One truly elegant hypothesis of physics is the "zero-energy universe" hypothesis. It proposes that the net sum of the energy in the universe perfectly equates to zero. According to the idea, if ...

This is because melting the ice has not created or destroyed any atoms and the mass has stayed the same. This is known as the law of conservation of mass. It applies to both chemical reactions and ...

Speaking of forces, that was Newton's second law: forces applied to an object give them acceleration, with the amount of acceleration dependent on the object's mass. This, too, went against the ...

This is what brought us to the insight that this is strikingly identical to a fundamental law of physics: the conservation of matter. It states that matter cannot be created or destroyed ...