What is the nature of the scientific attitude, the attitude of the man or woman who studies and applies physics, biology, chemistry, geology, engineering, medicine or any other science?

    We all know that science plays an important role in our societies. However, many people believe that our progress depends on two different aspects of science. The first aspect is the application of the machines, products and systems of knowledge that scientists and technologists develop. The second is the application of the special methods of thought and action that scientists use in their work.

    What are these special methods of thinking and acting? First of all, it seems that a successful scientist is curious - he wants to find out how and why the universe works. He usually pays attention to problems which he notices have no satisfying explanation, and looks for relationships even if the data available seem to be unconnected. Moreover, he thinks he can improve the existing conditions and enjoys trying to solve the problems which this involves.

    He is a good observer, accurate, patient and objective and uses the facts he observes to the fullest. For example, trained observers obtain a very large amount of information about a star mainly from the accurate analysis of the simple lines that appear in a spectrum(光谱).

    He does not accept statements which are not based on the most complete evidence available. He rejects authority as the only basis for truth. Scientists always check statements and make experiments carefully and objectively.

    Furthermore, he does not readily accept his own idea, since he knows that man is the least reliable of scientific instruments and that a number of factors tend to disturb objective investigation.

    Lastly, he is full of imagination since he often has to look for relationships in data which are not only complex but also frequently incomplete. Furthermore, he needs imagination if he wants to guess how processes work and how events take place.

    These seem to be some of the ways in which a successful scientist or technologist thinks and acts.

    Using too much water or throwing rubbish into our rivers are clear ways that humans can put our water supply in danger , but we also affect our water supply in less obvious ways. You may wonder how paving(铺砌) a road can lead to less useable fresh water. A major part of the water we use every day is groundwater. Groundwater does not come from lakes or rivers. It comes from underground. The more roads and parking lots we pave ，the less water can flow into the ground to become groundwater.

    Human activity is not responsible for all water shortages(短缺). Drier climates are of course more likely to have droughts(干旱) than areas with more rainfall, but in any case, good management can help to make sure there is enough water to meet our basic needs.

    Thinking about the way we use water every day can make a big difference, too In the United States , a family of four can use 1.5 tons of water a day! This shows how much we depend on water to live, but there's a lot we can do to lower the number.

    You can take steps to save water in your home. To start with use the same glass for your drinking water all day. Wash it only once a day. Run your dishwasher (洗碗机)only when it is full 。Help your parents fix any leaks in your home. You can even help to keep our water supply clean by recycling batteries instead of throwing them away.

    It was another frustrating day. I came home from school, changed my clothes and got ready for work. I worked at a local restaurant in town.

    I went to work feeling down. It's the same thing over and over again, dealing with customers who complain about their food—how the piece of pie that they are served is too big or too small. Three elderly ladies walked in and sat by the windows. I was working since 5:00 pm. and we were quite busy. But these elderly women were watching me as I was working really hard to make sure every table was clean and ready for the next customers.

    When they were finished with their meals, I took their plates back to the kitchen. They talked to me for a while about school, how I was doing, which grade I was in and what I planned to do in the future.

    As they were leaving, they walked past me and one of them said to me in a confident and gentle voice, "You are going places." They left the restaurant and I was pretty much in awe. I had tears in my eyes, because they gave me a reason to believe in myself. They picked my spirits up from being down and out and gave me a reason to keep on working hard and to give it my all.

    Envelope Budget

    From McDonald's to Sonic, fast food had a bad effect on my waistline and my budget. It was nothing to run to a drive-through to pick up a cold drink or a quick bite to eat. It was so easy to use my card for a small purchase. For me, I got a lot of satisfaction from fast food.

    One day I sat down and calculated that I was spending a surprising $40 a week on fast food. This was a lot of iced coffee and hamburgers! Instead of reducing my guilty pleasures, I decided to give myself a strong budget to reduce my consumption. Every Monday I placed an envelope with $20 in my purse. That was my fast food budget for the entire week. If there was anything left over at the end of the week, it was mine to save or spend. If I spent all of the money during the week, there were no more fast food stops that week.

    The budget made me more mindful of my purchases. Instead of purchasing a large drink from Sonic, I would purchase a small. It was sill satisfying but not nearly as pricey. Instead of eating a whole meal, I would pick the part that I actually wanted. Many days, the thought of hanging onto the money for a special purpose meant more to me than the instant satisfaction of fast food. I never really felt unhappy because it was a conscious choice to spend or save with each purchase.

    Envelope budget kept me honest. I had a clear idea how much money was spent each week on fast food purchases. I started to bring my lunches more often to save more money for the week. It was a fun challenge to see how much I could save every week.

    Changing the way I spent on fast food not only helped my budget, but improved my weight. In the first month I was able to get rid of 5 pounds by simply changing the way I approached spending on fast food. Now I am more likely to bring my lunch than to buy it. I am not upset, but empowered to make positive choices to improve my life.

    Four books that will change your life

    If you're already working 9-5, you might not have much time to read. With the Blinkist app, you can get the key information from the best nonfiction books in minutes, not hours or days. Start with the four most-read titles on self-improvement.

    Thirteen Things Mentally Strong People Don't Do by Amy Morin

    You can't escape misfortune in life. But you can change how you respond to it. Do you struggle to get over your failures? Or live with things out of your control? Getting over these troubles can have a great influence on your everyday life, Morin shares how her most successful therapy（治疗）patients overcame these difficulties.

    How to Stop Worrying and Start Living by Dale Carnegie

    Ever wondered why you can't stop worrying about something? No matter how hard you try, do you focus on the same issue? By defining the source of your stress, you can get over it once and for all. Camegie came up with an effective way that helps you deal with any over-thinking situation.

    Finding Your Element by Ken Rotoinson

    Society often encourages us to follow a certain linear plan. Everyone has a passion. If you don't know what yours is, it just means you haven't discovered it yet. Or perhaps you have, buth disappeared early in life. Find out how you can break free of society's strict rules and find your calling in life.

    Emotional Intelligence by Daniel Goleman

    Did you know if your pulse rate rises above 100 bpm, you're considered too emotional to think rationally（理智地）? You probably let feelings cloud your judgment more often than you know. Goleman explains how you can avoid letting your emotions rule you and make better decisions in life.

    Researchers at the University of York in England published their findings on facial recognition that, on average, people can remember as many as 5,000 faces.

    There have been many studies recently on facial recognition technology. But the authors of this study say theirs is the first time that scientists have been able to put a number to the abilities of humans to recognize faces. Rob Jenkins, leader of the research, said the researchers' study centered on "the number of faces people actually know." and were not able to discover whether there is a "limit on how many faces the brain can handle."

    Jenkins said the ability to tell individual people apart is "clearly important." In today's modern world of big cities, we meet and deal with thousands of people. The study suggests our facial recognition abilities help us to deal with the many different faces we see on the screens, as well as those we know. The results of the study give a baseline for comparing the "facial vocabulary" of humans with facial recognition software.

    Today, facial recognition technology is used in many ways, including by law enforcement agencies to prevent crime and violence. Governments use it to keep secret areas secure and, in extreme cases, control populations. Some governments use the software to watch people and find out where they go and what they do. Even Facebook uses facial recognition. For example, when you name a friend, Facebook technology may recognize the person's face from a different picture you had shared before.

    For the human study, people spent one hour writing down as many faces from their personal lives as possible. At first, they found it easy to come up with many faces. But by the end of the hour, they found it harder to think of new ones. Their change in speed let the researchers estimate when they would have run out of faces completely. 1,000 to 10,000 faces remembered. People who took part in the study were also shown thousands of photographs of famous people. Researchers asked them which ones they recognized. To make sure they knew these people, researchers required them to recognize two different photos of each famous person. The results showed that the participants knew between 1,000 and 10,000 faces.

    How do they explain such a wide range? Jenkins said one explanation may be that some people have a natural ability for remembering faces. "There are differences in how much attention people pay to faces and how well they process the information." Also it could be because of different social environments. Some people may have grown up in more populated places. So, they may have had more social contact throughout their lives.

    Researchers think age may be an interesting area for further research. “It would be interesting to see whether there is a peak age for the number of faces we know”, Jenkins said. He said it is possible that we gather more faces throughout our lifetime. But, he added, there also may be an age at which we start to find it harder to remember all of those faces.