Notes
the theory of relativity 相対性理論;
precise 正確な、精密な;
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Albert Einstein changed the world of physics with his ideas at the beginning of the 20th century. One of his most important ideas is called the theory of relativity. His ideas are difficult to understand, but scientists have shown that they are correct. Recently, scientists did an experiment with clocks at Tokyo Skytree. These clocks are very precise. They can measure very small differences in time. When the scientists measured time at the top of Skytree, they showed that it went faster than at the bottom of the tower. That is something that Einstein understood 100 years ago. (by Prof. Douglas Jarrel)
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