Only two countries in the advanced world provide no guarantee for paid leave from work to care for a newborn child. Last spring one of the two, Australia, gave up the bad distinction by setting up paid family leave starting in 2011. I wasn't surprised when this didn't make the news here in the United States — we're now the only wealthy country without such a policy.

    The United States does have one explicit family policy, the Family and Medical Leave Act, passed in 1993. It entitles workers to as much as 12 weeks' unpaid leave for care of a newborn or dealing with a family medical problem. Despite the modesty of the benefit, the Chamber of Commerce and other business groups fought it bitterly, describing it as “government-run personnel management” and a “dangerous precedent (先例).” In fact, every step of the way, as (usually) Democratic leaders have tried to introduce work-family balance measures into the law, business groups have been strongly opposed.

    As Yale law professor Anne Alstott argues, justifying parental support depends on defining(定义) the family as a social good that, in some sense, society must pay for. Parents are burdened in many ways in their lives: there is “no exit” when it comes to children. Society expects — and needs — parents to provide their children with continuity of care. And society expects — and needs — parents to persist in their roles for 18 years, or longer if needed.

    While most parents do this out of love, there are public punishments for not providing care. What parents do, in other words, is of deep concern to the state, for the obvious reason that caring for children is not only morally urgent but important to the future of society. To classify parenting as a personal choice for which there is no collective responsibility is not merely to ignore the social benefits of good parenting; really, it is to steal those benefits because they accrue (累积) to the whole of society as today's children become tomorrow's citizens. In fact, by some estimates, the value of parental investments in children, investments of time and money, is equal to 20-30% of GDP. If these investments bring huge social benefits — as they clearly do — the benefits of providing more social support for the family should be that much clearer.

    There might be as many as 10 million species of complex life on this planet today —— a huge number. But add up all of the complex species that ever lived and some biologists think the grand total would be about five billion. The estimate leads to an astonishing conclusion: a staggering 99% of species are not around any more. They have been driven to extinction.

    More species are joining the ranks of the extinct every year. Many scientists believe we are living through an episode of remarkably rapid extinction, on a scale that has been seen only five times in the last half a billion years.

    They call this current episode the sixth mass extinction —— a large, global decline in a wide variety of species over a relatively short period of time. And they tend to agree that humans are the main cause.

    Over-hunting, overfishing, and human-driven habitat loss are pushing many species to the brink. In fact, we have changed the planet so much that some geologists are now suggesting that we have entered a new phase in Earth's history; an epoch they call the ＂Anthropocene＂. By 2100, it is expected that humans will have caused the extinction of up to half of the world's current species.

    Because we are living through this extinction, it is relatively easy for us to study the driving forces behind it. But how do we determine what caused other mass die-offs that happened long ago? To do so we have to look at what archaeologists, palaeontologists, geologists and other scientists have concluded from the evidence they have gathered.

    The trouble is, those scientists do not always agree with one another —— even about the most recent extinction event. As well as the five-or six- mass extinctions, there have also been many smaller extinctions.

    One of these mini extinction events happened towards the end of the Pleistocene, a few tens of thousands of years ago. It is sometimes called the ＂megafaunal＂ extinction because many of the species it claimed were particularly large animals, weighing more than 97lb (44kg). However, its cause remains a debate amongst scientists.

    You often can choose a private setting when you browse(浏览) the internet. But be forewarned: It may not afford nearly as much privacy as you expect. That's the finding of a new study.

    Major web browsers, such as Google's Chrome and Apple's Safari, often a private-browsing option. It's sometimes referred to as “incognito.” This option lets you surf the Internet browser and saves a record into its history of each page that you visited. And what sites you visit won't affect the suggestions your browser makes the next time you're filling out an online form.

Many people believe—incorrectly— that the incognito setting protects them more broadly. Most believe it even after reading a web browser's explanation of the incognito mode.

    For instance, a new study had 460 people read web browsers' descriptions of private browsing. Each person read one of 13 descriptions. Then the participants answered questions about how private they thought their browsing would be while using this tool. The volunteers didn't understand the incognito mode. This was true no matter which browser explanation they had read. The researchers reported their findings on April 26 at the 2018 World Wide Web Conference in Lyon, France.

    More than half of the volunteers thought that if they logged into a Google account through a private window, Google wouldn't keep a record of their search history. Not true. And about one in every four participants thought private browsing hid their device's IP address. That's wrong, too.

    Blase Ur was one of the study's authors. He's an expert in computer security and privacy in Illinois at the University of Chicago. Companies could clear up this confusion by giving better explanations of the incognito mode, his team says. For example, the browsers should avoid vague（模糊).The web browser Opera, for instance, promises users that “your secrets are safe.” Nope Firefox encourages users to “browse like no one's watching.” In fact, someone might be. (If you'd like to know more about the research information, please click here.)

    In the nineteenth century, one of America's greatest writers, Walt Whitman, helped people learn to value poetry. Whitman created a new kind of poetry.

    Walt Whitman was born in eighteen nineteen in New York City. During his long life, he watched America grow from a young nation to the strongest industrial power in the world. As a young man, Whitman worked as a school teacher, a printer and a newspaper reporter. He was thirty-six years old when he published his first book of poetry in eighteen fifty-five. He called it Leaves of Grass. It had only twelve poems. The poems are written in free verse. The lines do not follow any set form. Some lines are short. Some are long. The words at the end of each line do not have a similar sound. They do not rhyme.

    One of America's greatest thinkers and writers immediately recognized the importance of Leaves of Grass. Ralph Waldo Emerson praised Whitman's work. But most other poets and writers said nothing and even denounced it. Most readers also rejected Whitman's poems. The new form of his poetry surprised many people. Even his own brother told Whitman that he should stop writing poetry. But Whitman had many things to say. And he continued to say them. Readers began to understand that America had a great new poetic voice.

    Walt Whitman's poems praise the United States and its democracy. The poet expressed his love for America and its people in many ways. Experts today praise Leaves of Grass as a major literary work. In eighteen seventy-three, Walt Whitman suffered a stroke. He spent the last years of his life in Camden, New Jersey. Whitman was poor and weak during the last years of his life. He died in eighteen ninety-two. Some critics say Walt Whitman was a spokesman for democracy. Others say he was not a spokesman for anything. Instead, they simply call him a great poet.

Some of the most famous and successful people in history battled self-doubt. {#blank#}1{#/blank#} fact, some held this feeling throughout their entire lives, even after their work had been held in high regard by {#blank#}2{#/blank#} public. Here {#blank#}3{#/blank#} (be) two famous people from history who struggled with self-doubt.

John Steinbeck

Even the Pulitzer Prize-winning American author John Steinbeck felt uncomfortable about the praise he got for his work. He wrote in his diary: "I am not a writer. I've been fooling {#blank#}4{#/blank#} (I) and other people." His famous realistic novel The Grapes of Wrath  {#blank#}5{#/blank#} (help) land him the Pulitzer Prize in 1940.

Michelangelo

World-renowned Italian Renaissance artist, {#blank#}6{#/blank#} (sculpt) and architect Michelangelo doubted his abilities before he created his famous painting, The Last Judgement, in the Vatican's Sistine Chapel.

The beginning of Michelangelo's career consisted mostly of sculptures, {#blank#}7{#/blank#} helped spread his name throughout Italy. However, Pope Julius II asked Michelangelo {#blank#}8{#/blank#} (paint) the wall of the Sistine Chapel. In response, Michelangelo refused at first, {#blank#}9{#/blank#} (say) that he was not a painter.{#blank#}10{#/blank#} (final), he accepted the Pope's request and spent four years on the painting.

China on Tuesday launched (发射) the Shenzhou-16 manned spaceship, sending three astronauts to its space station combination for a five-month mission. The spaceship, atop a Long March-2F carrier rocket, was launched from the Jiuquan Satellite Launch Center in northwest China at 9:31 a. m. (Beijing Time), according to the China Manned Space Agency (CMSA).

About 10 minutes after the launch, Shenzhou-16 separated from the rocket and entered its designated orbit (轨道). The three astronauts are in good shape and the launch is a complete success, the CMSA declared.

The Shenzhou-16 astronauts will conduct a great many in-orbit tests and experiments in various fields as planned. They are expected to make high-level scientific achievements in the study of novel quantum phenomenon (新奇量子现象), high-precision space time-frequency systems and the origin of life.

Jing Haipeng, Zhu Yangzhu and Gui Haichao will see the dockings of the Tianzhou-5 cargo craft and the Shenzhou-17 manned spaceship, as well as the departures of the Shenzhou-15 manned spaceship and Tianzhou-5.

It is the first manned task for the application and development stage of China's-space station, and the 29^th flight since the country's manned space program was approved (批准). The launch also marks the 475^th flight of the Long March carrier rocket series.