November 2025

Astronomers from Yonsei University and DESI data analyses indicate dark energy, long believed constant, may be weakening. Corrected supernova results hint that cosmic acceleration is slowing—a possible “cosmic slowdown.” If true, this could help resolve the Hubble tension and redefine how the universe’s expansion and ultimate fate are understood.

Interstellar comet 3I/ATLAS defied expectations during its 2025 solar flyby, brightening far faster than predicted. Observatories worldwide recorded a blue coma rich in exotic gases, suggesting unique chemistry from another star system. Scientists are investigating whether its unusual composition or speed caused the outburst, marking a new interstellar mystery.

Researchers have created a new fiber that surpasses Kevlar in bullet-stopping power while being much thinner. Made by aligning advanced aramid chains with carbon nanotubes, the material absorbs over twice as much energy as previous record-holding fibers. The breakthrough could lead to lighter, stronger armor for military, law enforcement and personal safety uses.

WhatsApp is said to be developing a new lockdown-style mode to enhance security for users at risk of targeted cyberattacks, according to feature tracker WABetaInfo. Spotted in the latest WhatsApp beta for Android 2.25.33.4 update on the Google Play Store, the feature will reportedly let users apply stricter privacy settings with one toggle. It includes protections like IP address masking during calls, blocking media from unknown senders, disabling link previews, and enabling two-step verification, offering stronger, simplified protection for high-risk users.

Students who are looking for a new laptop or to upgrade their current device can check out the list of the best laptops under Rs. 50,000, which includes Asus Vivobook 14, Moto Book 60, Infinix Inbook Air Pro+, Acer Chromebook Plus 15, and Honor MagicBook X16 (2024). These laptops are capable of performing most tasks on a budget. The Asus Vivobook 14 (X1407QA), which features a 14-inch full-HD+ (1,920×1,200 pixels) IPS screen with a 16:10 aspect ratio and a 60Hz refresh rate, is powered by Qualcomm’s octa core Snapdragon X (X1-26-100) processor.

Samsung Galaxy XR could be available in more global markets next year. The company is reportedly planning to launch the device in Germany, France, Canada, and the UK in 2026. The company’s first extended reality (XR) headset could be launched in more regions based on production capacity and the growth of XR apps and experiences.