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US Military Ends 72-Year Mandatory Flu Shot Policy
3 Million Ounces of Gold and 28 Million Ounces of Silver Taken Out the Back Door
Hear from a Missouri farmer: Blake Hurst shares that rising input costs, among other pressures...
Researcher wins 1 bitcoin bounty for 'largest quantum attack' on underlying tech
Interceptor-Drone Arms-Race Emerges
A startup called Inversion has introduced Arc, a space-based vehicle...
Mining companies are using cosmic rays to find critical minerals
They regrew a severed nerve - by shortening a bone.
New Robot Ants Work Like Real Insects To Build And Dismantle On Their Own
Russian scientists 'are developing the world's first drug to delay ageing' months after
Sam Altman's World ID Expands Biometric Identity Checks
China Tests Directed Energy Beam That Recharges Drones Mid-Flight
Jurassic Park might arrive sooner than expected, just with Dinobots.

A new class of reaction drive is discussed, in which reaction mass is expelled from a vehicle using power extracted from the relative motion of the vehicle and the surrounding medium, such as the solar wind. The physics of this type of drive are reviewed and shown to permit high-velocity
