Chimps will cooperate in certain ways, like gathering in war parties to protect their territory. But beyond the minimum requirements as social beings, they have little instinct to help one another. Chimps in the wild seek food for themselves. Even chimp mothers regularly decline to share food with their children. Who are able from a young age to gather their own food.

In the laboratory, chimps don’t naturally share food either. If a chimp is put in a cage where he can pull in one plate of food for himself or, with no great effort, a plate that also provides food for a neighbor to the next cage, he will pull at random — he just doesn’t care whether his neighbor gets fed or not. Chimps are truly selfish.

Human children, on the other hand are extremely cooperative. From the earliest ages, they decide to help others, to share information and to participate a achieving common goals. The psychologist Michael Tomasello has studied this cooperativeness in a series of expensive with very young children. He finds that if babies aged 18 months see an worried adult with hands full trying to open a door, almost all will immediately try to help.

There are several reasons to believe that the urges to help, inform and share are not taught but naturally possessed in young children. One is that these instincts appear at a very young age before most parents have started to train children to behave socially. Another is that the helping behaviors are not improved if the children are rewarded. A third reason is that social intelligence develops in children before their general cognitive skills, at least when compared with chimps.In tests conducted by Tomtasell, the children did no better than the chimps on the physical world tests, but were considerably better at understanding the social world.

The cure of what children’s minds have and chimps’ don’t in what Tomasello calls what. Part of this ability is that they can infer what others know or are thinking. But that, even very young children want to be part of a shared purpose. They actively seek to be part of a “we”, a group that intends to work toward a shared goal.

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Online schools are becoming very popular today. Whether it is working professionals who cannot afford the time to go to a full-time college because of their huge workload or stay-at-home mums who have many duties and cannot join in a college, online schools are much enjoyed at all. And now, even regular students, who have the time to go to college, are going in for online education, as it leaves them with enough time to pursue other things, such as a part-time job or a hobby, along with studying. However, as with everything, there are both advantages and disadvantages of online schooling.

Let’s start with the positives. These schools cost much less. You don’t have to spend money on buying books or bus fees. Another advantage is the flexibility it provides. You can study at any time during the day. You can study wherever you want---in your house, at a cafe or even in a park.

Move on to the disadvantages of online schooling. Those students who always need a push from their teachers to do well, are very likely not to do well in online schools. And the greatest disadvantage going to school online is that there are many employers who prefer students with a traditional degree to those who have an online degree. The employers feel that students who go to full-time colleges are more knowledgeable compared to those who have online degrees. Since the very purpose of education is to land a person a good job, online degrees, many a time, do not serve this purpose.

No doubt that online schools offer the freedom which no regular college can provide. However how much the employers will value the degrees and whether a student can actually make his own study schedule and most importantly, stick to it, depend upon individuals( AA). So in the end, it can be rightly said, online schools are good for some, while others should give them a skip.

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Why is the world’s population growing？The answer is not what you might think.The reason for the explosion is not that people have been reproducing like rabbits，but that people have stopped dropping dead like flies.In 1900，people died at the average age of 30.By 2000 the average age was 65.But while increasing health was a typical feature of the 20th century，declining birth rate could be a defining one of the 21st.

Statistics show that the average number of births per woman has fallen from 4.9 in the early 1960s to 2.5 nowadays.Furthermore，around 50% of the world’s population live in regions where the figure is now below the replacement level (i.e.2.1 births per woman) and almost all developed nations are experiencing sub-replacement birth rate.You might think that developing nations would make up the loss (especially since 80% of the world’s people now live in such nations)，but you’d be wrong.Declining birth rate is a major problem in many developing regions too，which might cause catastrophic global shortages of work force within a few decades.

A great decline in young work force is likely to occur in China，for instance.What does it imply？First，China needs to undergo rapid economic development before a population decline hits the country.Second，if other factors such as technology remain constant，economic growth and material expectations will fall well below recent standards and this could invite trouble.

Russia is another country with population problems that could break its economic promise.Since 1992 the number of people dying has been bigger than that of those being born by a massive 50%.Indeed official figures suggest the country has shrunk by 5% since 1993 and people in Russia live a shorter life now than those in 1961.Why is this occurring？Nobody is quite sure，but poor diet and above all long-time alcoholism have much to do with it.If current trends don’t bend，Russia’s population will be about the size of Yemen’s by the year 2050.

In the north of India，the population is booming due to high birth rates，but in the south，where most economic development is taking place，birth rate is falling rapidly.In a further twist，birth rate is highest in poorly educated rural areas and lowest in highly educated urban areas.In total,25% of India’s working-age population has no education.In 2030，a sixth of the country’s potential work force could be totally uneducated.

One solution is obviously to import foreign workers via immigration.As for the USA，it is almost unique among developed nations in having a population that is expected to grow by 20% from 2010—2030.Moreover，the USA has a track record of successfully accepting immigrants.As a result it’s likely to see a rise in the size of its working-age population and to witness strong economic growth over the longer term.

Whether you’re looking for a quick hotel in the city or a isolated resort in the tropics, where you choose to stay can make or break your vacation experience. But even the most seasoned travelers may not know the difference between the two main types of homes-away-from-home. Besides their first letter, is there any real difference between hotels and motels?

These two types of lodging(宾馆) have the same basic purpose—a place for travelers to sleep—but there are plenty of features that set them apart. For instance, they came to be for different reasons, and at very different times. The word “hotel” dates back to the 1600s and comes from a French word, hotel. That word, just like the English one, referred to a place that provides lodging, meals, entertainment, and other services to travelers.

Motels, on the other hand, are a much more recent—and pretty much exclusively American—lodging option. This word dates back to the 1920s and combines the words “hotel” and “motor.” As America’s major highway system developed, so did motels, filling the need for roadside stops for motorists traveling cross-country.

There are also some smaller differences that can help you figure out which type of place you’re in. Hotels tend to be built for longer stays, while motels are geared more for one- or two-night stops along a journey. Because of this, hotels are much more likely to have offerings like lounges, gyms, and entertainment.

So, in the end, it comes down to what you want from your trip and from your lodging. Want the place you stay to be just as much a part of your travel experience as anything else? Opt for a hotel. Just need a place to pop in and out of to shower and sleep? A motel might be the better choice.

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