【推荐1】One morning a deer rushed into a courtyard where a little boy was playing. The deer hooked the boy's clothing with its antlers(角).This scared the little boy so much that he let out a loud cry which brought his mother running out to see what was happening. She came out just in time and saw the deer running off towards the mountains with her little boy.

The mother was so afraid !She ran after the deer as fast as she could and   not too far away. she found her son sitting on the grass safely. Seeing his mother. the little boy laughed and reached out his arms to her. His mother held him tight. She was so happy that she cried.

She hurried back with her dear son. When she got home, she was amazed at what she saw. The huge tree behind her house had fallen down while she was out running after the deer. The whole house was destroyed under the tree's great weight.

Then the mother remembered the day about a year before when a deer fleeing from a hurt had run into her house. She felt sorry for the frightened deer, so she covered it with some cloth and let it return to the forest.

The deer seemed to understand that she had saved its life. When leaving, it kept bowing its head to her as if it were thanking her for her kindness.

She never imagined that the deer could remember her help. It somehow knew the tree were going to fall and kill her and her son, so it came back to save them.

When the mother remembered all this, she said, “Saving the life of another is the same saving the life of your own.”

【推荐1】We’ve known that sitting for long periods of time every day has countless health consequences, like a higher risk of heart disease. But now a new study has found that sitting is also bad for your brain.

A study published last week, conducted by Dr. Prabha Siddarth at the University of California, showed that sedentary(久坐的) behavior is associated with reduced thickness of the medial temporal lobe(中颞叶), a brain area that is critical to learning and memory.

The researchers asked a group of 35 healthy people, ages 45 to 70, about their activity levels and the average number of hours each day spent sitting and then scanned their brains. They found that the subjects who reported sitting for longer periods had the thinnest medial temporal lobes. It means that the more time you spend in a chair the worse it is for your brain health, resulting in possible damage to learning and memory.

What is also interesting is that this study did not find a significant association between the level of physical activity and thickness of this brain area, suggesting that exercise, even severe exercise, may not be enough to protect you from the harmful effects of sitting.

It then surprisingly turned out that you don’t even have to move much to enhance cognition(认知); just standing will do the trick. For example, two groups of subjects were asked to complete a test while either sitting or standing. Participants are presented with conflicting stimuli(刺激) , like the word “green” in blue ink, and asked to name the color. Subjects thinking on their feet beat those who sat by a 32-milicond(毫秒) margin.

The cognitive effects of severe physical exercise are well known. But the possibility that standing more and sitting less improves brain health could lower the bar for everyone.

I know, this all runs counter to received ideas about deep thought, from our grade school teachers, who told us to sit down and focus, to Rodin’s famous “Thinker,” seated with chin on hand.

They were wrong. You can now all stand up.

【推荐3】German physicist Albert Einstein is one of the most famous scientists of all time, the personification of genius and the subject of a whole industry of scholarship. In The Einsteinian Revolution, two experts on Einstein’s life and his theory of relativity―Israeli physicst Hanoch Gutfreund and German historian of science Jurgen Renn—offer an original and penetrating(厚利的) analysis of Einstein’s revolutionary contributions to physics and our view of the physical world.

By setting Einstein’s work in the long course of the evolution of scientific knowledge, Gutfreund and Renn discover the popular misconception of Einstein as an unconventional scientific genius who single-handedly created modern physics—and by pure thought alone.

As a large part of the book explains, Einstein typically argued that science progresses through steady evolution, not through revolutionary breaks with the past. He saw his theory of relativity not as something from scratch, but a natural extension of the classical physics developed by pioneers such as Italian astronomer Galileo Galilei and English physicist Isaac Newton in the sixteenth and seventeenth centuries, as well as nineteenth-century physicists.

The authors highlight how classical physics cannot be separated cleanly from modem Einsteinian physics. The book also includes substantial sections on Polish astronomer Nicolaus Copernicus and Galileo whose methods inspired Einstein. When Einstein considered himself as standing on their shoulders, he meant that, without their contributions, he would not have formulated(阐述) the theory of relativity.

The Einsteinian Revolution is an important and thought-provoking contribution to the scholarly literature on Einstein and his surprising scientific creativity between 1905 and 1925. Gutfreund and Renn might not have given the final answer as to why Einstein, of all people, revolutionized physics in the way that he did. But they argue in fascinating detail that, to understand his genius, one must take into account not just the earlier history of physics but also the history of knowledge more broadly. Although not always an easy read, the book will interest physicists and historians alike.