Is 170,141,183,460,469,231,731,687,303,715,884,105,727 prime? Before you ask the Internet for an answer, can you consider how you might answer that question without a computer or even a digital calculator? In the 1800s French mathematician Édouard Lucas spent years proving that this … Read more
When do we have a scientific fact? Scientists, policymakers, and laypersons could all use an answer to this question. But despite its obvious importance, humanity lacks a good answer. The renowned biologist Ernst Mayr was one scientist—probably one of many—frustrated by the … Read more
TL;DR I found a non-OEM electronic gadget in my car. It is wired into the ignition, and contains a 435.10 MHz radio reciever, a microcontroller, and two relays. I suspect it might be a device that allows third parties to … Read more
APOD: 2021 November 14 – How to Identify that Light in the Sky Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation w ritten by a professional … Read more
Mar 20 2021 三人行，必有我師焉；擇其善者而從之，其不善者而改之。 — 孔子 (Confuscius, in the Analects) As recorded in the Analects, Confucius put it succinctly — “When walking in a group of three, there is bound to be someone I can learn from: There will be … Read more