Danger-junkie orangutans(猩猩) in Borneo climb dead trees and shake then until they begin to fall. They scream with excitement as they cling to the falling tree. Just before the tree hits the ground the orangutans leap to another tree or vine, narrowly escaping death. While no one cab ask orangutans if they enjoy it as a person playing an extreme sport, one animal behaviorist sees this monkey fun as a bit of harmless thrill-seeking.

    A growing number of scientists agree that animals are conscious and capable of experiencing basic emotions(情感), such as happiness, sadness, boredom or depression. A few scientists even see the possibility for higher animal emotions like love, jealousy and spite.

    Five years ago, behaviorist and animal-rights activist Dr. Jonathan Balcombe stood on a Virginia hotel balcony watching two crows intimately groom (清洁) each other in the comfort of an abandoned billboard. He felt that the birds liked what they were doing, even if engaged in a natural, beneficial act, such as picking parasites (寄生虫) off the other's feathers. That moment changed the way he would view animals forever and led to a book, “Pleasurable Kingdom: Animals and the Nature of Feeling Good”, which is filled with hundreds of examples of animals living it up thanks to developed senses of touch, taste, sight, sound and smell.

    Balcombe recounts a favorite example of Kenyan hippos (河马) having high-end spa treatment in a fresh water spring. They splay their toes, open their mouths wide and wait for a school of cleaner fish to remove parasites and slough off dead skin, he recalls. Balcombe knows that the hippos and the fish both benefit from this arrangement. “My interpretation is that it is also enjoyable for them ,” he says.

    Whenever the word “hero” comes to me, I immediately think of three Hs: honorable, hardworking, and happy. When I think more about this word, I picture someone who has accomplished good things for people and tries to do the right thing Hattie Elizabeth Alexander is one person whom I find to be very heroic.

    Hattie was born in Baltimore, Maryland on April 5, 1901. During her time at College she earned her Bachelor's Degree in Bacteriology and Physiology. These were just the first steps towards what she was finally going to be remembered for. After college Hattie attended Johns Hopkins School of Medicine and received her medical degree.

    After her education, she pursued her career, and after much time and hard work, she drastically reduced the number of infants(幼儿) dying from meningitis(脑膜炎). Hattie was very dedicated to her work and helped at as many locations as she could. Spending substantial(大量的) time in the laboratory, Hattie successfully developed a cure against the disease, which decreased the death rate to 20 percent. At the same time, she was also a teacher working with Columbia University.

    She was a caring lady interested in other people's lives. When she was teaching at Columbia University, other members would talk to her about students that were failing their classes, and somehow Hattie could always find convincing reasons as to why they should not be driven away. Later, Hattie became an instructor in Pediatrics at New York City's Babies Hospital. After many honors, she became the first woman president of the American Pediatric Society in 1965. This was her last major achievement, for soon after, Hattie died of cancer on June 24, 1968.

    Hattie is my hero because her positive attitude and strength helped her accomplish great things for others. She gave them her strength by developing medicines against diseased, which, by doing so, made them stronger. This is what makes Hattie Elizabeth Alexander my hero.

    It is 6:00a.m.on the first day of the school year. In Chery brook Technology High School, mathematics teacher Eddie Woo is already at work.

    One of the first things before the first bell rings is to set up his tripod（三脚架）and iPad in the middle of the classroom. “I'm Mr. Woo. I record my lessons. I record all of them. In fact, I'm about to record this one,” he explains to his new maths class.

    He started posting videos online in 2012 for a student who was sick with cancer and missing a lot of school, so he started sharing them across the country and beyond. Wootube now has more than 38,000 subscribes(用户) and has attracted almost 4 million views worldwide.

    Cherybrook Technology High School principal(校长) Gary Johnson said Mr. Woo was helping maths teachers in Australia and making maths popular again. “He has an ability to simplify(简化) maths to a level where kids can really understand it.” Mr. Johnson said.

    12-year-old student Emily Shakespear said Mr. Woo's teaching style made maths easy and interesting. “I don't want to say it, but he sucked me into maths,” she said. Owen Potter, who attends high school in Cobar agreed. “It's difficult to understand how someone in Sydney can influence thousands of people across the whole country,” he said.

    Mr. Woo won the 2017 University of Sydney Young Alumni Award for Outstanding Achievement, and he was one of 12 Australian teachers honored at the Commonwealth Bank Teaching Awards.

    Monkeys seem to have a way with numbers.

    A team of researchers trained three Rhesus monkeys to associate 26 clearly different symbols consisting of numbers and selective letters with 0-25 drops of water or juice as a reward. The researchers then tested how the monkeys combined—or added—the symbols to get the reward.

    Here's how Harvard Medical School scientist Margaret Livingstone, who led the team, described the experiment: In their cages the monkeys were provided with touch screens. On one part of the screen, a symbol would appear, and on the other side two symbols inside a circle were shown. For example, the number 7 would flash on one side of the screen and the other end would have 9 and 8. If the monkeys touched the left side of the screen they would be rewarded with seven drops of water or juice; if they went for the circle, they would be rewarded with the sum of the numbers—17 in this example.

    After running hundreds of tests, the researchers noted that the monkeys would go for the higher values more than half the time, indicating that they were performing a calculation, not just memorizing the value of each combination.

    When the team examined the results of the experiment more closely, they noticed that the monkeys tended to underestimate（低估）a sum compared with a single symbol when the two were close in value—sometimes choosing, for example, a 13 over the sum of 8 and 6. The underestimation was systematic: When adding two numbers, the monkeys always paid attention to the larger of the two, and then added only a fraction（小部分）of the smaller number to it.

    "This indicates that there is a certain way quantity is represented in their brains, "Dr. Livingstone says. "But in this experiment what they're doing is paying more attention to the big number than the little one.”

    Over the past couple of days, on our local Freecycle page there have been a lot of wanted posts, all from the same person, basically asking for everything you'd need to set up a house from scratch.

    One of the things they asked for was a queen-sized bed. At that time we just happened to have an extra one, so I messaged them. They immediately came in the afternoon. The people who came, two ladies and a man, are actually friends of another woman named Jenny who owned a young boy. This woman has escaped from a dangerous, violent relationship and these friends of hers are helping her and her son start over again, with everything from furniture to toothbrushes on their list of needs.

    While they were here, I also gave them one of our spare bookcase and some coffee cups. I even asked them to keep in touch in case they needed anything else—I have a way of connecting people with things. I offered the woman a cupboard we had as well; her friends just needed to see if there was a place and/or a need for it in their friend's new home.

    I was so excited to meet those loving people, who were obviously willing to help their friend. It was clear how protective they felt of this woman and her boy, how much they love her and wanted her to have a happy and safe life, and to spend even a few minutes with people like that is an experience I'll remember for a long, long time.

    A quick thank-you to all who have sent more donations over the last couple of days, as well as lovely messages of thanks and blessings. Sometimes it's hard to keep up with it all, but it's a problem I'm happy to have.

    A growing number of Chinese tourists are helping to save a dying town, after a like-known tourist attraction was featured on a number of Chinese travel blogs.

    The residents of Sea Lake, a town of just 600 people, barely see travelers stop at their gas station while driving by, but the sudden influx of Chinese tourists is helping keep the town's economy alive.

    The tourists come to see Lake Tyrrel—a shallow, salt crusted and often dry lake just out of town. According to a local teacher, Rachel Pearce, the extremely beautiful nightscape combined with the mysterious appearance of stars reflected on the salt lake gives people the impression of walking among the stars. Besides, the town is so far away that no light pollution ruins the particularly attractive views, and as it is situated in a barren(寸草不生的), dry part of the country, there are rarely any clouds to spoil the night sky.

    The attraction's growing sought-after status has resulted in the town's motel rooms being full almost every night, and while local farmers are suffering in a two-year drought, tourism is keeping the town's agricultural-based economy stable.

    Despite the popularity of the town and its attraction, locals are still confused as to why their little town deserves so much attention. Sea Lake's population has fallen from around 1, 200a decade ago to 600 today. "We're still unsure why Lake Tyrrel is such a big, big tourist attraction," one local says. "It's quite a shock."