ER2021#9(0728)

 As humans became more intelligent, they found new and more effective ways to kill. And as people began living in larger groups, they needed more powerful weapons to defend themselves and fight in wars.

I read "Weird Weapons". A long time ago, weapons were made to kill animals or humans. the weapons were very simple at first, but they developed stronger and more dangerous as humans became more intelligent. Inventors discovered gunpowder in China in the 10th century. this material was used to make strong weapons such as fire rockets, cannons, and bombs, and enabled to kill large numbers of people in wars. I would like to introduce one of the impressive weapons. It is trebuchet. This was used in wars as an effective machine around the sea between southern Europe and Africa in the 12th century. It could carry a heavy weight and its long arm threw rocks, burning oil, or other things that could hurt enemies. This machines was also used to throw the dead animals and people into the place where enemies were because the dead bodies might make the enemies sick and died. I did not know that even dead bodies are used in wars, and I thought it was cruel and ruthless. This book made me sad and panful. However, you should read this story to learn about the history of early people and mistakes of the past.

ER2021#10(0728)

 Living in space may make you taller. When residents of Skylab, an early US space station, returned home, they had grown about centimeters taller. Living in Antarctica will not change your height at all.

 I read "Life on the Edge". This book is about unlikely, dangerous, forgotten homes. The first place is Scott Bace in Antarctica. Many kinds of researchers live there. This place is a research center for scientists studying various things like climate change. Antarctica is a very cold and dark place, so it is fun for people who like to spend in the cold and dark. The second place is the International Space Station (ISS). It is 350 kilometers above the Earth. Since it is traveling at 28000 kilometers per hour, it takes only two days to arrive there. The ISS has many things to live such as beds, showers, food, so you can live almost life on earth. However, it is difficult to swallow food because there is not gravity. In this way, you can learn about various strange places.

ER2021#8(0728)

 Would you like to go hiking in a rainforest in the morning and then swim with fish and turtles in the afternoon? Is your dream vacation watching whales jump out of the ocean while you swim? How about seeing 33 different kinds of lemurs? 

 If you answered "yes," then Madagascar is the place for you!

 I read "Madagascar".  You can learn about Madagascar, where is the fourth largest island in the world. It locates in the Indian Ocean, and the east coast of Africa. It has various plants and animals that live only there. For example, there are interesting chameleons. They may make their body green when they are happy, and they may change their body's color to yellow when they are angry. Moreover, there are lemurs. this species have many different sizes and shapes. After they eat many different kinds of fruit, they leave the seeds around there, so the seeds grow and new plants are generated. Therefore, lemurs are very important animals to develop their environment and ecosystem.

ER2021#7(0728)

  With a scream of pain, he felt the enormous boulder crash down on his right hand. Shaking from the pain and the shock, Aron slowly opened his eyes.What he saw filled him with horror.

 I read "Trapped!" The main character is Aron, an experienced climber, 27 years old. he had climbed many mountains and this time he climbed down the final section of the canyon that is easy for him. However, he moved slowly down the canyon, a large rock was blocking his path. He tried to climb up this, but suddenly the rock fell down and his right arm crushed under the a lot of rocks. from then, he tried to pull his arm out of the rocks, or he tried to cut down his own arm, but he could not do it. Eventually, he managed to survive, but he had been there for about a week. It is very scarey experience, and I think you should not be careless about anything even though it is easy things for you because bad or dangerous things may happen.

ER2021#6(0616)

 I read "Secrets to A Long Life."

 Often on TV or in magazines we see the rich and famous: successful film stars, singers, and sports people. They live in beautiful homes. They drive expensive cars. They even have their own planes. Sometimes we may think, "Wouldn't it be great to be like them!" But how we know the rich and famous are happy?

Having a lot of money does not always lead to happiness. This book shows what to do to be happy and live longer. In chapter 2, it mentions the importance of having good relationship with other people to be live longer. For example, according to Brigham Young University's study, people who have good friends had 50 percent more chance of living longer. I thought being happy and not being lonely lead to longer life. In chapter 4, it describes the relation between death and environment. Surprisingly, people in cities live longer and healthier lives. Furthermore, people can drive faster in the countryside, so there are more deaths from traffic accidents in the countryside than in cities. In this way, I could learn the way to live long. I thought if I feel happier and less stressful, I can live well.

ER2021#5(0616)

 A poison can be thought of as any chemical substance that causes a harmful change in the body. Medically, it is hard to define a poison, because any cause illness, harm bodily functions, or cause death.

I read "Poison".  I could learn the types, mature, story, and history about poison. It was particularly impressive that poison was used first more that 4500 years ago, and it was used as poisoned spears and arrows for war. Moreover, the various toxic animal was introduced. For example, most poisonous frogs produce their venom from their skin. Some types of their venom contain enough poison to kill ten adult people. This face is so scared that human may be killed even such small animals. In conclusion, I could know the danger of poison again, and I wanted to know more about other poisonous creatures from now on.

ER2021#4(0615)

  Did you know that you have a 1 in 10,000 chance of getting hit by lightning? Or that you have a 1 in 175,711,536 chance of winning the Mega Millions lottery? You have a much better chance of being born with eleven fingers or eleven toes − that's 1 in 500.

 I read "What are the odds?"

This book is about "the odds". The chance or probability is called "the odds". For example, the probability that the sun will rise in the east tomorrow morning is 100%. However, the other things such as the chance that you will get a hole in one when you play golf, and you will die due to lightning. In this way, this book describes the possibilities of such various events or happenings. What I found particularly interesting was the story about the chance that nature can hurt you. According to this, men are much more likely to get damaged by lightning than women because men tend to keep doing outside although women are likely to go inside when they see lightning. It is interesting for me to know the difference of thoughts between men and women. In conclusion, if you read this book, you may be able to know the new information. I would like you to read this.