Agentic AI refers to artificial intelligence systems that can autonomously perform complex tasks, such as identifying and responding to cyber threats without constant human oversight. In cybersecurity, agentic AI can be used both by defenders to automate threat detection and response, and by attackers to conduct more sophisticated and scalable cyberattacks.

Nation-state cyber activities are a major concern because countries like Russia, China, Iran, and North Korea are increasingly using cyber operations for long-term strategic goals, including espionage, disruption of critical infrastructure, and influencing global events. These actors often have significant resources and advanced capabilities, making their attacks more persistent and damaging than typical cybercrime.

macOS Tahoe 26.2 public beta 2 is a pre-release version of Apple's macOS operating system update that includes new features and improvements. It is available to public beta testers who have enrolled in Apple's Beta Software Program, allowing them to test and provide feedback before the official release.

The macOS Tahoe 26.2 beta 2 introduces an innovative enhancement designed to improve the video call experience, although specific technical details have not been fully disclosed. This update reflects Apple's ongoing commitment to enhancing communication technology on its platforms.

Walmart's Black Friday sale officially begins on November 14, 2025 at 12:01 a.m. ET for general customers. However, Walmart+ members receive a five-hour head start, allowing them to shop beginning at 7 p.m. ET on November 13. This early access advantage gives subscribers first pick at popular items before the general public can purchase them.

Walmart is hosting two major Black Friday sales events in 2025. The first event runs from November 14-16, featuring early Black Friday deals. The second event runs from November 25-30, offering additional discounts both online and in stores. Additionally, Walmart is hosting a Cyber Monday sale on December 1. Walmart+ members receive five hours of early access to all events.

Full-color 3D printing on the Flashforge AD5X means the printer can print objects using up to four different filament colors automatically. It uses an Intelligent Filament System (IFS) that switches between filaments during printing, cleaning the nozzle between color changes to prevent color bleeding and ensure sharp, clean edges.

The Flashforge AD5X achieves high-speed printing with a Core XY motion system that reduces vibration and ensures precise movement. It can reach speeds up to 600 mm/s and accelerations of 20,000 mm/s². Additionally, features like automatic filament switching, nozzle cleaning, and a pressure sensor for automatic bed leveling help maintain consistent print quality even at high speeds.

The India vs South Africa 1st Test 2025 can be watched live on Star Sports Network for television viewers and on the JioHotstar app for mobile and online streaming.

The official match schedule and team squads for the India vs South Africa 1st Test 2025 can be found on the BCCI.tv website, which provides comprehensive details including fixtures, results, videos, points table, stats, and team information.

NYT Pips is The New York Times' first original logic puzzle game, distinct from word-based games like Wordle. In Pips, players arrange dominoes on a grid to satisfy regional conditions marked with symbols. Each region has specific rules: equal signs mean all tiles in that region must have the same number of pips, greater than or less than signs indicate the sum must exceed or fall below a certain value, and other constraints require tiles to sum to specific totals. The puzzle requires logical deduction rather than vocabulary knowledge, making it a constraint-satisfaction puzzle similar to Sudoku in its problem-solving approach.

Effective Pips solving involves identifying constraints that limit domino placement and using logical deduction to narrow possibilities. Players should first inventory their available dominoes and note which pips appear multiple times, as regions requiring all tiles to be equal can only be satisfied by dominoes with matching values. When a region has a greater than or less than constraint, players can eliminate dominoes that don't fit the sum requirement. The key is recognizing when a particular domino must go in a specific location because it's the only piece that satisfies multiple overlapping constraints. This creates an 'a-ha!' moment where the mental map of the solution becomes clear, allowing players to complete the puzzle systematically rather than through trial and error.

SteamOS demonstrates significant performance improvements over Windows 11 across multiple gaming scenarios. In benchmark testing, SteamOS achieved 98.6 fps in Cyberpunk 2077 compared to Windows 11's 85.10 fps (a 15.86% improvement), and showed a 70% performance advantage in Black Myth: Wukong. On handheld devices like the Lenovo Legion Go S, SteamOS delivered 59 fps in Cyberpunk versus Windows 11's 46 fps. Beyond raw frame rates, SteamOS also provides superior battery efficiency, offering over 6 hours of gameplay on 2D indie titles compared to Windows 11's 2.75 hours. These improvements stem from SteamOS being a purpose-built gaming operating system optimized for gaming workloads, whereas Windows 11 is a general-purpose OS that allocates resources less efficiently for gaming tasks.

The primary compatibility challenge with SteamOS involves kernel-level anti-cheat systems used in certain games, which can present issues when running through Proton (the compatibility layer for Linux). Windows 11 maintains full and easy compatibility with every PC gaming launcher on the market, including PC Game Pass, the Riot Client, and other third-party platforms, whereas SteamOS requires additional configuration to support these launchers. However, this gap is narrowing as SteamOS continues to expand its compatibility with non-Steam Deck handhelds and desktop PCs. While Windows 11's broader launcher compatibility remains an advantage, many argue it is easier for SteamOS to add support for additional launchers than for Microsoft to improve gaming performance on Windows, making the compatibility trade-off increasingly favorable for users prioritizing gaming performance.

The massive blooms of Sargassum are primarily caused by deep water upwelling that brings phosphorus-rich nutrients to the ocean surface. This phosphorus promotes the growth of nitrogen-fixing cyanobacteria that live symbiotically with Sargassum algae, supplying essential nutrients in nitrogen-poor waters and boosting the algae's growth. Winds drive this nutrient-rich deep water to the surface, creating ideal conditions for the blooms, which have been especially prominent since 2011.

While nutrient runoff from rivers and Saharan dust have been considered as possible contributors, recent studies indicate that these are not the primary causes of the Sargassum blooms. Nutrient inputs from the Amazon and Orinoco rivers do not correlate well with bloom events, and although Saharan dust contains iron and phosphorus, its input does not match the timing or scale of the blooms. Instead, vertical mixing and upwelling of phosphorus-rich deep ocean water driven by winds are the main nutrient sources fueling the blooms.