2 . This question has fascinated behavioural scientists for decades: why do we give money to charity?

The explanations for charitable giving fall into three broad categories, from the purely altruisic (利他的)— I donate because I value the social good done by the charity. The “impurely” altruistic— I donate because I extract value from knowing I contribute to the social good for the charity. And the not-at-all altruistic— I donate because I want to show off to potential mates how rich I am.

But are these motives strong enough to enable people to donate as much as they would want to? Most people support charities in one way or another, but often we struggle to make donations as often as we think we should. Although many people would like to leave a gift to charity in their will, they forget about it when the time comes.

Many people are also aware that they should donate to the causes that have the highest impact, but facts and figures are less attractive than narratives. In a series of experiments, it was found that people are much more responsive to charitable pleas that feature a single, identifiable beneficiary(受益者), than they are to statistical information about the scale of the problem being faced. When it comes to charitable giving, we are often ruled by our hearts and not our heads.

The good news is that charitable giving is contagious—seeing others give makes an individual more likely to give and gentle encouragement from an important person in your life can also make a big difference to your donation decisions— more than quadrupling them in our recent study. Habit also plays a part— in three recent experiments those who volunteered before were more likely to do donate their time than those who had not volunteered before.

In summary, behavioural science identifies a range of factors that influence our donations, and can help us to keep giving in the longer term. This is great news not just for charities, but also for donors.

3 . In today’s digital era, social media users are increasingly coming across fake news online. This leads to the pressing issue: What causes people to fall for misinformation on the Internet?

According to researchers at the Penn State College of Information Sciences and Technology,   users can easily fall into an echo chamber (回声室)—a sort of virtual space where users consume only one-sided news, eventually distrusting any opposing views. “We all tend to agree with the group opinion. Hence, people naturally get together with others who hold the same opinion,” said Dongwon Lee, one of the researchers. “But if you’re not cautious, there is a high risk of falling into an echo chamber.”

To prevent this phenomenon, the researchers have crafted a novel tool, a game named ChamberBreaker, to help players resist echo chambers and reduce the rate of fake news spread. The fundamental approach employed by ChamberBreaker centers around a decision-making procedure that mirrors the creation of echo chambers. In ChamberBreaker, a player is tasked with trying to have community members fall into an echo chamber. To begin, the player is randomly assigned a situation that focuses on a health, political or environmental issue, and is presented with six pieces of news on that topic. Then, the player selects news that could cause the other members to fall into an echo chamber while at the same time maintaining their trust. If successful, the community members will fall into an echo chamber and the player will witness the resulting negative effects on the community.

After developing ChamberBreaker, researchers tested it with over 800 subjects to see if it raised awareness of echo chambers and changed news consumption behaviors. The researchers found that those who played ChamberBreaker were significantly more likely to state their intention to observe online information from more diverse perspectives and showed an increased awareness of the echo chamber phenomenon.

Ultimately, the researchers hope that their methodology can excite a greater interest in the scientific and scholarly study related to information consumption. The application of tools like ChamberBreaker, which focuses on fostering analytical reasoning, may lead us towards a more informed online community.

5 . Have you ever wondered what happens to your mobile phones and laptops after you throw them out to make way for a newer model? According to its latest Global E-Waste Monitor, India is the third top producer of e-waste in the world. E-waste in Indian landfill goes on to pollute soil and groundwater, affecting food supply systems and water sources.

Thankfully, the country has a new group of artists who are changing these thrown mechanical items-from mobile phones to old televisions- into large murals (壁画) and artworks to creatively show their concern for the waste problem.

Over the past quarter of a century, Mumbai’s Haribaabu Naatesan has transformed hundreds of tonnes of e-waste into art, integrating elements from nature and industry. “I get my waste material from friends, relatives and neighbours who know my interest in e-art and send me bags of thrown electronic appliances,” says Naatesan. Over his career, he has created huge murals for several companies. He has also showed his work at the India Art Fair, as well as several other national displays.

Another artist Vishwanath Davangere has also long worked with e-waste. He likes to take apart old laptops and reassemble (重新组装) them into birds, animals and plants. After retirement, he started pursuing this hobby more seriously and started selling his creations across the world. His most outstanding works include a robotic Egyptian statue with glowing red eyes and a Milky Way made from keyboard keys. He hopes to enable others to reconsider their own consumption habits and make more environmentally conscious choices.

“By giving e-waste a second chance, I aim to raise awareness about the environmental impact of electronic waste.” says Davangare, who today has a collection of more than 600 eco-art objects.

7 . Many people are aware of the beauty of a solar eclipse (日食), but are surprised to learn that lunar eclipses are often just as impressive. While a total solar eclipse lasts only for a few minutes and can be seen only in a small area of a few square kilometres, a total lunar eclipse can last for several hours and can be seen over much of the planet. Therefore, the beauty and stability of lunar eclipses make them a favourite of both amateur and professional photographers.

Lunar eclipses generally occur two or three times a year, and are possible only when the Moon is full. When we see the Moon, we are actually seeing sunlight reflect off the surface of the Moon. When the Earth passes between the Moon and the Sun, however, the Earth’s shadow falls on the Moon, and a lunar eclipse occurs.

The type of lunar eclipses—total, partial, or penumbral (半影的)—that occurs depends on both how much of the Moon passes through the Earth’s shadow and through which part of the shadow it passes. A penumbral eclipse occurs when the Moon passes through the Earth’s outer shadow. This type of eclipse is brief and frequently goes unobserved by anyone but astronomers. By contrast, total and partial eclipses occur when all or part, respectively, of the Moon passes through the umbra (本影) of the Earth. These eclipses are quite easy to see and are widely observed.

Unlike solar eclipses, lunar eclipses are safe to watch. Solar radiation that occurs during an eclipse of the sun can cause a form of burns of one’s eyes know as eclipse blindness. In fact, the only way to safely view a solar eclipse is using specially designed equipment. However, since the Moon’s light is reflected sunlight, it is completely safe to watch a lunar eclipse without any special equipment, although a pair of binoculars (双筒望远镜) can certainly help the viewer appreciate the beauty of this phenomenon.

8 . Reading poems is not exactly an everyday activity for most people. In fact, many people never read a poem once they get out of high school.

It is worth reminding ourselves that this has not always been the case in America. In the nineteenth century, a usual American activity was to sit around the fireside in the evening and read poems aloud. It is true that there was no television at that time, nor movie theatres, nor World Wide Web, to provide diversion. However, poems were a source of pleasure, of self-education, of connection to other people or to the world beyond one’s own community. Reading them was a social act as well as an individual one, and perhaps even more social than individual. Writing poems to share with friends and relations was, like reading poems by the fireside, another way in which poetry has a place in everyday life.

How did things change? Why are most Americans no longer comfortable with poetry, and why do most people today think that a poem has nothing to tell them and that they can do well without poems?

There are, I believe, three factors: poets, teachers, and we ourselves. Of these, the least important is the third: the world surrounding the poem has betrayed us more than we have betrayed the poem. Early in the twentieth century, poetry in English headed into directions unfavourable to the reading of poetry. Readers decided that poems were not for the fireside or the easy chair at night, and that they belonged where other difficult-to-read things belonged.

Poets failed the reader, so did teachers. They want their students to know something about the skills of a poem; they want their students to see that poems mean something. Yet what usually occurs when teachers push these concerns on their high school students is that young people decide poems are unpleasant crossword puzzles.

10 . Where can you find the first successful airplane, one of the world’s biggest bugs (虫子) and Kermit the Frog? They’re all at the Smithsonian Institution, Americans’ storehouse of the coolest things ever, in Washington，D.C.More than 138 million objects have been collected by their 19 museums, with more coming in every day.

The Smithsonian was founded in 1846 and named after James Smithson, an English businessman. Smithson never visited America, but he left his entire fortune to the United States to build an institution “for the increase of knowledge”.

Here are just a few of the amazing things in the Smithsonian collection.

Big bugs

The Smithsonian has 35 million bugs. The largest insect in the collection is a beetle (甲虫) from South America called the titan beetle. Titan beetles can grow to more than 6 inches long.

Flying machines

The first powered plane to fly, the 1903 Wright Flyer, is displayed in the National Air and Space Museum. The Smithsonian has the first supersonic (超声速的) airliner, the Concorde, which could cross the Atlantic Ocean in fewer than four hours.

The longest beard

The Smithsonian is home to the longest beard ever recorded. Norwegian immigrant Hans Langseth had grown his facial hair to 18 feet 6 inches by the time he died in 1927. The Smithsonian has 17 feet 6 inches of it because, even though Langseth’s final wish was to have his entire beard preserved, his family decided it wouldn’t be right to bury him clean­shaven.

Time and admission：

Smithsonian museums are open every day of the year except December 25 unless otherwise noted. Most museums are open daily from 10 a. m. to 5：30 p. m. The American Art Museum and Portrait Gallery are open 11：30 a. m. to 7 p. m.

Admission is free for all Smithsonian museums and the zoo in Washington，D.C., and the American Indian Museum’s George Gustav Heye Center in New York. A fee is required at the Cooper­Hewitt, National Design Museum in New York (Members and children under 12 are admitted free).