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mAh means milliampere-hour, a measure of battery charge capacity. A 2,000 mAh battery can in theory supply 2,000 mA for one hour or 200 mA for 10 hours; watt-hours (mAh x volts / 1,000) are better for comparing different batteries.
Deep Review is an AI system from Google Research that checks long technical documents, such as research papers, design documents, presentations and legal or financial documents, for logical gaps, mathematical errors, internal inconsistencies and unsupported claims. Google released it publicly on October 14, 2026. It grew out of Google’s experimental Paper Assistant Tool, which gave … Read more
A QR code stores data in a grid of black and white modules. Three corner position patterns let a scanner locate and orient it from any angle, and Reed-Solomon error correction can restore data if part of the code is damaged.
Skype calls are no longer available, free or paid. Microsoft retired Skype on May 5, 2025, and moved users to Microsoft Teams Free.
The Federal Aviation Administration (FAA) is reviewing a SpaceX proposal that would allow up to 456 Starship-Super Heavy launches and up to 912 landings per year at the Boca Chica Launch Site at Starbase, Texas. SpaceX is currently authorized for up to 25 launches and 50 landings (25 of Starship and 25 of Super Heavy) … Read more
Pencils are made of a graphite-and-clay core inside a wooden casing, usually incense cedar. Pencil lead contains no lead; the clay-to-graphite ratio sets how hard or soft the pencil is.
AlphaProof Nexus is a Google DeepMind system that uses large language model agents to write mathematical proofs in Lean, a formal proof language whose compiler checks every logical step, so a finished proof cannot hide a reasoning error. The paper describing it, led by George Tsoukalas and colleagues, was published in Science on 8 October … Read more
Yes. Airplane mode turns off cellular (and often Wi-Fi/Bluetooth) radios so the phone stops hunting for signal; Apple says that helps battery life especially with no coverage.
Ada Lovelace Day is an international celebration of the achievements of women in science, technology, engineering and maths (STEM), meant to raise their profile and create role models who encourage more girls into STEM careers. It was founded in 2009 by Suw Charman-Anderson and is now held every year on the second Tuesday of October, … Read more
Microsoft Points were a digital currency for Xbox and Zune purchases, introduced in 2005 and retired in 2013 when Microsoft switched to local currencies.