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Radioactivity — Marie Curie Discovers Radium and Polonium
In December 1898, Marie and Pierre Curie announce the discovery of two radioactive elements: polonium (July 1898, 400× more active than uranium) and radium (December 1898, ~900× more active) — extracted from tonnes of pitchblende through fractional chemistry techniques.
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Launch of the heterogeneous Raspberry Pi Pico 2 board (RP2350)
Raspberry Pi Ltd has officially launched the Pico 2. Built on the new RP2350 chip, it lets developers choose between two ARM Cortex-M33 cores, two RISC-V cores, or one core of each type.
Special relativity — Einstein reinvents spacetime (1905)
In 1905, Albert Einstein, a clerk at the Bern Patent Office, published four papers that refounded physics. Special relativity unifies space and time; E=mc² reveals that 1 kg of matter contains 9 × 10¹⁶ joules — the equivalent of 21.5 megatons of TNT.
General Relativity — Einstein Curves Spacetime
On 25 November 1915, Albert Einstein presented his field equations to the Prussian Academy of Sciences: gravity is not a force, but a curvature of spacetime caused by mass and energy. Confirmed 100 years later by the detection of gravitational waves, it is the framework that governs the universe at large scales.