—————————-
Is there a new kilogram? Yes and no. A kilogram is still 1,000 grams, but how do you know if a kilogram in your country weighs as much as a kilogram in another country? In the late 1800s, a group of countries agreed to use a standard weight. They made a perfect kilogram and called it “Le Grand K.” They kept it in Paris. It became the standard, and other countries made copies from it. There was a problem, however. Somehow, the weight of Le Grand K changed. Now scientists have found a new way to measure a kilogram. They don’t need Le Grand K any more. There is a new kilogram. (by Prof. Douglas Jarrell)
—————————-
モバイル英語 (Mobile English)
Learn English on your mobile phones at anytime, anywhere!
— 歴史
2018年11月5日「モバイル英語学習」第574号(英語のエッセイ): Daylight Saving Time is 100 Years Old
———————–
Daylight Saving Time is 100 years old this year. It started in the U.S. in 1918. Clocks were moved forward one hour in March so that the sun would come up later and the evenings would stay light longer. This helped to save energy because people didn’t need to use lights in the early evening. Every November, they changed their clocks back. This year, that change came yesterday. Many people now believe that Daylight Saving Time is no longer necessary. It doesn’t save energy because people drive around more. Also, people’s bodies and brains have trouble getting used to the time change. (by Prof. Douglas Jarrell)
———————–
