The Asian elephant has been respected for centuries and is still used today for ceremonies and religious purposes. It is respected, not only because it plays a role in Asian culture and religion, but also because it is a key biological species in the tropical forests of Asia.

    The Asian elephant is the largest land mammal in Asian. It is smaller than the African elephant, with relatively smaller ears. Asian elephants have a single “finger” on the upper lip of the long trunk, while African elephants have a second on the lower tip. A number of adult male Asian elephants have no tooth, and the percentage of males carrying ivory(象牙）is different from only about 5% in Sri Lanka to 90% in south India. Asian elephants keep their ears in constant motion in order to free the heat they produce. The species is reported to have well-developed hearing, vision, and smell , and they are also fine swimmers.

    Asian elephants prefer to convey something to form groups surrounding 6 to 7 related females that are led by the oldest female. Like African elephants, these groups occasionally join others to form herds, although these associations are relatively temporary.

    More than two thirds of the day may be spent feeding on grasses, but large amounts of tree bark, roots, leaves and small stems are also eaten. Crops such as bananas, rice and sugar plants are favored foods. Besides, they need to drink at least twice a day so the source of water is quite important.

    The Asian elephant used to live from modern Irap and Syria to the Yellow River in China at first, but it is now found only from India to Vietnam, with a tiny population in the extreme southwest of China's Yunnan Province. More than 100,000 Asian elephants may have existed at the start of the 20^th century. The population is estimated to have fallen by at least 50% over the last 60-75 years.

    In our daily life, it is necessary to make small talk in some situations. It helps to fill time between people when it is very quiet. You may not feel like talking with someone else or you are very shy at the beginning, but it is sometimes thought to be not polite to say nothing.

    People use small talk almost every day. It usually takes place when you meet someone you don't know at all or someone you're not familiar with. For example, waiters and hairdressers often make small talk with their customers（顾客）. If you happen to be outside when the postman comes to your door, you might make small talk with him, too.

    Most often, small talk happens in places where people are waiting for something. For example, you might talk with another person who is waiting for the bus to arrive. People also make small talk in a doctor's waiting room, or when they are waiting in a line to buy something. At the office, people make small talk in lunch rooms, especially if there is a line-up. Mingling is often required（要求）among people who don't know each other very well at a party. That is to say, they are expected to walk around and talk with others.

    The most common time for small talk to happen is the first time you see or meet someone on a given day. For example, if you see a neighbor in the waiting room of the airport you might say hello and discuss the sports or weather. However, the next time you see each other you might just smile and say nothing. If there is very little noise, it might be the right time to start a pleasant conversation. If someone is reading a book at the bus stop, it is probably not a good idea to start a conversation. Another good time to make small talk is during a break in a meeting when there is nothing important going on. However, it is important to recognize the signal when the other person wants the conversation to stop.

    “Children start putting their fingers in their noses as infants,” says Sarah Springer, MD' of Kids Plus Pediatrics in Pittsburgh. “As soon as they have motor control of their fingers, they'll find holes where their fingers can fit. It's not a worry—just a normal part of how they explore and learn.”

    In order to help your child to stop engaging in the behavior it's important to understand why they may start the habit in the first place, according to the University of Michigan Health System. Nose-picking can be a result of boredom, sleepiness, falling asleep, relaxation or coping. In most instances, nose-picking is likely just a phase（阶段）and the child will eventually quit it.

    There isn't much parents can do to stop the behavior of nose-picking, as it's a normal part of being a kid, Dr. Springer says. Parents are advised to ignore the behavior and not show frustration's this won't help encourage your child to stop picking their nose. Instead, Dr. Springer says to help your child learn to blow their nose once they are four or five years old and talk to your child about keeping their hands clean to avoid spreading germs.

    Take note of the season or climate, too, as dry air or cold can increase the occurrence of nose-picking. Parents should use a humidifier（增湿器）in these conditions to help nasal secretions（鼻分泌物）stay moist. Putting petroleum jelly（凡士林）a few times a day inside the nose can help with irritation and minimize picking.

    Once your child enters school, it's inevitable for them to see and pick up bad habits, Dr. Springer said. Nose-picking is a common habit, even among adults and as children age most will realize it's not an acceptable behavior.

    “Nose picking is a normal part of childhood,” Dr. Springer says. “Most kids will become conscious of the social stigma（羞耻）associated with it, and will eventually stop picking, at least in public.”

    In 1977, a dead author of detective stories saved the life of a 19-month-old baby in a most unusual way. The author was Agatha Christie, one of the most successful writers of detective stories in the world.

    In June 1977, a baby girl became seriously ill in Qatar, near Saudi Arabia. Doctors were unable to find out the cause of her illness with confidence, so she was sent to Hammersmith Hospital in London. She was then only semi-conscious and on the "Dangerously Ill" list. A team of doctors hurried to examine the baby only to discover that they, too, were confused by the very unusual symptoms (症状). While they were discussing the baby's case, a nurse asked to speak to them.

    "Excuse me," said Nurse Marsha Maitlan, "but I think the baby is suffering from thallium (铊) poisoning(中毒)."

    "What makes you think that?" Dr. Brown asked. "Thallium poisoning is extremely rare."

    "A few days ago, I was reading a novel called A Pale Horse by Agatha Christie," Nurse Maitlan explained. "In the book, somebody uses thallium poison, and all the symptoms are described. They're exactly the same as the baby's."

    "You're very thoughtful and you may be right," another doctor said. "We'll carry out some tests and find out whether it's thallium or not."

    Tests showed that the baby had indeed been poisoned by thallium, a rare metallic substance(物质) used in making special glass. Once they knew the cause of the illness, the doctors were able to give the baby the correct treatment. She soon recovered and was sent back to Qatar. Later it was reported that the poison might have come from an insecticide (杀虫剂) used in Qatar.

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    So what is rewilding?

    Imagine our natural homes growing instead of shrinking. Imagine species (物种) diversifying instead of declining. That's rewilding. Rewilding is ecological restoration. Rewilding offers hope for wildlife, humans and the planet.

    Why is rewilding important and necessary?

    Our natural ecology is broken. The places where you would expect wildlife to exist have been reduced to wet deserts. The seabed has been destroyed and there have been no living creatures any more.

    Our wildlife is disappearing. Many wonderful species have declined over the past century. We've lost more of our large animals than any European country.

    We need keystone species. These vital species, including top predators (食肉动物), drive ecological processes. Their loss has worsened our living systems.

    Nature looks after us. Good natural ecology can provide us with clean air and water, prevent flooding and store carbon. Rewilding can leave the world in a better state than it is today.

    What are challenges?

    As a long-term project, our "rewilding britain" has its challenges. Many people are not interested, because we have got used to the lack of native forests. Many farmers oppose the idea. They thought it a crazy idea to bring back predators because they would start killing farm animals. It takes time to educate them. Above all, we need money! So we need your help!

    Make a donation.

    Help us bring back living systems and restore wild nature!

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    In the 1960s, while studying the volcanic history of Yellowstone National Park, Bob Christiansen became puzzled about something that, oddly, had not troubled anyone before: he couldn't find the park's volcano. It had been known for a long time that Yellowstone was volcanic in nature—that's what accounted for all its hot springs and other steamy features. But Christiansen couldn't find the Yellowstone volcano anywhere.

    Most of us, when we talk about volcanoes, think of the classic cone (圆锥体) shapes of a Fuji or Kilimanjaro, which are created when erupting magma (岩浆) piles up. These can form remarkably quickly. In 1943, a Mexican farmer was surprised to see smoke rising from a small part of his land. In one week he was the confused owner of a cone five hundred feet high. Within two years it had topped out at almost fourteen hundred feet and was more than half a mile across. Altogether there are some ten thousand of these volcanoes on Earth, all but a few hundred of them extinct. There is, however, a second les known type of volcano that doesn't involve mountain building. These are volcanoes so explosive that they burst open in a single big crack, leaving behind a vast hole, the caldera. Yellowstone obviously was of this second type, but Christiansen couldn't find the caldera anywhere.

    Just at this time NASA decided to test some new high-altitude cameras by taking photographs of Yellowstone. A thoughtful official passed on some of the copies to the park authorities on the assumption that they might make a nice blow-up for one of the visitors' centers. As soon as Christiansen saw the photos, he realized why he had failed to spot the caldera; almost the whole park-2.2 million acres—was caldera. The explosion had left a hole more than forty miles across—much too huge to be seen from anywhere at ground level. At some time in the past Yellowstone must have blown up with a violence far beyond the scale of anything known to humans.