Breakthroughs in science and technology are paving the way for modern cities to support bigger populations. Now, we see the most exciting urban innovations to show you exactly how they'll improve your city's infrastructure(基础设施).

Lighting Up The Night

    Anthony Di Mari dreamed up an electric tree to help irrigate public parks and light them at night. These electric trees contain a special infill (填充物) that collects water from rainfall. The water is then distributed through a shallow underground irrigation system with the help from the trees' swaying movement. An electric motor turns energy from the waving of the artificial trees into electricity, which is used to light up the trees' outer LEDs.

Thinking Outside The Box

    As more people flock to urban areas, city planners will need to get increasingly creative about how to satisfy residents' health and transportation needs within decreasing available space. One way to achieve this is by updating infrastructure to support biking and walking by building suspended(悬浮的) roundabouts like hovering in the Netherlands. By lifting bicycle and pedestrian traffic above busy roadways, cities can significantly decrease over-crowded traffic condition.

Waving Hello To Clean Energy

    Cities that don't receive enough sunlight may find an attractive alternative in wave power. Since ocean waves rarely experience disruption(中断), electric engines driven by their clockwork push-and-pull can reliably provide power throughout the year. Further, thanks to advances in wave power technology, engineers have been able to move wave power engines farther offshore, where the waves pack the most punch, making the engines extremely efficient. So in the future, heavily populated coastal cities may use wave to meet their energy needs.

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    A new study suggests a simple getting-to-know-you exercise might improve classroom relationships. The teacher-student relationship affects every aspect of the educational experience. When students don't feel safe and respected by their teacher, they are less likely to devote themselves to their education. And when teacher feel distanced from their students, it is nearly impossible to walk into the classroom each day actively, let alone encourage motivation or investment in students.

    Hunter Gehlbach, a professor, explained that his research is primarily concerned with social perspectivetaking(换位思考), or the ability to understand what drives the people around us. As he explained, "My focus is classrooms and social perspective-taking--figuring out the thoughts and feelings of others seems important. We want teachers to be able to engage in this process and figure out the thought process of students as much as possible, in order to understand where and why they are making mistakes."

    Gehlbach and his colleagues gave 315 students and 25 teachers a "getting-to-know-you" survey of 30 items at the beginning of a school year. The researchers matched similarities between the teacher and the student, and then showed those similarities to the teachers and students. Five weeks later, the researchers returned to start a more indepth survey of both students and teachers, and to measure their opinions of their relationships and the classroom experience as a whole. The second survey showed that when teachers and students know they have five things in common, relationships and educational outcomes both improve.

    Gehlbach explained that the similarities he and his colleagues established were not based on personal information, but on shared preferences. Gehlbach explained: one of the biggest surprises in reading the similarity research was how little some of the similarities were that caused positive feelings towards others.

    Though Gehlbach's study has limitations, he is encouraged by the results and eager to explore the phenomenon further.

    Franz Boas was born in Minden, Germany, in 1858. After studying at the Universities of Heidelberg, Bonn, and Kiel, he received a doctor's degree in physics from the University of Kiel in 1881. His first fieldwork experience was among the Eskimo in Baffinland, Canada, in 1883-1884. In 1886, on his way back from a visit to the Kwakiutl Indians of British Columbia, Canada, he stopped in New York and decided to settle.

    Boas's first teaching position in America was at the newly founded Clark University in 1888. Eleven years later, he became professor of anthropology(人类学) at Columbia University. From 1896 to 1905 he was also curator(馆长) of anthropology at the American Museum of Natural History in NY. There he organized and took part in the Jesup North Pacific Expedition of 1902, which suggested the possibility of a strong relationship between northern Asian and northwestern Native American cultures. After guiding the Columbia Anthropology Department for 41 years, Boas became Professor Emeritus(荣誉退休教授) in 1937.

    Boas's anthropological studies have become classics in the field. He showed the necessity of studying a culture in all its aspects, including art, history, dance, language as well as the characteristics of the people. He pointed out that the differences in peoples were the results of historical, social and geographic conditions and all populations had complete and equally developed culture. He argued that no truly pure race exists, and that no race is superior to any other.

    In 1911 Boas published the Mind of Primitive Man, a series of lectures on culture and race. In the 1930s the Nazis in Germany burned the book. Boas revised the book in 1937 and put his anthropological ideas about racism into popular magazine articles. In 1942, Boas died, having founded anthropology as a recognized social science.

    When my father married my mother in 1943, he gave my mother a 1937 crown coin and told her to keep it in the back of her purse and not to spend it. This would mean that she always felt that she was protected and would always have money if she really needed it.

    When I was married in 1970 my husband who had heard this story, obtained a 1937 crown coin for me and I have always kept it in my wallet, and I have always had enough for my needs.

    A friend recently fell on hard times, partly through external (外部的) circumstances and partly through poor planning. Friends and I have loaned her money, paid her bills, given her food, and even tried to teach her budget techniques, but none of them has been a solution. She has just slipped deeper and deeper into financial trouble and depression.

    Last week she looked pale and unwell, very depressed and hopeless, very sad for a friend to see and I then thought about how the crown coin, a physical reminder of another's care and love had protected me, so I went to the bank for a $ 100 dollar-bill.

    I told my friend the story and asked her to keep the $ 100 in the back of her wallet. It turned out that she didn't have a wallet, so she put the money in a little pencil case where she kept her coins. She immediately felt better—"I feel rich, and thank you for being a good friend," she said, and we were both a bit teary.

    I went home and remembered a little wallet I had that I'd never used, and thought, "I'll give that to my friend." I opened it, and inside, found $ 100.

Though known for being violent, six-foot-long Humboldt squid (鱿鱼) in the Pacific Ocean, are good communicators,

It is not news that the squid can rapidly change the color of their skin-making different patterns for communication something other squid species are also known to do.

Bot it is totally dark where the Humboldt squid live, more than one thousand feet below the ocean surface. So their pattern is invisible. Instead, a new study suggests that they create backlighting for the patterns by making their bodies glow, like the screen of an ereader.

"Right now, what blows my mind in there's probably squid talking to each other in the deep ocean and they're probably sharing all sorts of cool information." said Ben Burford, a graduate student at Stanford University.

Burford and his fallow researchers studied deep-water recordings made by remotely operated vehicles off the California coast. They found the squid make around 30 different patterns, some of which are only used around other squid, suggesting they're used for communication, The squid also appear to reorder the patterns, almost like words in a sentence.

"That's really exciting because then you can say a whole lot more based on their arrangement," Burford said. "So, they could for instance say, hey, that fish over there is mine, and I'm the ruling squid."

The findings could change the way scientists think about bioluminescence (生物荧光), which is used by many deep-sea animals to attract prey or a mate.

"We generally think of deep: sea stuff as having very simple displays because it's a low-light environment," said Mike Vecchione, a zoologist from the National Museum of Natural Museum of Natural History. "This turns some of our ideas about bioluminescence almost around upside down."

The deep ocean is a challenging place to study, so Vecchione said there may be much more complexity to discover.