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With the completion of the Human Genome（基因组）Project more than 20 years ago, and the discovery of the double helix structure of DNA enjoying its 70th birthday last year, you might assume that we know how life works. Think again!

Evolution has a 4bn-year head start on us. However, several aspects of the standard picture of how life works-the idea of the genome as a blueprint, of genes as instructions for building an organism, of proteins as precisely tailored molecular（分子）machines and more-have wildly reduced the complexity of life. 

In the excellent book How Life Works, Philip Ball explorers the new biology, revealing life to be a far richer, more delicate affair than we have understood. Ball explains that life is a system of many levels-genes, proteins, cells, tissues, and body modules-each with its own rules and principles, so there is no unique place to look for an answer to it. 

Also, How Life Works is a much more appealing title than the overused question of "What is life?". We should be less concerned with what a thing is, and rather more focused on what a thing does. Defining a living thing implies an unchangeable ideal type, but this will run counter to the Darwinian principle that living things are four-dimensional, ever changing in time as well as space.

But it's an idea that is deeply rooted within our culture. Ball points out that we rely on metaphors（比喻）to explain and explore the complexities of life, but none suffice. We are taught that cells are machines, though no machine we have invented behaves like the simplest cell; that DNA is a code or a blueprint, though it is neither; that the brain is a computer, though no computer behaves like a brain at all.

Ball is a terrific writer, pumping out books on incredibly diverse subjects. There's a wealth of well-researched information in here, and some details that are a bit chewy for the lay reader. But the book serves as an essential introduction on our never-ending quest to understand life.

Lily loved school. However, there was one class Lily worried about more than any other—art. She didn't know why she just wasn't any good at drawing, painting, or cutting.

Ms. Clay, the art teacher, stood at the front of the room. "Class, next Friday our school is going to have an art competition," she announced. Ms. Clay was a great teacher, and Lily liked her a lot. But this announcement made Lily nervous. "Everyone in the school will create a piece of artwork to show in the library. You can use the different types of artwork we have been studying." Ms. Clay was quite excited when she spoke while Lily found herself sinking lower in her chair.

Lily had the whole weekend to work on her project, but she could not think of anything to do. On Monday, Lily felt frightened, so after school Lily asked Ms. Clay if she could write an art paper instead of doing an art project.

"I understand this project scared you, Lily," Ms. Clay said. "Just remember, you can create any kind of art you want." Ms. Clay smiled at her. "Art is a person's way of expressing his or her feelings—it isn't always painting, drawing, or cutting. I know you will think of something very creative, and I can't wait to see it."

When Lily arrived home, she took out a piece of paper and a pencil. She remembered Ms. Clay's words. "Art is a person's way of expressing his or her feelings." Lily wrote the word "terrified" on her paper. She crumpled (揉皱) the paper and threw it to the side of her desk.

Then Lily stared at the crumpled ball. Suddenly an idea struck her.

Paragraph 1：

Why not create something out of crumpled paper?

Paragraph 2：

On Friday, Lily carefully carried her project into the library.

The popularity of ancient towns in the south of the Yangtze River, such as Zhouzhuang and Wuzhen, has aroused a nationwide trend in the construction of ancient towns. Lin Peng, the director of China's Institute of Ancient Cities and Cultural Studies, pointed {#blank#}1{#/blank#} that there are more than 2,800 developed or developing ancient towns in our country, {#blank#}2{#/blank#} is definitely the highest number globally.

In ancient towns, {#blank#}3{#/blank#} immersive（沉浸式） experience being mentioned here is historical and cultural characteristics—the "ancient" of ancient towns. Apart from visible "special buildings", characteristics also include invisible "culture". Tourists in ancient towns want to see the living {#blank#}4{#/blank#} （condition） of local people, feel the vitality of town life, try characteristic local snacks {#blank#}5{#/blank#} （influence） by geography and folk customs, and understand how long history {#blank#}6{#/blank#} （shape） local culture. Out of modern fast-paced work and life, tourists want to awaken their inner softness with a slow-moving ancient town.

Touring ancient towns is for recreation, relaxation, and pleasure, {#blank#}7{#/blank#} if all the ancient towns in different places are the same and cannot find their own {#blank#}8{#/blank#} （unique）, then ancient town tourism will {#blank#}9{#/blank#} （eventual） decline. Let every ancient town become a unique historical imprint（印记）, so that tourists can find their "poetry and distance" while {#blank#}10{#/blank#} （wander） through the ancient towns. This is the soul that ancient towns need to regain.

Rebecka Peterson, a high school math teacher, is the nation's 2023 Teacher of the Year. Her first year of teaching wasn't without its 1 ，but she remembered why she was there and wanted to bear those2 thoughts in mind. So she 3 the One Good Thing blog.

It was 4 and fun, really. Every evening, she would write on her blog, 5 "one good thing she experienced that day. She gave her blog the tagline; "Every day may not be good, but there is on good thing in every day."

She encouraged her 6 to do the same in their handwritten journals. Just a few minutes a day to7 something good that happened—that would be enough, she 8 . She believes that it will make them happier and more 9 to learn.

During her eleven years in teaching, Peterson has10 that some students find math difficult. But her efforts to make it 11 made her the 2023 Oklahoma Teacher of the Year. From there, she made the 12 to win the nation's 2023 Teacher of the Year.

Peterson has travelled around the country, talking to teaches about binging 13 back to Classrooms. Her goals include emphasizing the positive experiences students have not only with math but with learning 14 . She hopes her stories will attract new teachers to the profession and give 15 to current ones.

Grief ran through the first decade of my career. I photographed stories about terrible topics: immigration, conflict, war. On the cover of my notebook in 2019, I wrote, "Discover the joy again." It was intended to remind me to play more.

Sometimes I'd get a rare assignment where I could breathe — for example, photographing an article on tea for an airline magazine. I took the job hoping to make interesting, almost movie images, but at the end of the day, I found I'd made nothing of the sort. Packing up my camera, I felt like a failure.

On the drive back to the hotel, I noticed heavy steam rising from a building up ahead. Arriving at the scene, I opened the car door — and realized it was a tourist attraction traditionally pulled by a steam engine. Then, out of nowhere, a figure ran toward me. I picked up my camera and quickly made three pictures. One was out of focus. One was poorly composed. But one worked.

When I submitted my pictures to the editor for the tea article, this one wasn't chosen to be published, but I knew it meant something to me. I had been looking for good luck in my own life. This photograph symbolized exactly that.

I was 27 when I first traveled to India after the sudden passing of my father. Over many months, with my best friend, I traversed India with no phone, with limited Internet, and with healing as my compass. I climbed mountains, swam in the sea, and lived in relief entirely.

As I learned to travel to some of the world's cities with the largest population, I began to see life with more color and magic. I permitted myself to walk aimlessly, with no goal but to observe, and each moment became a dance. If this journey taught me anything, it's that what comes next will bring its own magic.