ns

• ancient greeks - nothing comes from nothing
• nasir al-din al-tusi - body of matter could not disappear
• antoine lavoisier - law of conversion of mass
• galileo galilei - pendulum ; father of modern physics
• christian huygens - collisions
• gottfried wilhem leibniz - mathematical formulation
• albert einstein - mass and energy
• john wallis - law of conservation of momentum
• isaac newton - quantity of motion