. Apple’s push to secure documentation from Samsung may encounter considerable obstacles, both in terms of timing and legal challenges, as the DOJ underscores the significance of maintaining the established discovery timeline. The repercussions of this situation could affect not only Apple but also the broader competitive landscape within the technology industry.
Wordle Today: Clues and Solution for April 21, 2026
Here’s the answer for “Wordle” #1767 on April 21 as well as a few hints, tips, and clues to help you solve it yourself.
NYT Strands Clues and Solutions for April 21, 2026
The NYT Strands hints and answers you need to make the most of your puzzling experience.
Hints and Answers for NYT Connections: April 21, 2026
Connections is a New York Times word game that’s all about finding the “common threads between words.” How to solve the puzzle.
