1. The Universe Explained
... that showed there was no fixed state of rest. Taking this into account, experiments involving the speed of light led to Albert Einstein developing general the theory of relativity. From Einstein we learned space and time are dynamic quantities and the notion of time and length became relative. Energy and mass are ... through the famous equation E=mc2. Space and time not only affect but are affected by everything that occurs in the universe. A remarkable result of Einstein's general theory of relativity is the expansion of the universe. Although this expansion is not noticeable by us hum...
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