A dog’s mind is only equal to that of a two-year-old baby. 【小题1】 Therefore, they are probably the first to notice any change in the behavior of their masters. Let’s do some deep-digging to understand the amazing ability of a dog.

They sense your feelings. Isn’t it strange? 【小题2】 This is true. A study published in the Animal Cognition journal says that dogs are known to come to people who appear sad or depressed. It doesn’t matter if the person is their owner or a stranger. They have an ability to sense sadness and are attached to troubled souls.

【小题3】 Dogs can easily tell when you’re playing with favorites, and if you reward or play more with other pets, your dog might notice it and feel uncomfortable. As they can’t say how they feel, they will scratch, yawn or lick their mouths.

They smell fear. Let’s say you’re faced with your worst fear. Would you get scared and run away or just face it? Before choosing how to deal with it, you should remember one thing. 【小题4】 Research shows that dogs often sense their masters’ responses in dangerous situations. If you fear something and choose to back away, chances are that your pet is going to do the same thing.

They’re watching you. We are all raised as respectable individuals who are taught to respect elders, obey the law and help out people in need from time to time. 【小题5】 But if you have a dog at home, it is time to be serious about them. Dogs like generous people. So just be careful around your pet; it may judge you on how you behave with others.

The state of the world’s plants is not strong. One in five plant species faces the risk of disappearance, according to a report. And such loss of plant variety could have destructive influences on our own plant uses.

“Plants are extremely momentous to human beings,” said Kathy Willis, science director at the Royal Botanic Gardens at Kew in London, who led the new report. “Plants provide us with everything--- food, fuel, medicine, and they are unbelievably important for our climate controlling. Without plants we would not be here.”

The good news is that deforestation rates around the world have decreased to a great extent since the 1950s. However, this first-ever report on the health of plant species around the world shows that there is much more to be done.

The report, named the “State of the World’s Plants”, estimates that there are now about 390,900 plant species known to science. And some 21 percent of those plants are in danger of disappearance. “The positive side is that we’re still discovering lots of new plants, about 2,000 each year, new plants for food, for fuel and for drugs,” said Dr Willis. “The bad side is that we’ve seen a huge change in land cover, mainly driven by cultural activity, with a little bit of climate change in there as well.”

Human activity has a significant effect on the risk of plant disappearance. As humans cut down forests to clear space for agriculture, towns and cities, vast stores of biodiversity (生物多样性) are lost.

Losing the diversity of plants could also be a problem for human use. Not only could this affect our own food supply directly, it could also affect the food web. If a plant-eating animal loses some of its food supplies, that change could affect the food chain.

Bats have long been one of the most feared creatures in the animal kingdom. Many pop culture associations with them are related to vampire men (吸血鬼) attacking women in order to suck their blood or witches putting evil curses on innocent individuals.

Although these associations are complete misunderstandings, bats do have a dark side as a dangerous disease medium. These flying mammals can carry a number of fatal diseases such as rabies and more recently Ebola. This has led many to wonder why we should even care about them.

Sure, there is good reason to be extremely cautious if you come into contact with bats. However, there is no denying the fact that bats play a significant role in maintaining a balanced ecosystem.

Many organic farmers have learned about the benefits of having bats nearby to help do away with amounts of pests that show up without pesticides. One brown bat, about the size of a human thumb, can consume about 600 mosquitoes and other unwanted insects within an hour. They make for a fantastic, almost essential, addition to pest management on any farm.

Even large government organizations have realized the economic benefits of bats. The United States Geological Survey estimates that bat contributions to pest management save the country at least 3.7 billion dollars per year. Without them, we would likely experience a dramatic drop in food production, which would eventually make its way into our weekly grocery bills.

As if this were not enough of an ecosystem service we receive, bats are also of great importance to a variety of plant species that are preferential to its pollination (授粉). Otherwise, these plants would decrease their ability to reproduce by at least 50 percent. A number of plant products consumed by humans fall into this preferential pollination category. Some popular foods include mangoes, bananas, peaches and guavas. Additionally, the agave plant, which is used to make tequila, is completely dependent on bat pollinators for reproduction.

Bats are major contributors to our society. These assets are in the best interest of the international community to protect and even to promote. Among significant fears housed by the general public, the fact is that we need them more than most of us imagine. And that’s why should take some measures.