When did libby discover carbon dating dating personality questions

Heraclitus - Greek philosopher; first of the Greeks to develop a theory of the human soul; he praised its creative resources and spoke of the importance of self-exploration; he spoke of the logos that is common to all and said that the universe is ruled by logos; he always urged that close attention be given to the polarites and concealed structures emodied in language.His famous claim that an idividual can and cannot step into the same river twice reveals an interest in criteria of unity and identity; even though all material constituents have undergone change, it is still, in a sence, the same river.Issac Newton - English mathematician and scientist; developed theory of matter; first to demonstrate the color components of white light with a prism and the reconstruction of these colors into white light with a second prism; researched the optical characteristics of chemical substances; studied gravitation and motion; developed the law of gravitation.Ole Christensen Roemer - Denmark; was the first to show that the velocity of light is finite.

In his treatise, 'On the Revolutions of the Celestial Spheres' he postulated that the planets, including the earth, revolve around the sun, and that the earth revolved around its axis once every day.Empedocles - Some suggest (c.484-c.424) - Greek doctor, poet and philosopher.To account for real change, he assumed that there must be more than one kind of matter, and he postulated four roots as elements; earth, air, fire, and water.The work had a hostile reception when it was published (1543), as it challenged the ancient teaching of the Earth as the centre of the universe.In the 1600' Galileo and Kepler began to develop the physics that would prove Copernicus right.

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