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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Notes
lithium battery リチウム蓄電池;
power (動詞)充電する、電力を送る;

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Yoshino Akira has won the Nobel Prize for Chemistry together with John B. Goodenough and M. Stanley Whittingham. The three scientists were given the prize for their research on the lithium battery. This battery has changed the world. Older batteries were weaker, and they were much bigger. Lithium batteries are strong and much smaller, and they can be recharged many times. They power many things such as mobile phones, computers, and electric cars. Thanks to discoveries by Whittingham and Goodenough, Yoshino was able to create the first workable lithium battery. (by Prof. Douglas Jarrell)
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