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Notes
tuna melt 料理の名前、北米で人気

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Because many people are staying at home every day, they are doing more cooking. For some people, cooking at home is no problem, but life can be difficult for people who don’t usually cook. Don’t worry if you don’t know how to cook. You can find a lot of cooking videos on YouTube. One of these videos was in the American news last week. A politician from Virginia showed how he made a tuna melt, a very popular sandwich in the U.S. He said that it tasted great, but people thought that he was a terrible cook. If you use YouTube, learn to cook from a real chef, not a politician. (by Prof. Douglas Jarrell)
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Image from https://www.seriouseats.com/recipes

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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