1 . The United States rose to global power on the strength of its technology, and the lifeblood that technology has long been electricity. By providing long-distance communication and energy, electricity created the modern world. Yet properly understood, the age of electricity is merely the second stage in the age of steam, which began a century earlier.

"It is curious that no one has put together a history of both the steam and electric revolutions." writes Maury Klein in his book The Power Makers, Steam, Electricity, and the Men Invented Modern America. Klein, a noted historian of technology, spins a narrative so lively that at times it reads like a novel.

The story begins in the last years of the 18th century in Scotland, where Watt perfected "the machine that changed the world". Klein writes, "America did not invent the steam engine, but once they grasped its passwords they put it to more uses than anyone else. "

Meanwhile, over the course of 19th century, electricity went from mere curiosity to a basic necessity. Morse invented a code for sending messages over an electromagnetic circuit. Bell then gave the telegraph a voice. Edison perfected an incandescent bulls that brought electric light into the American home.

Most importantly, Edison realized that success depended on mass electrification, which he showed in New York City. With help from Tesla, Westinghouse's firm developed a system using alternating current, which soon became the major forms of power delivery.

To frame his story, Klein creates the character of Ned, a fictional witness to the progress brought about by the steams and electric revolutions in America during one man's lifetime. It's a technique that helps turn a long narrative into an interesting one.

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5 . Bookstores are fascinating places. That’s because the books on the shelves can take you away to magical lands, help you learn a foreign language, or cook a delicious meal. But when your community is too small to house a real brick bookstore, sometimes you have to make a compromise. A mobile bookstore that brings books around the country was the result. That is the case for Rita Collins, 70, who dreamed of opening a used bookstore after retiring from teaching.

A business planning class from the American Booksellers Association convinced Collins to abandon her idea that opening a bookstore in the small town where she lives, which would not be sustainable. Eureka, Montana, located just seven miles from the Canadian border, only has a population of 1,517. Collins asked her instructors about a traveling bookstore on wheels and they were skeptical. But she persevered.

Collins was inspired by Dylans Mobile Bookstore, a traveling bookstore in Wales run by Jeff Towns. She contacted Jeff for advice but she was largely on her own when it came to building her bookstore. First, she had to find a vehicle large enough to stand in. Then she had to have it refitted with shelves that would hold the books at a 15-degree angle so that they would stay in place while in transit. Collins named her bookstore St Rita’s Traveling Bookstore, which has been on the road since 2015.

At first, she drove through Montana and then she made her first cross-country trip in 2016. After she retired in 2017, it became a full-time job all year round. Collins and her mobile bookstore have visited 30 states, stopping at festivals and events along the way. While the locations change, some things always stay the same. Collins loves meeting people and making connections. While she loves what she does, Collins doesn’t think she can keep doing it. In several years, she hopes to pass her traveling bookstore onto another bibliophile who shares the same interest and will keep it on the road.

7 . Now, an increasing number of cities are suspending recycling services, partly out of fear that workers might contact the coronavirus from one another while sorting through used water bottles, food containers and boxes. One solution: Let robots do the job.

Since the coronavirus took hold in the United States last month, AMP Robotics has seen a “significant” increase in orders for its robots that use artificial intelligence to sort through recycled material, and weed out trash. Some facilities that were looking at getting one or two robots are now saying, “We need quite a bit more.” The Colorado company’s chief executive, Matanya Horowitz said, “It’s all moving quite fast.”

Before the pandemic, automation had been gradually replacing human work in a range of jobs, from call centers to warehouses and grocery stores, as companies looked to cut labor costs and improve profit.

But labor and robotics experts say social-distancing directives, which are likely to continue in some form after the crisis become less strong, could cause more industries to accelerate their use of automation. And long-lasting worries about job losses or a broad unease about having machines control vital aspects of daily life could disappear as society sees the benefits of restructuring workplaces in ways that minimize close human contact.

Recycling is one industry that may be altered permanently by the pandemic. Some workers, who earn as little as $10 an hour, have been concerned about coming to work during the crisis and some cities have been competing to find enough protective gear (防护装备) for all of their employees. Federal health officials have assured them that the risks of transmission from household refuse is low. But workers in recycling facilities often work side by side sorting material, making social distancing difficult.

At AMP Robotics, executives like Mr. Horowitz say their robots will enable recycling facilities to space out their employees, who stand at conveyor belts weeding through the used plastic and paper.

8 . Popularity is a well-explored subject in social psychology. Mitch Prinstein, a professor of clinical psychology sorts the popular into two categories: the likable and the status seekers. The likables’ plays-well-with-others qualities strengthen schoolyard friendships, jump-start interpersonal skills and, when tapped early, are employed ever after in life and work. Then there’s the kind of popularity that appears in adolescence: status born of power and even dishonorable behavior.

9 . Returning to a book you’ve read many times can feel like drinks with an old friend. There’s a welcome familiarity — but also sometimes a slight suspicion that time has changed you both, and thus the relationship. But books don’t change, people do. And that’s what makes the act of rereading so rich and transformative.

The beauty of rereading lies in the idea that our bond with the work is based on our present mental register. It’s true, the older I get, the more I feel time has wings. But with reading, it’s all about the present. It’s about the now and what one contributes to the now, because reading is a give and take between author and reader. Each has to pull their own weight.