Imagine that you're looking at your company-issued smartphone and you notice an e-mail from Linkedln:“These companies are looking for candidate like you!” You aren't necessarily searching for a job, but you're always open to opportunities, so out of curiosity, you click on the link. A few minutes later your boss appears at your desk. “We've noticed that you're spending more time on Linkedln lately, so I wanted to talk with you about your career and whether you're happy here,” she says Uh-oh.

    It's an awkward scene. Attrition(损耗) has always been expensive for companies, but in many industries the cost of losing good workers is rising, owing to tight labor markets. Thus companies are making greater efforts to predict which workers are at high risk of leaving so that managers can try to stop them. Methods range from electronic monitor to sophisticated analyses of employees' social media lives.

    Some of this work may be a reason to let employees to quit. In general, people leave their jobs because they don't like their boss, don't see opportunities for promotion or growth, or are offered a higher pay; these reasons have held steady for years.

    New research conducted by CEB, a Washington-based technology company, looks not just at why workers quit but also at when. “We've learned that what really affects people is their sense of how they're doing compared with other people in their peer group, or with where they thought they would be at a certain point in life, says Brian Kropp, who heads CEB's HR practice. “We've learned to focus on moments that allow people to make these comparisons.”

    Technology also provides clues about which star employees might be eyeing the exit. Companies can tell whether employees using work computers or phones are spending time on (or even just opening e-mails from) career websites, and research shows that more firms are paying attention to these things. Large companies have also begun tracking badge swipes(浏览痕迹)—employees' use of an ID to enter and exit the building or the parking garage—to identify patterns that suggest a worker may be interviewing for a job.

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    Mandara seemed to know something big was about to happen. So she let out a yell, caught hold of her 2-year-old daughter Kibibi and climbed up into a tree. She lives at the National Zoo in Washington D. C.

    And on Tuesday, August 23rd, witnesses said she seemed to sense the big earthquake that shook much of the East Coast before any humans knew what was going on. And she's not the only one. In the moments before the quake, an orangutan（猩猩）let out a loud call and then climbed to the top of her shelter.

    “It's very different from their normal call,” said Brandie Smith, the zookeeper. “The lemurs（monkeylike animals of Madagascar）will sound an alarm if they see or hear something highly unusual.”

    But you can't see or hear an earthquake 15 minutes before it happens, can you? Maybe you can—if you're an animal. “Animals can hear above and below our range of hearing,” said Brandie Smith. “That's part of their special abilities. They're more sensitive to the environment, which is how they survive.”

    Primates weren't the only animals that seemed to sense the quake before it happened. One of the elephants made a warning sound. And a huge lizard（蜥蜴）ran quickly for cover. The flamingoes（a kind of birds）gathered before the quake and stayed together until the shaking stopped.

    So what kind of vibrations（震动）were the animals picking up in the moments before the quake? Scientist Susan Hough said earthquakes produce two types of waves—a weak “P” wave and then a much stronger “S” wave. The “P” stands for “primary”. And the “S” stands for “secondary”. She thinks the “P” wave might be what sets the animals off.

    Not all the animals behaved unusually before the quake. For example, Smith said the zoo's giant pandas didn't jump up until the shaking actually began. But many of the other animals seemed to know something was coming before it happened. “I'm not surprised at all,” Smith said.

    Do you have any foreign friends? Do you know their characteristics(特征)?

    The Germans are very quiet and they always keep calm. They don't like to speak many words. They look very serious. They like different kinds of amusements. The Germans are very hard-working. They like tidiness, especially the women, who always keep their home clean.

    In some ways, the Englishmen look the same as the Germans. They are very quiet and never talk too much with the strangers. They are really polite, so we often hear they say “Thank you.” or “Sorry.” The gentlemen are also the Englishmen.

The French's holidays are very long. They like traveling and usually spend their long time on staying in other countries. The Frenchmen are more outgoing than the Germans. It is very easy to make friends with them.

    Compared to the Frenchmen, the Americans are more outgoing. And they are even opener than all of the Europeans. They don't like to depend on others. So it is very common that the students do part-time jobs in their free time. And in Americans' eyes, success is an important part in their life.

    It is hard to say the first day of school in the United States because when the first day of school is and what happens on the first day of school usually are different by districts(地区).

    The first day of school for many school districts in different states is on the day after the first Monday in September. In some other school districts, school begins in mid-to-late August. For example, the Denver, Colorado schools go back in mid-August and schools in Cleveland, Ohio start back usually one week before the first Monday in September. The Boston, Chicago, New York City and San Diego schools start back on the Tuesday or Wednesday after the first Monday in September.

    Schools in Cleveland, Ohio used to start the school year on the day after the first Monday in September, but in the 1976-1977 and 1977-1978 academic years, the school year was affected by several bad snowstorms, extreme cold. In the 1978-1979 school year, the Ohio Department of Education moved the start of the year to late August, one week before the first Monday in September. This went into effect in the 1980-1981 school year.

    In most school districts in Utah, the school year starts between August 25 and August 30, and goes until the last week of May or the first week in June next year.

    In American high schools, the freshmen class usually goes back one or two days before the rest of the school body for an orientation(迎新)period. An orientation period helps the freshmen get familiar with their new school, its rules, and surroundings.

    In some schools, the freshmen classes have their photographs taken for identification purposes. Some high schools have tried to make the first week of school fun for incoming freshmen.

People have long watched moths （飞蛾） and other flying insects flock to streetlamps, lights and flames. These insects appear attracted by the light. But a new study suggests they may just lose track of which way is up.

Previous theories say light probably blinds flying insects so that they get trapped by the light, or maybe they interpret light at night as a place to fly for a quick escape. Now the new study suggests flying insects instead turn their backs to the sky's light to keep their feet pointing toward the ground. Insects naturally turn their backs toward light. But when that light is from an artificial source, it may affect their sense of direction, leading to them flying in circles or diving toward the ground.

At a field station in Costa Rica, Samuel Fabian, an entomologist from Imperial College London in England and his teammates set up hanging and standing lights, and then used high-speed cameras to track wild, flying insects including moths and flies. Some circled the lights endlessly, and others flew sharply upward, losing speed until they couldn't fly any higher. When the light source pointed up, some insects turned around and headed for the ground. During the flight, the insects always kept the lights at their back even if they'd end up crashing. Crash landings were common when the team lit up a white sheet on the floor. But not when a white sheet—stretched into a height above the floor—was bathed in diffuse （漫射） light, much as the sky would be, insects flew through the area without getting trapped by the light.

The team also observed some species in a lab. Moths and dragonflies generally behaved like the wild insects, and they kept the light at their backs. However, in the lab, fruit flies, like oleander hawk moths—which can fly in the dark—could fly over LED lights without being thrown off course. In the wild, though, the moths still crashed. Maybe this is because, Fabian says, the insects can sometimes control their response to light, or over time, they might learn to avoid artificial light.

Family Day 2024

Here are some exciting happenings at Ontario Parks this Family Day Weekend: Family Day—Sleeping Giant Provincial Park

February 19

Join park staff at Sleeping Giant this Family Day to enjoy some outdoor activities including ice skating with neighbor campfire, winter hiking or walking, cross-country skiing, and snowshoeing. The visitor centre will be open from 8:30 a.m. to 4:00 p.m.

The park gate will be closed and locked at 4:40 p.m. Don't forget to reserve your vehicle permit in advance!

Family Day—Bronte Creek Provincial Park

February 17

Spend an enjoyable day exploring the park trails, barns (仓棚), and outdoor play equipment. The play barn (for children 10 years and under) will be open from 9100 a.m. to 4:00 p.m. Visit the children's farm with a variety of animals, search for the park's Gnome Road, or climb to the top of the hill and enjoy the views from the canyon scenic observation deck!

Fire and Stars Hikes—Sibbald Point Provincial Park

February 16&17

Visit Sibbald Point this winter for an evening journey along the Maidenhair Fern Trail, lit only by fire and the stars.

Hike between the hours of 6:30—9:30 p.m. on your own or join in a guided hike led by Discovery staff beginning at 6:30 p.m. This journey takes 1-1.5 hours to complete dependent on your hiking pace.

Staff recommend bringing your own snowshoes, but they are optional depending on amount of snow fall. Be sure to check the Snow Report before you arrive!

Family Fishing Weekend

February 17—19

Do you know Canadians can fish licence-free from February 17 to February 19? What a great time to introduce your family to ice fishing! Find an event near you.

Safety should always be number one. Remember: Ice does not freeze at a uniform thickness. Always dress for the weather and layer up. Make sure you obey the rules and regulations of the body of water you're fishing on too!