1 . Polar bears are icons of the Arctic. Detailed monitoring of their populations is crucial for their conservation—but because polar bears are so difficult to find, we are missing critical data about population size. Scientists have now developed a new tool to help: DNA analysis using skin cells left in the bears’ footprints in the snow.

The scientists were inspired by the techniques that can be applied to tiny, degraded DNA samples. With these techniques, it isn’t necessary to physically capture bears, which can be stressful and dangerous for both bears and humans. Instead, the researchers can turn to the snow tracks of polar bears and look at sources of DNA left in passing—environmental DNA. "The tracks usually contain fresh cells, and the DNA is intact because of the cold’ storage’ temperature, "said Dr. Melanie Lancaster of the World Wide Fund, lead author.

The scientists collected snow from individual tracks made by Alaskan polar bears in the wild. Additional materials like hair and saliva(唾液)were sampled, confirming that the tracks provided accurate genotype(基因型) 24 wild polar bear tracks were sampled. The researchers melted and filtered the snow to collect environmental DNA, then carried out micro-satellite analysis. Although the concentrations (浓度)of DNA taken from trucks sampled in the wild were very low, 13 of the wild polar bear samples could be genotype, identifying 12 different individuals.

This technique has huge potential to inform conservation of these animals, to better understand their populations and behavior. Although the sampling has a lower success rate, ease of collection means that it can significantly expand sample sizes.

"We hope this method will be taken up by the polar bear research community, with the involvement of hunters, volunteers, and local communities, as a new way to collect information on polar bears, "said Lancaster. "We also hope the method will be expanded to other animals living in snowy environments. "

2 . I was surprised to find the congestion (拥塞) outside Layla’s primary school was unusually absent—I’d driven right into a parking space, and I was on time, for once. The school bell rang, and in a moment a stream of children made their way through the gate. But something was different—the kids were piling into vehicles in threes and fours.

Before I could enquire my daughter Layla, Mr Trent, the deputy head, approached. “Mrs Pavis, did you not read our letter?” Letter? What letter? I had a history of not looking out for them, and not reading them in most cases. “The letter? Of course. It must have just slipped my mind—I’ve been away with work.”

Now I was digging around in Layla’s messy schoolbag at home. Eventually, I found several letters, all addressing the same topic—parking outside the school gates. Apparently with some parents parking illegally, the police were about to get involved. “Why didn’t you give me these letters?” I demanded. Layla shrugged. “I forgot.” I was about to launch into a severe lecture when it occurred to me that I had always forgotten—I had forgotten to give Layla her money for cookery that morning and forgotten to hang out the kids’ washed clothes.

I contained myself and figured out that they wanted the parents to car-pool (拼车). I spent the next half hour ringing round Layla’s friends’ parents, enquiring if they would like to car-pool with us. Unfortunately, they were all sorted. It was my own fault—I should have read those letters ages ago. “Er... I overheard others talking about it,” Layla said, “They said they didn’t know who would car-pool with us, because we’re always late.” I flushed instantly. We were a disorganised family, and I was the one to blame.

I resolved to change. With responsibility for my kids, I find I am never, ever late. It’s good for Layla and for her older brothers, and it’s good for me, because now I never leave the house unprepared. I’ve even started checking the kids’ schoolbags for notes from school.

4 . Cybercrime refers to any criminal offence related to the Internet. Internet crimes have been classified into four categories. First, they can be related to a lack of proper Internet security, such as downloading or deleting other people’s files without permission, and spreading computer viruses. The second are crimes usually committed without a computer, but can occur over the Internet. For some criminals use the Internet to cheat others of their money. Third, websites which offense information or encourage hatred and violence are named. Last, there are related to intellectual property (intellectual property is a design, patent, book, etc. law prevents other people from copying).

All Internet users are affected by cybercrime in one way or another. However, crime against a private organization in the USA, showed that 45.6 percent of the 351 biggest company government agencies had had their security systems broken into in the previous year. Security consultants tell us that cybercrime is costing firms worldwide hundreds of billions of dollars every.

Considering how bad the situation with cybercrime against companies has become, many people wonder why so little is known about this. The main reason is that most cybercrime is not reported. Until now, most companies have been unwilling to report cases of cybercrime. They fear that by doing so, they will lose customers, who may think that the company cannot protect their confidential information or their money.

All of this is made more difficult by the legal situation regarding cybercrime. Cybercrime is so new that many governments have not yet passed laws against it, and there are many holes in the legal systems. In addition, most countries do not have arrangements for dealing with suspects from other countries who may have committed cybercrime. Thus, it is difficult to catch criminals of cybercrime.

The only answer to this problem is international cooperation. Governments must join forces to keep up with the advances in technology used by the criminals. It is also important to draft new laws and negotiate international standards for fighting cybercrime.

5 . Chimps use loud calls and gestures to make their feelings known but until now, the exact meaning for individual movements has remained a mystery. Now researchers believe they have translated the key gestures used in the chimp community and identified their intentions for the first time.

From 4,351 gestures, experts were able to identify 66 that are used for 19 specific message meanings, including showing a foot to tell a child they can climb on their back. The researchers were able to narrow down these 66 gestures to 36 that are used intentionally to achieve 15 purposes. The translations were made by Dr Catherine Hobaiter and her colleagues at St Andrews University in Scotland.

Dr Hobaiter used behavior sampling and filmed all recorded cases of gestural communication. Other gestures include stomping their feet to ask another chimp to stop what they are doing, and slapping objects together to ask another to follow them. Of the 19 meanings,17 encouraged interactions to start, or to develop, such as “move closer,” and “change play”. Some of the gestures were found to have more than one meaning. and only 10 of the 66 gestures were used for only a single meaning.

Researchers collected a total of 471 video clips from two social groups of chimps at a shelter near Kinshasa, Democratic Republic of Congo. As well as identifying what the gesture means, they also discovered the technique needed to increase the chances of success.

“Human children use gestures to communicate before they produce their first words, and their earliest gestures typically appear around 10 months of age,” explained the researchers. “In great apes, there is good evidence that language-trained individuals are capable of acquiring and understanding signals, but this is far less clear in their natural communication. ”

7 . VATNAJÖKULL NATIONAL PARK, ICELAND

Vatnajökull National Park is home to one of the largest glaciers in the world and two active volcanoes. A popular place to explore ice caves, you can experience here the breath-taking views of waterfalls, frozen rivers and herds of reindeer through cave tours, glacial hikes and jeep safaris.

Best time to visit: May to September.

ARCHAEOLOGICAL RUINS OF LIANGZHU CITY, CHINA

Dating back to 5,300 years ago, the Archaeological Ruins of Liangzhu City is considered as an important representation of early urban civilization based on rice plantation. The city ruins show the contributions made by the Yangtze River Basin to the origins of Chinese civilization.

Best time to visit: March to May & October to mid December.

BAGAN, MYANMAR

Located on the banks of the Ayeyarwady River, Bagan is the capital of the ancient Burmese empire and features a stunning range of Buddhist art and architecture. Visitors can get the best views at sunrise by taking a hot air balloon ride and witness hundreds of architectural treasures as far as the eye can reach.

Best time to visit: November to February.

JAIPUR CITY, INDIA

The walled city of Jaipur is one of the most colourful cities in the world and part of India's famous Golden Triangle. The city is not only famous for its pink coloured buildings, but also the houses, shops, restaurants and hotels which give you a feast for colors.   Besides, you can enjoy the city's layout, busy streets and large public squares.   

Best time to visit: November to March.

9 . In the world of Chinese archaeology (考古学), a sign of a dig's importance is the sight of Zhou Mingsheng at work. A field technician who has worked at archaeological sites all around China. Master Zhou is credited with the gentlest touch in his profession. Born into a farming family, he is a “national-level craftsman” with a talent for using simple tools to get relics (遗物) that would crumble in other hands, says his current boss, Wang Xu, director of an archaeological site at Shuanghuaishu, a Neolithic (新石器时代的) settlement near the Yellow River in the central province of Henan.

It is not beauty that attracts visitors to Shuanghuaishu. At 5, 300 years old, the settlement is the work of a culture too simple to have left behind many buried treasures. The single most precious find, to date, is a finger-length sculpture of a silkworm. Nor is the setting lovely: an area surrounded by deafening insects, between a highway and two power stations. Rather, the site's importance is historical. For since the birth of Chinese archaeology in the 1920s, it has been inseparable from claims that China has the oldest unbroken civilisation on Earth.

Leading archaeologists say that the site has the right combination of location, age and distinctive cultural elements to be the capital of an early Chinese kingdom. That would make it a bridge between China's written history and the era of the Yellow Emperor, who is said to rule over these central plains almost 5,000 years ago, though many foreign scholars doubt his existence. Chinese media call the site proof of China's 5,000 years of history.

Foreigners complain about a lack of written records, Mr Wang notes. Perhaps they are missing symbols that will one day be understood, for instance in patterned pottery. Outsiders "can't keep using Western standards to apply to Chinese ruins," he argues.

10 . Sophia Gholz is an award-winning children's book author, music lover. and magic seeker. Sophia enjoys writing fiction with humor and heart. When writing nonfiction, she pulls on her love of science and her family background in ecology.

Her book, The Boy Who Grew a Forest, shares the true story of Jadav Payeng, a man in India who single- bandedly planted an entire forest over the course of his lifetime. When he was younger, Jadav Payeng was shocked by the destruction of his island home. So he took matters into his own bands and began planting one seed at a time. Jadav's forest is now over 1300 acres and provides a home to many animals, some endangered. Jadav is still planting today and his hard work has now been celebrated around the world.

To write this story, Sophia got to know more about Jadav Payeng and his forest through a documentary film called Forest Man. Influenced by her father, a forest ecologist and a scientist, she grew up learning about the importance of trees and the natural world. When she heard about a man on a m1ssion to reforest an entire island on his own, she was drawn to this story.

As for research, most of her research was done online. She read every news article that she could find about Jadav and listened to every interview. Then she reached out to several people who had met or interviewed Jadav as well, including the producer of his short documentary film.

She hopes that The Boy Who Grew a Forest lights a spark in everyone who reads it to go out and care for our beautiful planet. She'd love young readers to be inspired to plant or to learn more about animal habitats, biodiversity and science in general.