1 . An 85-year-old primary school constructed in 1935 in Shanghai has been lifted off the ground in its entirety and relocated using new technology called the “walking machine.” The project marks the first time this “walking machine” method has been used in Shanghai to relocate a historical building.

Urbanization（都市化）has continued to significantly threaten architectural heritage. In the capital Beijing, for instance, more than 1,000 acres of its historic hutongs and traditional courtyard homes were destroyed between 1990 and 2010.

In the early 2000s, cities including Nanjing and Bejjing-due to the critics’ protest about the loss of old neighborhoods-drew up long-term plans to preserve what was left of their historic sites, with protections introduced to safeguard buildings and restrict developers.

These conservation efforts have taken different forms. In Beijing, a near-ruined temple was transformed into a restaurant and gallery, while in Nanjing, a cinema from the 1930s was restored to its original form, with some additions providing it for modern use. In 2019, Shanghai welcomed Tank Shanghai, an arts center built in renovated（重修的）oil tanks.

“Relocation is not the first choice, but better than destroying,” said Lan, the Shanghai primary school’s project supervisor. “I’d rather not touch the historical buildings at all.” Building relocations he said however, are “a workable option.” “The central government is putting more emphasis on the protection of historical buildings. I’m happy to see that progress in recent years.”

Shanghai has arguably been China’s most progressive city when it comes to heritage preservation. The survival of a number of 1930s buildings and 19th-century “shikumen” （or “stone gate”） house have offered examples of how to give old buildings new life.

“We have to preserve the historical building no matter what, ” Lan said. “The relocation has challenges, but in general, it is cheaper than destroying and then rebuilding something in a new location.”

4 . A century ago, people needed help to understand science. Much as they do today.

Then as now, it wasn't always easy to sort the accurate from the erroneous. Media regarded science as secondary to other mission. When science made the news, it was often confusing, or misleading.

E.W. Scripps, a newspaper publisher, and William Emerson Ritter, a biologist, sensed a need for reliable news about science, devoted to truth and precision. So Science Service was born - soon to give birth to the magazine now known as Science News.

In its first year, Science Service delivered its weekly news reports to newspapers. By 1922 they became available to the public, giving birth to Science News-Letter, the ancestor of Science News. Then as now, the magazine included all flavors of science — from the atom (原子) to outer space, from agriculture to oceanography, from transportation to nutrition.

In those early days, much of Science Service focused on space and new technologies, filled with various guessing and arguments. Much of the century's scientific future was predicted, though not all predictions aged well.

In the century since, real science has progressed to an advanced degree of wisdom, to an extent almost unimaginable to the scientists and journalists of the 1920s.

When Science Service launched its mission, astronomers were unaware of the extent of the universe. No biologist knew what DNA did. Geologists saw that Earth's continents looked like separated puzzle pieces, but declared that to be a coincidence.

Modern scientists know better. Yet somehow scientists still pursue the same questions. It turns out that the past century's groundbreaking experimental discoveries, revolutionary theoretical revelations and prescient guessing have not removed science's familiarity with false starts, unfortunate missteps and shortsighted prejudices. Researchers today have expanded the range of the reality they can explore, yet still trip through the remaining uncharted jungles of nature's facts and laws, seeking further clues to how the world works.

Science is more like it is today than it ever has been. It remains as challenging as ever to human inquiry. And the need to communicate its progress, sensed by Scripps and Ritter a century ago, remains as essential now as then.

5 . Inside the World's Largest Flower Show

The RI IS Hampton Court Palace Flower Show is the largest annual garden and flower show in the world. The showground covers 33 acres and most visitors stay for about 5 hours. It takes place in the grounds of Hampton Court Palace each July and is organized by the Royal Horticultural Society（RHS）.

Getting There

The nearest train station is Hampton Court. Full information of all travel options can be seen on the Getting to Hampton Court Palace page.

Tickets

Ticket prices start from £21.50.

Prices vary depending on the time and date of your visit.

Each full paying adult may bring two children aged 16 and under free of charge to the show.

Tickets are available on the door.

Opening Times

10a.m. until 7:30p.m.. It closes at 5:30p.m. on Sunday.

Tuesday and Wednesday: RHS Members only.

Official Website:www.rhs.org.uk

Tips for Visiting

● You could visit Hampton Court Palace on the same day but allow plenty of time as it takes 3-5 hours to visit the flower show and 1-3 hours to visit the palace.

● This is a temporary outdoor event on open parkland and is subject to varying weather and ground conditions. A temporary walkway is laid but it can still get pretty muddy if there's been heavy rain. Open-toed shoes and high heels are not usually appropriate footwear.

● Left Luggage and a drugstore service are both available on the show site.

● The Advisory Service offers free gardening advice to visitors. Check the information boards for locations.

● Plant and Product Deposit: There is a plant and product deposit service available where you leave your purchases while you enjoy the rest of your day out.

6 . The public nowadays has a misunderstanding of forest fires, believing that fires should be kept out of every type of forest. Many of us can recall Smoky the Bear's famous warning: “Remember, only YOU can prevent forest fires”. However, that's not always the case. Under the right conditions, and when conducted safely, fire can create many environmental benefits as well as help prevent larger, uncontrollable wildfires.

After a forest fire, many wildlife species will move into recently burned areas to feed on these newly available foods. Some reptiles and amphibians such as the pine (松树） snake prefer forests frequently burned by fire. As Herbert Stoddard put it, “One of the most harmful things modern man has done to birds has been his attempt to exclude fire from fire-type pine forests. Within a few years most forests choke up with bushes, lose their prairie-like vegetation (草原般植被） and can no longer support birds dependent on periodic burning for their food supply and proper cover.”

If you are asked to picture the forest floor, what do you see? Pine needles, cones, leaves, branches might come to mind-all sources of fuel. If these fuel sources build up without any type of removal, the 'fuel load' can lead to fires catastrophic to forests and people alike. In contrast, prescribed fire can be used by forest professionals every couple of years to keep forest fuels at an appropriate and manageable level. They can also minimize the spread of pest insects and disease and remove unwanted tree and plant species. Plus, they can create and maintain important wildlife habitats rich in grasses and promote the growth of trees, wildflowers and other various plants.

Many organizations and agencies work to promote fire on the landscape when and where appropriate. Smokey Bear even has an updated warning: “Only You can Prevent Wildfires,” as the Forest Service has over the last few decades developed policies and procedures to include prescribed fire as a management tool, as well as continuing their work to prevent and fight wildfires.

7 . Emerson, my 11-year-old daughter, is constantly contacting with the United States Postal Service (USPS)and our mail carrier, Doug. She las a serious letter-writing habit and maintains correspondence with her favorite people. If you've been the receiver of her hand-decorated letters and envelopes, then I know they really make your day.

A letter from Emerson is likely to include some art, a joke and enough questions to guarantee a response. But when she wrote a letter to Doug, she put something new in it: "You may know me as the person living here that writes lots of letters...You're very important to me, helping me stay in touch with friends. I cheer people up with my letters, but you do too!"

The next day, a package arrived with two letters. One was from Doug and the other from his superior, Sara, saying she had shared Emerson's note in the internal newsletter of the USPS and believed many postal folks wanted to thank Emerson. Emerson was so pleased with the letter that it upset me much, for the possible result of no reply would come as a blow to her.

Surprisingly, today, we saw Doug come with two boxes of letters from around the country. These letters were so human, filled with family, pets and a sense of kindness. But there was something more in them. People felt seen—some for the first time in a long time. "I work alone in a small rural post office..." "Not many people think about how hard we work…" Emerson wrote back seriously.

I'm sharing this not because I'm a proud dad, but because it's relatively easy, if we take the time, to give others links they need to be well. We all want to be seen, known and loved. Send a letter. Give a call. Take a step of bravery, like Emerson.

8 . Until now, scientists haven’t been able to study the new rock on the moon.The new samples from Chang’e 5 will change this. They’re from near Mons Rümker, a volcanic mountain where the rock is thought to be much younger-- about 1 billion years old.

There are a lot of reasons scientists are eager to study this younger rock, one of which is that it could help us more precisely date not only the moon, but many rocky planets and other objects.

Here’s how that works: Scientists date lunar rock by using something called a chronology curve（年代学曲线）, says Jollliff, a scientists at Washington University in St. Louis. Basically, they estimate the age of the rock by counting the number of craters（火山口） in the area the rock comes from; those increase as objects strike the rock over time. To make this estimation, scientists need to match the number of craters to a precise age. Right now, they only have data points for lunar rock that is 3 to billion years old. Modern techniques can date the new sample extremely accurately, and once scientists know its precise age, they can add a valuable data point to their chronology curve. The dating system will also help us more accurately estimate the age of all sorts of objects in space, like rocky planets and other moons.

Another reason scientists are keen to study this young volcanic rock is to find out more about how volcanism works on the moon. Jollliff says that it’s unclear why there was volcanic activity on the moon for such a long period of time. Most of the moon; s volcanic activity, he says, is thought to have occurred 3 or 4 billion years ago, when the moon was still pretty young. But since the moon does not have plate structure, which drives volcanism on Earth, it’s unclear what could have caused much later volcanic activity. “That’s something that you can find out of the samples by studying them in the lab,” Jollliff says.

10 . Slowing down was the last thing on Elaine Schaefer's mind when she turned 70 last year. She'd enjoyed an ambitious travel schedule for the previous decade. She didn't feel too old to travel.

Yet many people are asking that slightly embarrassing question: Can you be too old to travel? The travel industry has already responded. Try renting a car in Europe, for example. In Croatia, Schaefer wouldn't be able to this year, because the maximum age is 70. Insurance companies require higher rates; tour operators limit certain activities. That feels like a " no" for many travelers.

Definitely some folks should think twice before traveling, but not only based on their age. It's their level of fitness, says Kirsten Veldman, a former tour guide who now edits a retirement blog. She recalls a 93-year-old who was disabled and traveling alone on a Caribbean tour. "You can't expect to ask a tour leader to be there for you 24/7 for medical care. " she says. "Tour guides don't have the time, skills, and knowledge for it. So, in this case, my advice is: he shouldn't have traveled with us in this situation. "

But some tour operators serve older travelers. For example, Grand Circle Travel started in 1958 to serve senior members. “We have travelers into their 80s and even 90s. Some travel as a couple and some alone,” says company spokeswoman Ann Shannon. “We have no age limit.”

If you ask travel experts, they'll tell you that age is just a number. It's a question of physical, and to a certain extent, mental ability. "Many of our travelers are retired, focused on keeping their good health, and are experienced travelers who have a good idea of what to expect, "says Sara Baer-Sinnott, president of Oldways, a food and nutrition nonprofit that operates tours. "Someone in their 40's may struggle more than someone in their 80s. "