3 . Everywhere I look, there are new buildings under construction. The neighborhoods that I knew as a boy, filled with beautiful old buildings, have mostly disappeared, and in their place, modern, high-rise buildings have appeared. There is good reason for this. Residents want all the conveniences of modern living. However, how can our children understand and maintain their cultural identity if we erase so much of the physical evidence of it?

The arguments for preserving historic buildings are not simply about an emotional attachment to the past. There are also good economic arguments in favour of preservation. The renovation (修缮) and preservation of historic districts can become an economic engine, drawing tourists and small businesses to the area. For example, in Dubai, the historic Al Bastikiya district draws thousands of tourists every year from all over the world. It also attracts local residents, eager to learn about their city's past.

Some have argued that historic preservation is too expensive, but many recent projects have demonstrated that this is not necessarily the case. In fact, renovation of an existing structure for adaptive reuse can cost about £40 per square metre less than even the most basic new construction, while preserving the beauty of the original building. And, although it is often claimed that old buildings have a more significant environmental footprint than new construction because they aren’t very energy efficient, architects and environmental experts maintain that the greenest building is the one that is already built. New construction almost always has a more serious environmental impact (影响) because it requires the use of all-new materials that must be transported, often over long distances, instead of recycled materials that are already on site. We recycle so many other things. We can and should recycle buildings, too.

Historic preservation is an option that opens many possibilities; demolition (拆毁), in contrast, is irreversible. Once these treasures are lost, they are lost forever, an important link in our heritage that can never be recovered.

4 . Consumers may soon find meat on restaurant menus that has never walked the earth—grown from cell to fillet (肉块). The product, called “cultured” or “cultivated” meat, is reaching more plates. Cultivated chicken has been sold in a Singapore restaurant since 2020, and recently the Department of Agriculture approved the sale of cultured chicken in the United States. More than 150 businesses worldwide are working to put beef, fish, and pork on the market, too.

Cultured meat begins as a cell from an egg or a piece of traditionally butchered meat. Fed with certain nutrients for two or three weeks, the meat is processed into forms that consumers are familiar with. “Initial research is in a lab, but the meat is made in a production facility.” says Josh Tetrick, CEO of Good Meat, one of the USDA-approved cultured chicken manufacturers. The company has made public their own nutrient analysis, evaluated by the Food and Drug Administration, which reveals that the nutritional profiles of their products are almost identical to conventional meats.

By alleviating the raising and killing of animals, cultured meat companies say their product helps reduce animal cruelty and will be better for the environment. Their process uses far less land because there’s no need to house animals or grow their feed. Cultured beef, especially, could reduce the number of cattle on farms-a significant source of methane emissions. However, some studies contradicted that cultured meat may also require greater energy usage than conventional production. Much of the environmental impact will depend on whether the energy used is renewable and on the efficiency of future production technology.

Given a growing consumer consciousness around animal rights and climate change, supporters foresee a future meat market where consumers will choose between different kinds of conventional meat, cultured meat, and plant-based alternatives. Approved sale of cultivated chicken in the U.S. is a landmark moment, but not yet a revolution. While cultured meat’s widespread consumption and impact on the economy seem a step closer to reality, scientists, philosophers, and the product’s own manufacturers acknowledge years of work lie ahead.

5 . For even the most city citizens, a quick escape into nature is always a welcome breath of fresh air. Try looking for an urban garden nearby — they often hide themselves just around the corner. Click here to know more of the coolest gardens in cities around the world.

Sky Garden

As London’s highest public garden, this social space offers splendid 360-degree views of the city. With a restaurant, observation decks and beautiful plant life, there is something for everyone in this city-center escape from urban life.

The BeltLine

In a massive, 22-mile loop (环线) around the city, the BeltLine connects many Atlanta neighborhoods with parks, trails, restaurants and art shows. Although it is still under construction, the sections that are open to the public act as alternative space to enjoy the outdoors.

Jardins de Rubió i Lluch

This walled, shady garden is in the courtyard of the historic Hospital de la Santa Creu. Decorated with lilac and mandarin trees — and string lights in the evenings — this small garden square is the perfect place to sip a coffee away from Barcelona’s crowded atmosphere.

Dumbarton Oaks

The garden at this historic estate in Georgetown was listed as one of the 10 best gardens in the world by National Geographic in 2014. It has both a formal, carefully manicured (修剪整齐的) garden as well as a naturalistic garden — allowing visitors the ability to choose what they want to see.

7 . Survivor bias (偏见，偏差), occurs when you tend to assess successful outcomes and disregard failures. This sampling bias paints a more promising or even misleading picture of reality.

Survivor bias is a sneaky problem that tends to slip into analyses unnoticed. For starters, it feels natural to emphasize success, whether it’s entrepreneurs, or survivors of a medical condition. We focus on and share these stories more than the failures.

Think about the famous college dropouts who became highly successful, such as Mark Zuckerberg, Steve Jobs, and Bill Gates. These successful examples might make you think a college degree isn’t beneficial. However, that’s survivor bias at work! These famous individuals are at the forefront of media reports. You hear more about them because they are extraordinary. You’re not considering the millions of other college dropouts that aren’t rich and famous. You need to assess their outcomes as well.

Survivor bias has even occurred in medical studies about severe diseases. Younger, healthier, and more fit patients tend to survive a disease’s initial diagnosis more frequently. Hence, they are more likely to join medical studies. On the contrary, older, weaker patients are less likely to survive long enough to participate in studies. Consequently, these studies overestimate successful disease outcomes because they are less likely to include those who die shortly after diagnosis.

Undeniably, successful cases are usually more visible and easier to contact than unsuccessful cases. However, focusing on the high-performing successes and disregarding other cases introduces survivor bias. After all, you’re leaving out a significant part of the picture as it’s harder to collect data from the less successful members of a population. Incomplete data can affect your decision-making process. Put simply, survivor bias produces an inaccurate sample, causing you to jump to incorrect conclusions.

To minimize the impact of survivor bias, you should find ways to draw a representative sample from the population, not just a few of successful samples. That process might call for more expense and effort, but you’ll get better results.

8 . The most beloved bird in history may very well have been a 29-year-old pigeon by the name of Martha. It was the early 1900s, and Martha was at the height of her fame. Perched on her humble roost at the Cincinnati Zoo, she was an object of fascination to the thousands of visitors who lined up just to catch a glimpse. Martha may not have looked the part of an animal celebrity, but she was hardly average—in fact, she was the very definition of one of a kind. After the death of her companion George in 1910, Martha had become the world’s last-living passenger pigeon.

There was a time not long before when her kind accounted for more than a quarter of the birds in North America and may have been the most abundant bird species on the planet. Passenger pigeons used to travel at 60 miles an hour in flocks a mile wide and 300 miles long. Witnesses compared them to a train rumbling through a tunnel.

Ironically, the passenger pigeons’ very abundance may have spelled their doom. An agricultural pest and reliable source of protein, they became easy targets for hunters who killed them in the tens of thousands. In a matter of decades, a bird that once numbered in the billions was reduced to a few, and then, eventually, to one.

Martha, who’d grown up in captivity, had no offspring of her own. At 1 p.m. on September 1, 1914, Martha fell from her perch, never to rise again—one of the rare occasions in which historians could identify the exact moment of a species’ extinction.

Of course, the real tragedy was that the loss of the passenger pigeon was neither surprising nor unique. For as long as the Earth has sustained life, it has also seen the permanent disappearance of life forms, the dinosaurs being a particularly extreme example. But Martha’s high-profile death trained national attention on an alarming new trend. Close to a thousand animal species alone have died off in the last 500 years, and the trend is only getting worse.

9 . A brilliant theoretical physicist, J. Robert Oppenheimer was tapped to head up a laboratory in Los Alamos, New Mexico, as part of U.S. efforts to develop nuclear weapons. He succeeded — but would go on to advocate against developing even more powerful bombs.

Born in New York City in 1904, Oppenheimer studied theoretical physics at both Cambridge University and the University of Göttingen in Germany, where he gained his doctorate at age 23. Soon the young physicist “Oppie” rubbed shoulders with the greatest scientific figures of his age, and his academic work advanced quantum theory and predicted everything from the neutron to the black hole.

After the United States joined the Allies in 1941, Oppenheimer was asked to participate in the top-secret Manhattan Project, whose aim was to develop an atomic weapon.

On July 16, 1945, Oppenheimer and others gathered at the Trinity test site south of Los Alamos for the world’s first attempted nuclear blast. Conducted in secret, the test worked. On August 6 and August 9, 1945, the U.S. dropped two of the bombs Oppenheimer had helped develop over Hiroshima and Nagasaki. On the night of the Hiroshima bombing, Oppenheimer was cheered by a crowd of fellow scientists at Los Alamos, and declared that his only regret was that the bomb hadn’t been finished in time to use against Germany.

Twenty years after the attacks on both cities in Japan, Oppenheimer appeared in a 1965 NBC News documentary called The Decision to Drop the Bomb. “We knew the world would not be the same,” he said onscreen. “A few people laughed; a few people cried. Most people were silent. I remembered the line from the Hindu scripture (印度梵经), ‘Now I am become Death, the destroyer of worlds.’ I suppose we all thought that, one way or another.”

However, Oppenheimer opposed America’s attempts to develop a more powerful hydrogen bomb. Did he really live to regret helping develop the atomic bomb? No one knows. He doesn’t come into easy categories of pro-nuclear, anti-nuclear or anything like that. He’s a complicated figure.

10 . The time invested in kids learning how to cook is time well spent! From mixing and baking cookies to making and cooking fresh pasta, kids will be led by a professional chef throughout the entire class. With safety at the forefront, your chef will turn the kitchen into the classroom as kids learn valuable life skills, such as critical thinking, creativity and cooperation.

In this interactive cooking class designed for kids, Chef Jordan will teach fundamental kitchen skills, including the art of pasta making, while creating a classic spaghetti dinner. This class is recommended for ages 5-15.

Explore the art of pasta-making in this hands-on cooking class for kids. Chef ShaSha will guide you by using fresh ingredients and authentic techniques to make a handful of kids’ favorite dishes. This class is recommended for ages 8-18.

In this hands-on cooking class intended for kids, Chef Christmas will guide you in making non-traditional sushi. The rolls you make will have the authentic taste and texture of traditional sushi, but with a unique shape! This class is recommended for ages 5-15.

In this hands-on baking class with Chef Adolf, your kids will be on their way to feeling like the finest of chefs. Chef Adolf will show them how to mix, beat and fold ingredients into eats that everyone will love at a kid’s birthday party. This class is recommended for ages 8-15.