So you want to be a citizen scientist? The National Science Foundation (NSF) has got you covered. NSF supports citizen science across all areas of science, whether your passion is to scan the night sky, or explore your own backyard.

Join a flock of birders

    eBird is an online platform that allows bird-watchers to go online and record their sightings to a database. With more than 100,000 active users, eBird's system is a treasure of information on bird population, distribution and habitat, which users can explore in real time.

Count every drop

    The Community Collaborative Rain, Hail and Snow Network (CoCoRaHS) is the largest provider of daily precipitation observations in the United States. Volunteers set up rain gauges and record data every time a rain, snow or hail storm passes over. Data is organized and shared on the CoCoRaHS website, and used by scientists, farmers and more.

Search for stars with your computer

    Einstein@Home uses your computer's idle time to search for space signals. The project has already had major successes: Volunteers discovered about 50 stars, using data from Puerto Rico's Arecibo Observatory and Australia's Parkes Observatory. Einstein@Home also searches for gravitational-wave signals using data from NSF's Laser Interferometer Gravitational Wave Observatory.

Be part of a supercomputer

    To link all those home computers, Einstien@Home uses software called the Berkeley Open Infrastructure for Network Computing, better known as BOINC. The software choreographs(安排，筹划) the technical aspect of volunteer computing and helps you use radio telescope signals to search for alien life.

Join the plankton party

    Without plankton, life in the ocean would not exist. These tiny organisms form the base of the food chain, and play an important role in the global carbon cycle. Plankton Portal enlists citizen scientists to identify images of plankton, snapped by the In Situ Icthyoplankton Imaging System (ISIIS), an underwater robot engineered at the University of Miami. ISIIS has taken millions of images in oceans around the world and upload them into a database; classifying the images helps researchers understand plankton diversity, habitat and behavior.

    Optimism May Help People Live Longer

People who have an optimistic view on life are more likely to live longer, a US study said Wednesday.

    The study, published in the American Journal of Epidemiology, analyzed data from 2004 to 2012 from 70,000 women enrolled in the Nurses' Health Study, a long-running US study tracking women's health via surveys every two years.

    The researchers looked at participants' levels of optimism and other factors that might play a role in how optimism may affect mortality risk, such as race, high blood pressure, diet, and physical activity.

    It found the most optimistic women, or the top 25%, had a nearly 30 percent lower risk of dying from any of the diseases analyzed in the study compared with the least optimistic women, or the bottom 25%.

    The most optimistic women had a 16 percent lower risk of dying from cancer; 38 percent lower risk of dying from heart disease; 39 percent lower risk of dying from stroke; 38 percent lower risk of dying from respiratory disease; and 52 percent lower risk of dying from infection.

    Previous studies have linked optimism with reduced risk of early death from cardiovascular (心脑血管的) problems, but this was the first to find a link between optimism and reduced risk from other major causes.

    “While most medical and public health efforts today focus on reducing risk factors for diseases, evidence has been mounting that enhancing psychological resilience (弹性，复原力) may also make a difference,” said Eric Kim, research fellow at the Harvard T.H. Chan School of Public Health and co-lead author of the study.

    “Our new findings suggest that we should make efforts to boost optimism, which has been shown to be associated with healthier behaviors and healthier ways of coping with life challenges.”

    The study also found that healthy behaviors only partially explain the link between optimism and reduced mortality risk. One other possibility is that higher optimism directly affects our biological systems, Kim said.

    Co-lead author and postdoctoral research fellow Kaitlin Hagan said optimism can be varied with relatively uncomplicated and low-cost interventions (干预), even things as simple as having people write down and think about the best possible outcomes for various areas of their lives, such as careers or friendships.

    “Encouraging use of these interventions could be an innovative way to enhance health in the future,” Hagan said.

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    For an increasing number of students at American universities, Old is suddenly in. The reason is obvious: the graying of America means jobs, coupled with the aging of the baby-boom generation, a longer life span means that the nation's elderly population is bound to expand significantly over the next 50 years. By 2050, 25 percent of all Americans will be older than 65, up from 14 percent in 1995.The change poses profound questions for government and society, of course. But it also creates career opportunities in medicine and health professions and in law and business as well. “In addition to the doctors, we're going to need more sociologists, biologists, urban planners and specialized lawyers,” says Professor Edward Schneider of the University of Southern California's (USC) School of Gerontology（老年学）.

    Lawyers can specialize in “elder law”, which covers everything from trusts and estates to nursing-home abuse and age discrimination. Businessmen see huge opportunities in the elder market because the baby boomers, 74 million strong, are likely to be the wealthiest group of retirees in human history. “Any student who combines an expert knowledge in gerontology with, say, an MBA or law degree will have a license to print money,” one professor says.

    Margarite Santos is a 21-year-old senior at USC. She began college as a biology major but found she was “really bored with bacteria.” So she took a class in gerontology and discovered that she liked it. She says, “I did volunteer work in retirement homes and it was very satisfying.”

    Why should mankind explore space? Why should money, time and effort be spent exploring and researching something with so few apparent benefits? Why should resources be spent on space rather than on conditions and people on Earth? These are questions that, understandably, are very often asked.

    Perhaps the best answer lies in our genetic makeup as human beings. What drove our ancestors to move from the trees into the plains, and on into all possible areas and environments? The wider the spread of a species, the better its chance of survival. Perhaps the best reason for exploring space is this genetic tendency to expand wherever possible.

    Nearly every successful civilization has explored, because by doing so, any dangers in surrounding areas can be identified and prepared for. Without knowledge, we may be completely destroyed by the danger. With knowledge, we can lessen its effects.

    Exploration also allows minerals and other potential resources to be found. Even if we have no immediate need of them, they will perhaps be useful later. Resources may be more than physical possessions. Knowledge or techniques have been acquired through exploration. The techniques may have medical applications which can improve the length or quality of our lives. We have already benefited from other spin-offs including improvements in earthquake prediction, in satellites for weather forecasting and in communications systems. Even non-stick pans and mirrored sunglasses are by products(副产品) of technological developments in the space industry!

    While many resources are spent on what seems a small return, the exploration of space allows creative, brave and intelligent members of our species to focus on what may serve to save us. While space may hold many wonders and explanations of how the universe was formed or how it works, it also holds dangers. The danger exists, but knowledge can help human beings to survive. Without the ability to reach out across space, the chance to save ourselves might not exist.

    While Earth is the only planet known to support life, surely the adaptive ability of humans would allow us to live on other planets. It is true that the lifestyle would be different, but human life and cultures have adapted in the past and surely could in the future.

    Idioms are one of the hardest parts of learning a language. For those of you who don't know, an idiom is a phrase which has a meaning, but the meaning is not clear from the words themselves. If you translate an idiom word for word, it sometimes makes no sense at all. They are like puzzles and even native speakers can get confused when someone uses a phrase that they've never heard of.

With that in mind, here are five common English idioms that you can use in a variety of Situations.

⒈Get your act together (Meaning: you need to improve your behaviour/work)

    This might be something your teacher says to you if you score badly in an exam or if you misbehave in class. You can also use it to talk about people in general. For example, if your friend is being mean or nasty for no reason, then you can tell them that they need to get their act together.

⒉Pull yourself together (Meaning: calm down)

    This is a somewhat impolite way of telling someone that they are overreacting and that they need to relax. Only use this if you think the person you are speaking to is getting upset over something insignificant. If your friend tells you that their close relative has died, it is NOT the time to tell them to pull themselves together.

⒊I'm feeling under the weather (Meaning: I'm sick)

    Yes, it's longer and more difficult to say than 'I'm sick', but if your English teacher asks you why you haven't done your homework, he or she is more likely to forgive you if you say that you were feeling under the weather. You may not have done your English homework, but your teacher might be impressed that you know how to make eloquent excuses in a foreign language.

⒋It's a piece of cake (Meaning: it's easy)

    I don't know why this means what it does, but sometimes you just have to accept that English people use weird phrases.

⒌Break a leg (Meaning: good luck!)

    This is perhaps one of the most confusing yet well-known English idioms. If someone says this to you, do not take offence or think they are threatening you; they are just wishing you luck. It is most often used for people wishing success to actors and actresses before they perform on the stage, but it can be said in other situations, too.

    All in all, learning a new language can be challenging. It's definitely not a piece of cake, especially when there are so many confusing idioms. However, with enough hard work and interest, you will succeed in no time. Break a leg!