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.

    Does your mood change with the seasons?

    Some people find that when the temperature goes down, so do their spirits.{#blank#}1{#/blank#}They eat more and gain weight. They have trouble sleeping. They can't think clearly. Here are some ways you can beat the winter blues：

    Get out in the sun. Some experts say that winter blues happen because we get less sunlight in the winter than we do in other seasons. Some say that the decrease in sunlight can make us feel sad{#blank#}2{#/blank#}

    Get some exercise. A walk or other exercise will make chemicals called endorphins (内啡肽）flow through your body. Endorphins are natural “feel good” chemicals.

    {#blank#}3{#/blank#} Avoid having too much sugar. If you crave sugary foods (like cookies or candy), it may be a sign that you need more protein (蛋白质), like meat, chicken, or fish.

    Avoid holiday stress. Cut back if you have too many things to do. Make sure you have some quiet time to yourself{#blank#}4{#/blank#} Get some rest. Studies show that most teens need about nine hours of sleep each night. The average teen, though, gets only about six or seven hours of sleep per night.

    Get help. Be cautious if you feel sad all the time and the feeling won't go away.{#blank#}5{#/blank#}Talk to an adult who you trust or get help from a doctor.

A. Eat more healthful foods.

B. Choose different foods in season.

C. Don't be so busy that you get run-down.

D. Those people sometimes feel sad for no reason.

E. You may have a bigger problem than the winter blues.

F. Getting extra sunlight each day can help brighten your mood.

G. A regular pattern of sleep is the most important thing to maintain.

    A British friend told me he couldn't understand why Chinese people love eating sunflower seeds as a snack so much. “I've met a lot of older Chinese and many have a crack in their front teeth; I believe that's from cracking the seeds, ” he said.

    I had never noticed the habit, but once he mentioned it, I suddenly became more aware. I realized that whenever I'm watching TV or typing a report, I always start mindlessly cracking sunflower seeds. My friend doesn't like sunflower seeds, and, to him, it seems unnecessary to work so much just to get one small seed.

    When we were young, the whole family would usually get together for Chinese New Year. Then, we all lived close to one another, usually in a small city, and sometimes even neighbors would go door-to-door on Chinese New Year's Eve to check out what every household was making.

    I remember my parents would be in the kitchen cooking. Out in the living room , a large table would already be laid out, complete with fancy tablecloth, ready-made dumpling fillings, and dishes full of candy, fruits and sunflower seeds. Some of the dishes were to be offered to our ancestors later, while others were for neighbors and children to eat before the evening feast. I must have learned how to crack sunflower seeds back then.

    I don't think it's right to criticize one's choice in food or eating habits, no matter how strange they may seem.

    It's not only in China. When I went abroad, I found people had all sorts of strange habits when it came to food. In Denmark, they put salted red fish on bread and eat it for dinner, no matter how much it ruins your breath. They think it's a delicacy, and it's connected to their culture. I think it's a wonderful tradition.

    Have you ever received a gift that was so clearly not your taste that you wondered if perhaps it had been handed to you by mistake? Worse, have you ever given a present and watched your friend look as though she had opened the wrong box? Maybe she responded with a polite "Why, thank you," but you knew you had missed the mark. Why do presents sometimes go wrong? And what do your choices (good and bad） reflect about your personal qualities?

    Choosing the right gift is an art, I believe. It calls for empathy — the ability to put yourself into someone else's head and heart .We're all able to do this; in fact, we're born with a kind of natural empathy. After the earliest period of childhood, however, it needs to be reinforced (加强）—by our parents, teachers, friends. When it isn't, we're not able to understand other people's feelings as sharply. This can show in the gifts we select, and so can many other emotional (情感的） qualities.

Think back to the presents you've given over the past year, the time and effort you put into your selection, how much you spent, your thoughts while you were shopping, and your feelings when the receiver opened the package. Keep in mind that what you choose displays your inner world. Of course, you may express yourself differently with different friends, relatives, and other people you know.

    We live in a society where exchanging presents is an important part of communication. Ignoring the tradition won't make it go away. If you really dislike such a tradition, tell your friends ahead of time.

    Garbage sorting has become a hot issue around China, especially after Shanghai began carrying out a regulation on July 1.

    Beijing, as a forerunner in environmental protection, has thus been expected to follow suit. The capital of the country has long been campaigning for sorting and recycling household waste, as part of its environmental drive for sustainable growth, local media reported.

    The current regulation gives garbage sorting responsibilities to government departments, property management groups and other organizations. It also gives rules for companies, outlining how they're responsible for waste collection, transportation and treatment. Only individuals are not subject to responsibilities.

    The long-awaited revision will soon change the situation, "Taking out the trash without sorting it properly will be illegal," said Sun Xinjun, director of the Beijing Commission of Urban Management. In Shanghai, violators are now fined up to 200 yuan ($30)for trash-sorting violations. The maximum fine in Beijing will not be less than that, he said.

    The Beijing city government first set out to promote garbage sorting in 2009. Authorities have since called on citizens to sort their household waste into four types-recyclable waste, kitchen trash, dangerous waste and others-and leave it in a corresponding dustbin or trash can. Blue-colored dustbins signify items within are recyclable, green represents kitchen trash, red corresponds to dangerous materials and grey to other waste.

    To promote the awareness of garbage sorting and expand the base of participants, authorities have employed workers to help residents on the spot. With intelligent devices, those who throw in recyclable waste at given sites will be rewarded with bonus points, which can be used to buy daily goods. At some communities, there are no color-coded dustbins. Instead, a scheduled garbage collection service is offered to help improve the environment. In other communities, workers offer a door-to-door service to collect recyclables or kitchen waste.

    Beijing Environmental Sanitation Engineering Group has been promoting new garbage sorting facilities such as recycling cabinets and smart kitchen waste trash cans since 2016, Xinhua News Agency reported. Nearly 26,000 metric tons of household waste is generated across Beijing on a daily basis and 29 terminal garbage disposal facilities are working at full capacity. Nearly 9.3 million tons of household waste was processed in the city last year.

Based on his own research at Washington University in St. Louis and other scientific studies, psychology lecturer Bon o offers the following tips for getting and staying happier in your life.

{#blank#}1{#/blank#} Looking forward to an enjoyable experience can make it all that much sweeter. Wait a couple of days before seeing a new movie that just came out, plan your big vacation for later in the summer, and try to take time to enjoy each bit e of dessert. On the opposite, get negative tasks out of the way as quickly as possible —any delay will only make them seem worse.

People who focus more on process than outcome tend to remain motivated in the face of setbacks. They're better at sticking with major challenges and prefer them over the easy route. {#blank#}2{#/blank#} Because it celebrates rewards that come from the work itself. Focusing only on the outcome can lead to premature burnout if things don't go well.

{#blank#}3{#/blank#} Find an activity that allows you to get together with friends on a regular, ongoing basis. A weekly happy hour, poker night, or TV show ensures consistency and motivation in your social interactions. People with high-quality relationships are not only happier, but also healthier. {#blank#}4{#/blank#}.

The next time you are attracted to use your phone to look through social media, look through your list of contacts instead. {#blank#}5{#/blank#} The happiness you get from a real connection with another person will be far greater than any comments or likes you get on social media.

A. Anticipation itself is pleasurable.

B. Decrease unnecessary socializing.

C. Find someone to call or Face Time.

D. This "growth mindset" helps people stay energized.

E. Facebook and Instagram often overstate how much better off others are.

F. Nothing is more important for our psychological health than high-quality friendships.

G. They recover from illnesses more quickly, live longer, and enjoy more enriched lives.