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Momentum, Force, Inertia, Middle Ages, Buridan

WHAT’S MASS? It is not an easy question. An answer for inertial mass was given seven centuries ago. Astoundingly, it’s still the foundation of...

Is This Why We Are Alone?

Why We Are Alone: Earth Is Both Very Watery & Very Radioactive
Our giant galaxy is at least ten billion years old. It has 100 billion stars. Many of them second generation stars. It would seem...