【推荐2】A study of Australian teens' Instagram （a popular photo social media platform） usage found 57% of Australian teenagers use it, while 30% reported being contacted by a stranger, and 20% reported being sent inappropriate unwanted content.

Facebook is considering launching a version of Instagram for children under the age of 13 to safely use it. Currently the company does not allow people who are under 13 to create an account on the platform. A spokesperson for Facebook, announced the company was exploring a parent-controlled version, similar to the Messenger Kids app that is for kids between 6 and 12.

"Increasingly kids are asking their parents if they can join apps that help them keep up with their friends. Right now there aren't many options for parents, so we're working on building additional products that are suitable for kids, managed by parents," the spokesperson said. "We're exploring bringing a parent-controlled experience to Instagram to help kids keep up with their friends, discover new hobbies and interests, and more."

In a blog post, the company noted that although people were asked to enter their ages when signing up for Instagram, there was nothing to prevent them from lying about their ages at registration. Facebook said it would overcome that by using machine learning in association with the registration age to determine people's ages on the platform.

The company also announced plans to roll out new safety features, including preventing adults from messaging children under 13, sending safety notices to children when they are messaged by an adult who sends a lot of friend requests, and making it more difficult for adults to find and follow children using the search function in Instagram. Children will also be encouraged to keep their profiles private at the point of registration.

【推荐1】Men hunted.Women gathered. But the discovery of a woman buried 9,000 years ago in the Andes Mountains with weapons and hunting tools challenges this widely accepted view. The woman, thought to be between 17 and 19 years old when she died, was buried with items that suggested she hunted big-game animals by spear (矛) throwing.

The objects accompanying people in death tend to be those that accompanied them in life. Although some scholars have suggested a role for women in ancient hunting, others have dismissed this idea even when hunting tools were uncovered in female burials.

To examine whether this woman found at this site was an exception, the researchers examined 429 skeletons at 107 burial sites from around 8,000 to 14,000 years ago. Of those, 27 individuals were buried with hunting tools—11 were female and 15 were male. The sample was sufficient to “justify the conclusion that female participation in early big-game hunting was likely nontrivial,” said lead study author Haas.

The findings add to doubts about “man-the-hunter” assumption about early humans since the mid-20th century. That theory assumes that it was men who went out and hunted, bringing home meat to feed women and children, who were responsible for gathering berries, plants and nuts to enrich the dict.

But recent research suggests hunting was very much a community-based activity, needing the participation of all able-bodied individuals to drive large animals, the study said. Meanwhile, the spears used at that time had low accuracy, encouraging participation, and using it was a skill learned from childhood. Women may also have been freed from child care demands by “allo-parenting”—raising children was a job shared by many.

“Our findings have made me rethink the most basic organizational structure of ancient hunter-gatherer groups, and human groups more generally,” Haas said.

【推荐2】Before the Renaissance (文艺复兴), art developed very slowly for about 1,000 years in Europe. Most art was made to serve the Church. Human beings in the art work were typically described as morally fallen and had to be saved by God and human life was regarded just a preparation for the happiness in the other world.

But the Renaissance (14〜16 century) upended all the above ideas. The “Renaissance Men” thought that the best way to serve God was not to bow down in church all day long but to recognize and make better use of the talents that God gave them. Human life was much more than a preparation for the other world.

For the Renaissance artists, they started to combine art and science in their work. They studied human bodies like doctors, nature like biologists and the laws of perspective like mathematicians to create realistic paintings and statues. For example, Leonardo da Vinci — an Italian sculptor, engineer, inventor and thinker — studied human bodies and observed the flight of birds. Another equally inventive and fearless Italian artist, Michelangelo Buonarroti, even went so far as to show in his work that human beings were truly made in God’s own image and that they were as great as their own creator. Raffaello Santi, the youngest of the great three Italian Renaissance artists，combined the quiet elegance of Leonardo with the raw power of Michelangelo. In his huge painting, The School of Athens, Raffaello celebrated the great ancient thinkers — a shocking break from Church tradition. And to make these once forbidden figures seem even greater, Raffaello presented the great thinkers of ancient Greece as the leading geniuses of his generation. Not only did these Renaissance-era Italians appreciate the great minds of the ancient world, they considered themselves in the same league.

Although the cultural explosion slowed down in Italy by 1600, people from around the world were already attracted to see the Renaissance-era masterpieces by then. Especially today, people continue to get inspiration from the great works of the era in the country.

【推荐3】When I was having a cold, my Chinese friends suggested “drink more hot water.” When I was exhausted, my mum said “drink more hot water.”     1     Whenever you are not feeling well, people offer you hot water.

    2     It lies in history. In ancient China, people lived by rivers with access to water but the water drawn from natural sources could potentially make them sick because of microorganisms. People not only drank water from rivers but also washed clothes and threw their shits into rivers. So boiling water became the easiest way to kill the bacteria.     3     For the poor, fuel was a luxury. Also, according to the earliest work on traditional Chinese medicine, the Huangdi Neijing, warm water can effectively improve people’s health by helping their organs function properly, but drinking warm water didn’t become a habit of the entire population until the 20th century.

In the 1930s the government launched a civic movement that encouraged people to drink boiled water to prevent the spread of diseases like dysentery. In 1949, the Communist government launched a public health campaign across the country. Posters hung in schools said “Children should cultivate the habit of drinking boiled water three times a day.     4    

If you travel in China, you will see every office, train station, theatre, and restaurant has hot water dispenser. If you have a formal meeting with professionals in China, the first thing they offer you will be hot water or tea. Hot water has been an important part of Chinese people’s lives and culture.     5