1 . If humans were truly at home under the light of the moon and stars, we would go in darkness happily, the midnight world as visible to us as it is to the vast number of nocturnal (夜间活动的) species on this planet. Instead, we are diurnal creatures, with eyes adapted to living in the sun’s light. This is a basic evolutionary fact, even though most of us don’t think of ourselves as diurnal beings. Yet it’s the only way to explain what we’ve done to the night: We’ve engineered it to receive us by filling it with light.

The benefits of this kind of engineering come with consequence called light pollution whose effects scientists are only now beginning to study. Light pollution is largely the result of bad lighting design, which allows artificial light to shine outward and upward into the sky. Ill-designed lighting washes out the darkness of night and completely changes the light levels and light rhythms to which many forms of life, including ourselves, have adapted. Wherever human light spills into the natural world, some aspect of life is affected.

In most cities the sky looks as though it has been emptied of stars, leaving behind a vacant haze (霾) that mirrors our fear of the dark. We’ve grown so used to this orange haze that the original glory of an unlit night—dark enough for the planet Venus to throw shadow on Earth—is wholly beyond our experience, beyond memory almost.

We’ve lit up the night as if it were an unoccupied country, when nothing could be further from the truth. Among mammals alone, the number of nocturnal species is astonishing. Light is a powerful biological force, and on many species it acts as a magnet. The effect is so powerful that scientists speak of songbirds and seabirds being “captured” by searchlights on land or by the light from gas flares on marine oil platforms. Migrating at night, birds tend to collide with brightly lit tall buildings.

Frogs living near brightly lit highways suffer nocturnal light levels that are as much as a million times brighter than normal, throwing nearly every aspect of their behavior out of joint, including their nighttime breeding choruses. Humans are no less trapped by light pollution than the frogs. Like most other creatures, we do need darkness. Darkness is as essential to our biological welfare, to our internal clockwork, as light itself.

Living in a glare of our making, we have cut ourselves off from our evolutionary and cultural heritage—the light of the stars and the rhythms of day and night. In a very real sense light pollution causes us to lose sight of our true place in the universe, to forget the scale of our being, which is best measured against the dimensions of a deep night with the Milky Way—the edge of our galaxy—arching overhead.

2 . In some islands north of Scotland, head lice, which live on the hair or skin of people or animals, were a part of life. If the lice left their host, he became sick and feverish. Therefore, sick people had lice put in their hair intentionally. There was a method to their madness: As soon as the lice had settled in again, the patient improved. The story explains the confusion of cause and effect. If the lice leave the sick, it is because he has a fever and they simply get hot feet. When the fever breaks, they return. We may laugh at this story, but false causality misleads us practically every day.

Consider the headline: “Fact: Women Who Use Shampoo XYZ Every Day Have Stronger Hair.” This statement says very little — least of all, that the shampoo makes your hair stronger. It might simply be the other way round: Women with strong hair tend to use Shampoo XYZ — and perhaps that’s because it says “especially for thick hair” on the bottle.

A further example: Scientists found that long periods in the hospital did harm to patients. This was music to health insurers’ ears, who, of course, are keen to make stays as brief as possible. But, clearly, patients who are dismissed immediately are healthier than those who must stay on for treatment.

Recently I read that students get better grades at school if their homes contain a lot of books. This study was surely a shot in the arm for booksellers, but it is also an example of false causality. This simple truth is that educated parents tend to value their children’s education more than uneducated ones do. Plus, educated parents often have more books at home. In short, a dust-covered copy of War and Peace alone isn’t going to influence anyone’s grades; what counts is parents’ education levels, as well as their genes.

Another example of false causality was the supposed relationship between the birth rate and the numbers of stork (鹳) pairs in Germany. Both were in decline, and if you plot them on a graph, the two lines of development from 1965 to 1987 appeared almost the same. Does this mean the stork actually does bring babies? Obviously not, since this was a purely accidental connection.

In conclusion: Connection is not causality. Take a closer look at linked events: Sometimes what is presented as the cause turns out to be the effect, or just the other way around. And sometimes there is no link at all — just like with the storks and babies.

4 . The Life Cycle of a T-shirt

We all probably have a lot of T-shirts, but do you ever stop and think about the influence of a T-shirt on the planet? You’d probably be surprised to learn what’s involved in the life cycle of   just one T-shirt.

There are 5 major stages: material, production, shipping, use and disposal. The material stage involves farming, irrigating, fertilizing, harvesting and ginning. While cotton is a natural fiber and not as harmful to the environment as man-made fibers, it still takes a toll in the material and production stages. Commercial cotton farming uses a large amount of water, and the use of pesticides (杀虫剂) is widespread across the globe, especially in cotton farming. Studies have shown that farmers spend around $4.1 billion on pesticides annually, of which 25% was spent on cotton crops in the US.

Once the cotton is grown and harvested, so begins the production stage: spinning, knitting, bleaching, dyeing, cutting, sewing, etc. — these processes also use a great deal of water and energy. Commercial dyes and bleaches are harmful pollutants and can eventually pollute groundwater.

After the T-shirt is produced, it enters the transportation stage. This often involves overseas shipping. Take a look in your closet. Chances are that most of your cotton garments (衣服) are made in China or India. Garments can be shipped via plane, ship or truck..., all of which spill CO₂, into the atmosphere. Calculations show that CO₂ emissions from light trucks alone amount to        1.15 pounds per mile.

Once the T-shirt reaches the retail market, it is purchased. This stage may seem like the least environmentally damaging part. But consider the number of times you’ve washed and dried your favorite T-shirt. Washing machines are certainly becoming more efficient. However, the average American household does 400 loads of laundry per year, using about 40 gallons of water per load. Such excessive water use is combined with the large amount of energy used by dryers.

The final stage of life is disposal. This releases harmful emissions, or involves a landfill where cotton takes years to break down. Current US records show that an estimated 15% of clothes and shoes are recycled, which means that consumers send a shocking 85% of these materials to landfill.

We all need new clothes every once in a while, but let’s all try to keep in mind what goes into the production of clothing. It has a real impact on the planet.

There are a lot of things you can do to help reduce your impact. Reuse and recycle clothes. If they’re too worn out to wear, cut them up and use them as cleaning rags. Donate them to charity or another organization that recycles textiles. When possible, make an effort to buy organic cotton. Turn down the thermostat on your washer, and line dry your clothes when the weather will allow it.

6 . What’s the first thing you remember doing? It could be playing with your friends at school, or going to a birthday party and eating amazing cake.     1     Did those special moments really happen or did we make them up?

It’s a strange concept to grasp, but according to research, about four out of ten of us invent our first childhood memory. Rather than having experienced something, we could have fabricated a fake memory from videos or photos we’ve seen. We could have been influenced by a story recounted to us that spurs our minds on to adopt someone else’s memory as our own.     2    

    3     Well, our ability to retain memories from before the age of two isn’t great. While at that age we do have short-term memories, according to Catherine Loveday, an expert in autobiographical memory at the University of Westminster, the memories that infants make are not long-lasting.     4     Some scientists also believe that as we get older, our childhood memories fade and after the age of seven, we get some kind of “childhood amnesia (健忘症)”.

So why do we create fake memories? Some experts believe that there is a clear desire for a sense of self and having a cohesive (连贯的) story of our existence.     5     As we get older, we want to have a complete picture of our entire lives.

So, the next time someone says they have a clear memory from when they were one or even before just remember that while it could be true, there’s a chance they just invented it at some point in their lives.

8 . The Day Lisa Lost

Don’t get me wrong. I’m not talking about the many professional athletes of today who have developed a me-first attitude. I am talking about high school sports, where lessons of life are still being learned. Here, athletes still compete for the love of the game and their teammates. Lisa Kincaid is one of them.

I first met Lisa on the volleyball court. If anyone had a right to be cocky (自大的) or proud of herself, it was Lisa. Besides being one of the best volleyball players in the USA, she became a track legend (传奇人物) . She went sixty-four national games without losing any event.

However, she felt uncomfortable talking about her achievements and would usually change the conversation to others’ performances. She often lent her shoes to someone who’d forgotten her own, or sincerely sent best wishes to competitors from different teams.

Soon after, Lisa’s impossible failure in one game impressed me a lot. Lisa’s coach told her he needed her to run the mile. She had never done so, but agreed to do what was best for the team. Lisa easily outdistanced the competition, but on the last lap she seemed to grow tired. Jane, Lisa’s teammate, passed her. Lisa managed to stay just behind Jane and followed her across the finish line. Lisa lost an event for the first time in her track career.

Athletes in Lisa’s track program needed to earn a set amount of points to gain a varsity letter (校队标志微章). Lisa knew that Jane needed to finish first to earn a letter for the first time. Without Lisa, Jane would make it. Lisa remembered all this as she lined up for the start of that race. It suddenly struck me why she wore a slight smile on her face after having “lost” for the first time ever. Jane finally received her first varsity letter. And Lisa? On that day, the day she lost, she earned my respect and admiration.

ROSS TOWNSHIP, OHIO—Some Ohio high school students are regional winners in a national contest after inventing a mobile device app that helps needy families find local food pantries (食品储藏室).

And someday the teens, who are students at Ross High School in Ross Township, may be selling the app to food pantries and food banks across America.

Their “Smart-Pantry” app has won the local U. S. Congressional App Challenge, which spans 47 states and territories, for the 8th Congressional District that includes their Butler County school system of Ross Schools.

Created as part of computer science class coordinated by Butler Tech career school system at the high school—three students, Jacob Kahmann, Gunner Nonnamber and Kyle Inderhees, recently were visited by Congressman Warren Davidson, R-Troy. Davidson issued a statement praising the teens for creating “this app to set the standard for efficient food collection and distribution.”

Butler Tech IT Instructor Tom O’Neill said the students’ app includes features that help users locate the nearest food pantry, improve food collection procedures and allows pantries to better monitor for fraud (欺骗) by users, and the national challenge provides a real-life learning opportunity for his students.

“The Congressional App Challenge provides my students with an opportunity to develop solutions to real-world problems. This app helps people locate food pantries and is designed to increase efficiency at food pantries and food banks,” said O’Neill.

The students are continuing to add features to the app and are working on turning it into a commercial product, said O’Neill, who in recent years helped numerous Ross High School teens win national honors for their computer-science-based inventions.

Brian Martin, principal of Ross High School, said it’s “extremely exciting” to watch students excel on the state, national and international stages.

“The staff and students in the Ross school district continue to amaze me with their future-thinking and innovation,” said Brian Martin. “Our students are not only thinking about carecrs, they are thinking about problems and issues they want to change, solve or improve. The app that was created is very unique and will make serving a population in need more efficient.”

The three inventors will be invited in the spring to a Congressional App Challenge hosted by Congress in the nation’s capital.