On February 6, Space X, a private US aerospace company owned by Elon Musk, has successfully launched its new Falcon Heavy spacecraft, making it the world's most powerful rocket.

    Falcon Heavy is the largest rocket since the retirement of NASA's Saturn V, which was used for the Moon missions in the 1970s. “Falcon Heavy can launch about 64 tonnes into low Earth orbit-that's almost three times more than the current running biggest launch vehicle, Delta IV Heavy, ”Imperial College astrophysicist David Clements told AI Jazeera. According to Space X, Falcon Heavy can lift into orbit a mass greater than a 737 jet loaded with passengers, crew, luggage and fuel.

    The rocket was designed with the idea of earning humans into space and opening the possibility of flying missions with people to the Moon and even Mars. For its first voyage, it carried Musk's $ 100,000 cherry-red Tesla sports car and a fake space-suited human model fixed in the driver's seat. Musk joked that “it may be discovered by some future alien race”.

    Falcon Heavy went into space on its last flight on February 6. The launch took place at NASA's Cape Canaveral Air Force Station and Kennedy Space Center in the US state of Florida, the spot also used for the Apollo 11 Moon mission and several space shuttle launches. It was delayed by several hours because of high winds in the upper atmosphere. Minutes after take-off, the two outer boosters (助推器) landed at the nearby Cape Canaveral Air Force Station.

    Space X announced plans to eventually use Falcon Heavy to launch two paying space tourists on a trip around the Moon. However, Musk said he will probably reserve that mission for another launch system, the BFR. Recently, Space X scheduled to launch a Falcon 9 rocket for NASA's TESS mission on March 20, 2018. It is reported that Space X is scheduled to complete 30 independent launch missions in 2018, at least half of which will use Falcon 9.

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    Modern fathers spend an average of six and a half hours a week playing with their children. A study said this equals 338 hours a year, or just over 14 days, three whole days more fun time than their own fathers spent with them.

    The report said modern parents are ''adventurous”, as many encourage their children to play outside. A third of parents also prefer family trips which encourage children to learn new skills, and most say that having fun together improves family ties. The study said the lack of time that today's parents shared with their own dads encouraged them to be more active with their children.

    Dr. Amanda Gummer, psychologist and founder of Fundamentally Children, a company which provides advice on child development, said being adventurous helps children. She said, “Being adventurous from an early age helps children develop important skills that will last throughout childhood and set them up for a healthy and successful adulthood.”

    Outdoor activities are a popular choice for dads and their children, with 40 percent choosing nature trails and 26 percent looking for wildlife, while 13 percent say their top outdoor activity is climbing trees. The simple things are the most popular, with 46 percent going to the park and 41 percent choosing to kick a ball around their children.

    Dr Gummer said, “Children are able to challenge themselves by being more adventurous, and they can be safe in the knowledge that their dad will be there to help if things start getting out of control. Parents can help encourage their children's adventurous, outdoor spirit with wildlife treasure hunts and adventure playgrounds. They can even do more exciting things, like going on camping trips.

    With more than 100,000 people aged 100 or over, Spain is the country with the greatest life expectancy after Japan. How do you live to 100? Here 4 of the country's centenarians (百岁老人) give their advice on staying youthful.

Francisco Nunez, 112

    He is from Bienvenida, Badajoz, southern Spain. Nunez lives with his daughter. He says he doesn't like the pensioners' (领养老金的人) daycare center because it's full of old people, whose negative attitude towards life affects him deeply sometimes. Despite his old age. he has always maintained (保持) a youthful outlook, and that is what has kept him going on.  Pedro Rodriguez, 106

    He lives in Cangas de Onis, Asturias, northern Spain. Rodriguez plays the piano every day in the living room of the flat where he lives with his wife who is nearly 20 years younger than him. Their daughters visit them often. His hobby is something that he feels has kept him young. "The nuns (修女) taught me how to play the piano as a child," he says.

    Maximino San Miguel, 102

    He lives in Leon, northern Spain. San Miguel discovered his passion (酷爱) for amateur dramatics at the age of 80 and has participated in many local productions. He didn't go to school as a child because he was sent to work as a shepherd (牧羊人). He prefers reading books about drawing and traveling. Now this hobby, he said, has kept him full of energy.  Pilar Fernandez, 101

    She lives with her daughter Pili, granddaughters Flori and Ana in Ambas, Asturias, northern Spain. Fernandez suffered hunger and hardship during the war years alongside her nine brothers and sisters. To avoid history repeating itself, she limited herself to just one child. "From pure fear, I didn't have anymore," says Fernandez. One of the best things for her health, she says, is tending livestock (家畜) and a vegetable garden.

    Travis is the manager of G&G where he is responsible for forty employees (雇员)and profits (利润) of over $2 million per year. He's never late to work. He does not get upset on the job. When one of his employees started crying after a customer screamed at her, Travis took her away. "Your working uniform is your shelter," he told her. "Nothing anyone says will ever hurt you. You will always be as strong as you want to be."

    Travis picked up that lecture in one of his G&G training courses, an education program that began on his first day and continues throughout an employee's occupation. The training has, Travis says, changed his life. G&G has taught him how to live, how to focus, how to get to work on time, and how to master his emotions (情绪). Most importantly, it taught him willpower.

    At the center of that education is an extreme focus on an all-important habit; willpower. Dozens of cases show that willpower is the single most important habit for a person's success.

     And the best way to strengthen willpower is to make it into a habit. "Sometimes it looks like people with great self-control aren't working hard—but that's because they've made it automatic," Angela Duckworth, one of the University of Pennsylvania researchers said. "Their willpower occurs without them having to think about it."

     The company spent millions of dollars developing programs of study to train employees on self-control. Managers wrote workbooks that serve as guides to how to make willpower a habit in workers' lives. Those courses arc, in part, why G&G has grown from a sleepy company into a large one with more than seventeen thousand stores and profits of more than $10 billion a year.

    I was driving my newly acquired motorcycle across the vastness of North Dakota when all of the sudden it froze up on the road. I would later be told the belt had slipped and this caused one of the pistons(活塞)to break a cylinder(气缸)head, or something like that.

    Anyway, I sat on the side of the road for what seemed like hours. I even pretended to have been in an accident, which didn't help. Finally, a young man pulled over and offered me a ride, but given that he already had two motorcycles in the back of his truck, he could only take me.

    He drove me to the next town, where I asked to be dropped off Rather than drop me off, he waited while I asked around if anyone could help me to pick up my motorcycle. One elderly gentleman was working and said that I could use his pickup! Can you imagine that a stranger gave me the keys to his pick up. It was quite an experience, I must say. So, as I drove back 20 miles to get my motorcycle, the gentleman who first stopped to help me followed me. We both put the motorcycle in the back of the truck and then I followed him another 50 miles or so and we both unloaded the motorcycle at his place. Then, he followed me back to the small town so I could return the man's truck. I didn't have much cash on me, maybe $40, but I gave it to the man for the use of his truck.

    Two strangers helped rescue me from spending the night on the side of the road in ND. I don't recall their names, but when I close my eyes I can see their faces as if it were yesterday. Thank you, strangers. You may be reading this right now.

    All across the nation, in Americans' backyards and garages and living rooms, wild animals kept as pets live side by side with their human owners. It's believed that more exotic animals live in American homes than are cared for in American zoos. The exotic-pet business has drawn criticism from animal welfare advocates and wildlife conservationists alike, who say it's not only dangerous to bring wildlife into households but it's cruel and criminal. Yet the issue is far from black or white.

    The term exotic pet has no firm definition. It can refer to any wildlife kept in human households or simply to a pet that's more unusual than the common dog or cat. Privately owning exotic animals is currently permitted in a handful of states with no restrictions in America. Adam Roberts of Born Free USA keeps a running database of deaths and injuries caused by exotic-pet ownership: In Connecticut a 55-year-old woman's face was permanently disfigured by her friend's lifelong pet monkey; in Ohio an 80-year-old man was attacked by a 200-pound kangaroo；in Nebraska a 34-year-old man was strangled(勒) to death by his pet snake. And that list does not include the number of people who become sick from coming into contact with zoonotic(动物传染的) diseases.

    Some people see wild animals as pets as a way to connect with the natural world. Other exotic-pet owners say they are motivated by a desire to preserve threatened species. They believe climate change and human population growth could wipe out a species in record time, so having a backup population is a good idea.

    But some groups like Born Free USA and the World Wildlife Fund say that captive breeding(圈养) of endangered species by private owners—whether for commercial, conservation, or educational reasons—serves only to continue a booming market for exotic animals. That, in turn, results in a greater risk to animals still living in their natural habitat.