1 . It’s unlikely that we’ll see a dodo, a flightless bird, walking this earth anytime again, according to Beth Shapiro, a evolutionary molecular biologist.

“When most people think about de-extinction, they’re imagining cloning,” Shapiro said. Cloning, the approach that created Dolly, the sheep in 1996 and Elizabeth Ann, the black-footed ferret in 2020, creates an identical genetic copy of an individual by putting DNA from a living adult cell into an egg cell from which the nucleus (细胞核) has been removed. Adult cells contain all the DNA needed to develop into a living animal. Egg cells then use that DNA as a blueprint to turn themselves into many kinds of cells——skin, organs, blood and bones——the animal needs.

“But no living cells from dodos exist. Instead,” Shapiro said, “you’d have to start with a closely related animal’s genome (基因组) and then change it into one similar to dodos.” For example， mammoths (猛犸) are also extinct，but they were very closely related to modern Asian elephants, so researchers are attempting to bring mammoths back from extinction by creating a hybrid mammoth with some mammoth genes replacing part of the elephant genome in an elephant egg cell. However, there are likely millions of genetic differences between the genome of an Asian elephant and that of a mammoth according to Shapiro.

As for the dodo, its closest living relative is the Nicobar pigeon. Mammoths and Asian elephants are pretty closely related, whereas it had been more than 20 million years since the dodo and the Nicobar pigeon had any common ancestors. Genetic differences between the two bird species are therefore much greater, making it a formidable task to create a successful hybrid in the lab, Shapiro said.

Even if scientists manage to bring dodos back, the island where they once lived is a very different place nowadays, which make it impossible to reintroduce dodos without major intervention.

2 . Recycling is a great way of doing your bit for the environment and helping to protect the earth’s precious resources. However, a new study has revealed that our desire to be sustainable maybe doing more harm than good. According to waste company Biffa, this is because of “wish-cycling” — assuming that items such as disposable coffee cup sand pizza boxes will be recycled if put in the recycling bin. In fact, pollution from those items or other non-recyclables can result in recyclable items that have been put in the correct bin going to landfill. David Heaton, a business director at Biffa, said: “Pollution happens when items are disposed of in the wrong bins or haven’t been cleaned before being recycled.”

Experts at Biffa analyzed the amounts of non-target and non-recyclable materials that entered UK material recycling facilities between 2016 and 2020. It was found that, in 2016, the average pollution rate of recycling waste was 13.4 percent, rising over four years to 17 percent by the end of 2020. This shows that, even as people are becoming more eco-conscious, wish-cycling is increasing both in households and businesses.

The Biffa experts say that one of the best ways to prevent pollution of recycling is to clean recyclable waste before putting it in the bin. They suggest cutting off the top of old pizza boxes and only recycling that part to avoid pollution from the grease (油脂). Check the on-packaging recycling label to check it can actually be recycled When it comes to plastics, Biffa recommends checking the resin code, the number in the plastic triangle, to know whether it should go in the recycling bin. In general, resin codes 1, 2, 4 and 5 are recyclable, while 3, 6 and 7 are not. Larger items, like electronics, furniture and batteries, can also be recycled but often can not go in household recycling bins as they need specialist separating. These will need to be taken to recycling centers or sustainable waste management companies.

“It’s vital as a nation that we get better at effective ‘pre-cycling’— sorting waste correctly before collection to reduce pollution rates,” added Mr. Heaton.

3 . For decades, I was a hard drinker who could drink anyone under the table. This lasted from the age of 27 until after 50, a golden time during which I felt very sorry for ex-drinkers and people who couldn’t or wouldn’t drink. How did they make it through social situations, especially parties? What did they do at the end of a workday to celebrate and relax?     1    

When I first tried to quit drinking myself in my early 50s, I wasn’t sure at first how it would work for me. But I did it anyway.    2     I was getting older. I had to concede that I wasn’t as tough as I used to be. Nights of drinking too much showed in my face, and I could feel it in my bones. I wanted to take care of myself. So for the next few years, I bounced between not drinking at all for months at a time, then slowly starting again until I had to quit again.

During these years, I didn’t love not drinking. But I had to admit that when I was off booze, I looked and felt better physically: I slept more deeply, had more energy, exercised more. My mind was clearer. My moods were brighter. Parties were hard, and so was cooking at the end of a day of writing without a glass of wine at my elbow.    3    

I finally quit drinking for real almost four years ago, on 12 July 2019, when a writer friend stayed with my husband and me after his wife kicked him out. After my husband had gone upstairs to bed, my friend sat on our sofa drinking an entire bottle of gin, complaining about his fate, until he passed out next to our dog, whose bed that sofa was.    4     I didn’t have a drink the next night, or ever again since.

I’m not going to lie: being sober is not a hot-air balloon ride.    5     Having to feel my damn feelings without filters compels me to face and change the things in my life that keep me stuck. Hard work all around, but as my reward, I connect more deeply with the people I care about. I think of not drinking as a kindness I’ve given myself. And to my surprise, it’s rewarded me with true, hard-won happiness.

4 . As a popular tour operator, Travel China Guide designs a lot of China tour packages (旅游套餐) for foreigners with the best-selling travel deals to wonderful must see destinations and offers the best quality services. We warmly invite you to join us on an exciting vacation. Today we will offer you a three days’ private Zhangjiajie in-depth tour.

Welcome to this charming city, Zhangjiajie. Your guide and driver will pick you up at the airport and drive you to the hotel we booked for you ahead of time. The rest time of the day remains free for you to relax.

Today, your private Zhangjiajie tour will start with a visit to the Zhangjiajie Grand Canyon, where you will have a chance to experience the world’s longest and highest glass bridge, Zhangjiajie Glass Bridge. In addition to an unforgettable experience, it will also give you a special angle to enjoy the beauty of the Grand Valley

Afterwards, your guide will lead you to the Baofeng Lake where you will take a scenic boat ride. When you finish visiting the scenic area, the driver will send you back to the hotel.

Today your Zhangjiajie tour will continue to go to the Tianmen Mountain, known as the most beautiful “Hanging Garden” in the world. Tianmen Mountain is named after a natural wonder, Tianmen Cave, which is a naturally formed hole among thousand-metre high cliffs. In addition to this wonder, you may also see different old trees, green vines and rare animals there.

Your three-day Zhangjiajie tour package will come to an end here. You will then be driven to the airport and we will say goodbye there. If you want to have your China tour schedule further, we will be glad to provide detailed information.

5 . One thing that has always attracted us is the food taboos (禁忌). There is one that seems to be acknowledged in the West: the idea that seedless (无籽) fruits are dangerous.

For those unfamiliar with this belief, it seems to go like this. The basic function of fruit in nature is to spread the seeds of the plant to ensure the survival of the species. When fruits are seedless, however, it is meant to be a sign that they want to give up their basic function. According to more extreme views, these fruits not only have fewer vitamins and minerals, but also are actually harmful to humans.

In fact, from the view of science, seedless fruits are the result of a biological development. While it is true that this development can be the result of human actions, it also happens in nature all the time. Often, it is a combination of both.

What effect does the absence of seeds have on nutrition (营养)? Well, seeds do often contain nutrients like fibre, which can mean seed-containing fruits are a little bit higher in fibre. They can also contain potentially beneficial nutrients. This, however, will make a difference only when you eat up the seeds, bite them with your teeth and break the seeds in a digestible form.

Then there is the question of popularity. It doesn't matter how nutrient-packed a crop is if people are unwilling to eat it. While the nutritional difference between seeded and seedless is very small, we know that the sale of seedless fruits has greatly increased since seedless forms were introduced to the market. So when seen in this wider viewpoint, rather than being a loss for nutrition in our diets, seedless fruits have been a gain for us human beings.

8 . As is known to all, true beauty comes from within, but sometimes it’s not easy to know how to explain it.     1    .

Inner beauty is in the everyday choices you make.

When we are faced with small, daily choices such as whether to tell a white lie to avoid trouble, our inner beauty or lack thereof comes out.     2    . Honesty is real inner beauty. While no one is perfect, inner beauty will show itself in the repeated choices a person makes.

    3    .

I’ve known several people who were pretty on the outside, but when they said unkind words, they suddenly looked so ugly! True beauty comes from within and often comes out through your words.

Inner beauty is in how you respond to (应对) mistakes.

When someone makes a mistake and it annoys you, how do you respond? True beauty comes from within when someone is understanding. Someone without inner beauty will be angry. And when you are the one who made a mistake, how do you respond? Do you accept it and move on, giving yourself room to grow? A person with inner beauty doesn’t see mistakes as threats.     4    .

Inner beauty is on the outside.

If you look closely enough, you can see inner beauty from the outside.     5    . And the truth is that when people get to know you, inner beauty is all there really is. The opposite is true if you have ugliness on the inside—it will come out in your expression. The truth comes out, and it really does, whether you like it or not.