The plants grown by Wageningen University researchers in Mars-like soil back in March have been analyzed and the results are excellent: at least four of the crops do not contain harmful heavy metal levels and are perfectly safe to eat, the University researchers report.

    If you've seen The Martian, you can remember how much Matt Damon got done living off of his poo-powered crop of potatoes. It just goes to show how important it is for a long-term colony to be able to grow their own food locally. We've taken one step closer to that goal in March, when Netherlands' Wageningen University reported that they've managed to grow ten different crops in Mars-like soil.

    However, growing food doesn't do us much good if eating it kills us, and researchers were worried that these crops contained dangerous heavy metals like lead or cadmium(镉) from the martian soil. But future colonists are delighted, as lab analysis of the crops determined that at least four of them are safe to eat.

    Led by ecologist Wieger Wamelink, the team tested radishes, tomatoes, rye, and peas. They looked at cadmium, lead, aluminium(铝), nickel(镍), copper, chrome(铬), iron, arsenic(砷), manganese(锰), and zinc(锌) contents in the plants, and didn't find any in dangerous levels. In fact, some of these vegetables have lower levels of heavy metals than those grown in regular potting soil. The plants were also tested for vitamins, alkaloids(生物碱), and flavonoids(类黄酮), with good results. While there are six more crops to test, Wamelink himself said that the results up to now are “very promising.”

    “Growing food locally is especially important to our mission of permanent settlement, as we have to ensure sustainable food production on Mars. The results of Dr. Wamelink and his team at Wageningen University & Research are significant progress towards that goal,” said Mars One co-founder and CEO Bas Lansdorp in a press release.

    A crowdfunding campaign is underway (and will be until the end of August) to fund the test of the remaining crops, potatoes included. If all the crops test out safe, with concentrations of heavy metal the FDA and the Dutch Food Agency consider as safe, Wamelink's team will host a “Martian dinner” at the Wageningen greenhouse. But I've seen the movie. Stay clear of the potatoes.

    As sea levels climb, even Washington, D. C. could see more frequent and widespread flooding at high tide.

    Strong storms and high winds sometimes bring floods to coastal areas. But cities and towns along the US East Coast are flooding even in calm and sunny weather. Among them is Maryland's capital Annapolis. Tourists there must sometimes walk through water flooding downtown streets surrounding the habor. Sometimes water covers roads in Atlantic City, N. J. Even the yards and basements of coastal homes near New York City sometimes flood.

All are suffering from this trend—normal high tides surpass (超过) a rising sea level.

    Sea levels have climbed, on average, about 20 centimeters (8 inches) over the past 135 years. And a sharp increase in tide flooding is one of the more visible impacts affecting many coastal areas, notes William Sweet, an oceanographer.

    Sweet and his co-workers recently analyzed data from 45 tide gauges (计量表) along the US coasts. These tools record the changing heights of tides as they rise and fall. From these data, Sweet's team calculated the number of : “troublesome floods” in various coastal cities. These floods, Sweet explains, typically occur when water level is about 30 centimeters (1foot) above the historic level of the highest tides. In June 2014, the team reported finding a growing rise in these flooding events.

    In Charleston, S.C. from 1957 to 1963, the city experienced troublesome floods an average of 4. 6 days per year. Bur from 2007 to 2013, the occurring rate of troublesome floods jumped five times. Annapolis city was even more serious. From1957 to 1963，troublesome floods were roughly 3. 8 days per year. From 2007 to 2013, the average was 10 times higher- 39. 3days a year.

    “Over the next few decades, climate change probably drives sea levels even higher,” Sweet says. “So today's flooding problems promise to become only more widespread and frequent.”

    The Independent Project at the Monument Mountain Regional High School in Great Barrington, Massachusetts, is attracting huge interest in the education field. The program is a new concept that has developed a wide variety of students' abilities and excited their interest in education and self-directed learning. They are a group of students that, instead of being educated through the normal school courses, have created their own subjects and project-based interactive learning.

    The students are almost completely independent. They choose a goal that they want to accomplish and work on for the whole year. These goals have included some impressive attempts such as writing a novel, writing a play, learning the piano and more. Along with these larger attempts, the students meet every day to ask questions about other subjects like natural sciences, social sciences, etc. Although most of them say that they don't like math, they did eventually develop an interest in math through this independent learning technique.

    The education program, which has attracted a huge variety of students, allows the students to learn and develop research skills and questioning techniques and allows them to truly be interested in the subjects they are diving into. They also teach each other what they have learned, which allows them to develop different way of presenting and gathering material that they have researched.

    I wish that I could have participated in such a project during my high school career, like writing a novel. I am currently studying English as well as education to pursue a teaching degree. I would love to adapt independent driven projects into a classroom in the future.

    This project also raises some crucial questions. Do we need to rethink the structure of the education system itself? Are too many students being simply fed through a conveyor belt(传送带) that we blindly see as working toward their education? I think that the education system needs some improvements, and different learning styles need to be addressed immediately.

    Individual differences in learning are huge keys to the functioning of a classroom. This project takes the idea to a whole new level. This is an extremely important event in the development of the American education system and I think everyone needs to keep an eye out for more programs like this.

    All people need to sleep. Sleep is a restorative(恢复健康的) process that promotes proper body functioning and can improve the quality of your life. Not only is the quantity of sleep important, but also the quality of sleep.

    Your bedroom should be shaped to your taste and allow you to sleep in a peaceful environment. One of the biggest mistakes people make in their sleep is to use the bedroom for activities other than sleep. If your bedroom also functions as a command station for your life and work, the possibility of your sleep being poor is rather high. Bedrooms should be designed, decorated and used for sleep only. TVs, computers and other things should not be in your bedroom if possible.

    Establishing regular sleeping and waking times can help improve the quality of your sleep especially for those suffering from sleeplessness. Avoid hot food, caffeine, sugar and alcohol at least 4 to 6 hours before you go to bed. Develop a regular exercise program. Proper exercise and nutrition will help improve sleep patterns. However, avoid exercising 2 hours before bed, since this may stimulate your body and make it more difficult to fall asleep.

    Establish a pre-bedtime rule that will help you focus on sleep. You can try meditation(沉思), reading or deep breathing and relaxation. Your bedtime rule should be yours. Do not worry about it fitting into a specific category. Do what is best for you.

    Things such as room temperature, noise and light levels and even your bed mattress(床垫) can have a lot of effect on the quality of sleep that you experience. Block out distracting noises and lights. You are in your bedroom to sleep and not be distracted by environmental interference(干扰).

    If you have a chance to go to Finland, you will probably be surprised to find how "foolish" the Finnish people are.

    Take the taxi drivers for example. Taxis in Finland are mostly high­class Benz with a fare of two US dollars a kilometer. You can go anywhere in one，tell the driver to drop you at any place，say that you have some business to attend to，and then walk off without paying your fare. The driver would not show the least signs of anxiety.

    The dining rooms in all big hotels not only serve their guests，but also serve outside diners. Hotel guests have their meals free, so they naturally go to the free dining rooms to have their meals. The most they would do to show their good faith is to wave their registration cards to the waiter. With such a loose check，you can easily use any old registration card to take a couple of friends to dine free of charge.

The Finnish workers are paid by the hour. They are very much on their own as soon as they have agreed with the boss at the rate. From then on they just say how many hours they have worked and they will be paid accordingly.

    With so many loopholes(漏洞) in everyday life, surely Finland must be a heaven to those who love to take "petty advantages". But the strange thing is that all the taxi passengers would always come back to pay their fares after they have attended to their business and that not a single outsider has ever been found in the free hotel dining rooms. And workers always give an honest account of the exact hours they put in. As the Finns always act on good faith in everything they do, living in such a society has turned everyone into a real “gentleman”.

    A company has just launched(发起) what it calls "the world's first free standardized English test" recently. Anyone can take the test for free. The new exam is called the EFSET, which is short for Education First Standardized English Test. The company, Education First, is known by the letters EF.

    It is reported that there are two billion English language learners worldwide. Many of them are interested in attending an American college or university. To do so, foreign students need to take the Test of English as a Foreign Language—better known as TOEFL. However, many foreigners are not rich enough to take the TOEFL. In addition, test-takers often have to travel overnight to reach an official testing site. The World Bank says an average Cambodian worker earns only about $1,000 per year. The cost of taking the TOEFL is about 17.5 percent of the average worker's yearly wage.

    It is not just individuals who find the test pricey. Some governments also find it too expensive. What's more, not everyone needs official results from the TOEFL or IELTS—the International English Language Testing System. In the future, it's likely that the government may use the EFSET to test millions of employees and students.

    Experts believe that the EFSET meets the highest value in language testing. It uses special computer software that makes the questions easier or harder, depending on one's performance. The EFSET measures all the English learners' levels while the IELTS and TOEFL only measure learners' levels from intermediate(中等的) to advanced. The EFSET is unique in the sense that it gives free online access to anyone interested in measuring their English level.

    There is a 50-minute and a two-hour version of the test, which its developers are calling the EFSET Plus. Both versions test only reading and listening skills. It's hopeful that speaking and writing skills will be tested in the future. The IELTS and the TOEFL still use humans to rate the speaking and writing sections. It's a huge deal for students who are in areas where they can't get to the TOEFL or the IELTS. However, it is too early to know whether the EFSET results are acceptable for colleges and universities in America.