In the frozen continent of Antarctica scientists fear an alien invasion — not from outer space, but carried in people's pockets and bags.

    Seeds and plants accidentally brought to Antarctica by tourists and scientists may introduce alien plant species which could threaten the survival of native plants in the finely balanced ecosystem.

    “The people that were carrying the most had lots and lots of seeds. They really were real threats,” said Dana Bergstrom, from the Australian Antarctic Division.

    “When we take things in through hitchhiking（搭车旅行） then we get species which are competitive. The plants and animals there are not necessarily competitive, so we'd start losing various precious biodiversity（生物多样性） on the (Antarctic) continent”, Bergstrom told Reuters.

    Amongst the alien species discovered were the Iceland Poppy, and Annual Winter Grass — all from cold climates and capable of growing in Antarctica.

    The Antarctic Peninsula, where most tourists travel, is now considered a “hot spot” on the frozen continent and the warmer the climate, the easier for seeds to grow. “The peninsula(半岛) is warming at some of the greatest rates on the planet,” said Bergstrom.

    The study, the first continent-wide assessment of invasive species in Antarctica, surveyed about 1,000 passengers during 2007-2008, the first year of the International Polar Year, an international effort to research the polar areas.

    Bergstrom said the one alien seed that had gained a foothold is Annual Winter Grass. It is a strong weed in the sub-Antarctic and is on the Antarctic island of King George. It has also made its way to the tail part of the Antarctic continent.

    The Winter Olympics are also called The White Olympics. At this time, many colorful stamps are published to mark the great Games. The first stamps marking the opening came out on January 25th,1932 in the United States for the 3rd White Olympics. From then on, publishing stamps during the White Olympics became a rule. During the 4th Winter Olympics, a group of stamps were published in Germany in November 1936. The five rings of Olympics were drawn on the front of sportswear. It was the first time that the rings appeared on the stamps of the White Olympics.

In the 1950's, stamps of this kind became more colorful. When the White Olympics came, the host countries as well as the non-host(非主办方)countries published stamps to mark those Games. China also published four stamps in February 1980, when the Chinese sportsmen began to take part in the White Olympics.

    Japan is the only Asian country that has ever held the White Olympics. Altogether 14,500 million stamps were sold to raise money for this sports meeting.

    Different kinds of sports were drawn on these small stamps. People can enjoy the beauty of the wonderful movements of some sportsmen.

    Valerie Jarrett, 58, is serving as a top adviser to President Obama and has been close to the first family since the early 1990s. Joe Heim from WashingtonPost had an interview with her.

    Joe Heim: What do you think of a reporter who interviews you for 25 minutes, then later finds out his recorder stopped working and asks you to do the interview again?

    Valerie Jarrett: That he's human. Everybody could make mistakes.

    Joe Heim: You're considered the president's closest adviser. What do you think the role of an adviser is?

    Valerie Jarrett: I think so as that the president's management style is very effective (有效的), all of his advisers should speak openly about their advice.

    Joe Heim: What misunderstandings are there of you?

    Valerie Jarrett: A little-known fact is that I started my life very shy and remained very shy well into adulthood. Painfully shy, I would call it. And I often share this, particularly with young people, because it's something I really had to work hard to overcome. And for all the shy people out there I say, you, too, can overcome it. But it took a lot of hard work on my part, and I discovered along the way that just because you're nervous and you have butterflies in your stomach doesn't mean that it has to show. My point in sharing it with you is that part of life is pushing yourself outside of your comfort zone (舒适区). And if you're going to grow, you have to learn how to take on new challenges that you might not be good at.

    Joe Heim: Will you stay until the end of his term?

    Valerie Jarrett: I serve at the pleasure of the president. If he wants me to stay, I will.

    How's your happiness quotient (指数)? Science tells us that if you want to increase your "happiness quotient" every day, it's important to take time and accept the present blessings (恩赐) in your life.

    I wanted to share a moment of feeling about some of my blessings and what's in my life to be grateful for as Thanksgiving approaches.

    One of our family traditions at our Thanksgiving meal is to go around the table and to let each one share something we're especially thankful for.

    I'm going to recite lots of things, including that I'm grateful for my health, my loving husband, and the wonderful relationship we share. My husband joins me for 3-mile walk to start our day. The exercise habit keeps our moods in check and the ups and downs of life easier to manage. We talk as we walk, sharing ideas, worries and good feelings too. Sometimes we argue a little until we figure out what to do. We always come up with something. What a blessing that is!

    It is so much to be grateful for. I feel I am the luckiest woman alive. It's my wish for you that you'll be able to spot something in your life. I hope yet you will savor (体味) and appreciate it.

    Many of us spend the holiday with our aging parents or other loved ones. In my work at AgthgParents.com, we just reminded everyone that you never know if there will be another Thanksgiving with these loved ones. We can't take the day for granted. Just be in the moment. We suggest that you verbally give thanks to your parents, no matter what conditions your aging parents may be in now. Do what you can to be tuned in to what you need as well as what your family needs.

    The 2019 Beijing Horticultural Expo, the largest of its kind, has chosen the theme "Live Green, Live Better". The expo, opened on April 29 in Yanqing District of Beijing, is scheduled to last for 162 days until October 7.

    Tickets available

    *Standard day ticket

    *Designated day ticket

    *Discounted ticket

    *Group ticket

    Designated days

    *Labor Day holiday (May 1-4)

    *Dragon Boat Festival holiday (June 7-9)

    *Mid-Autumn Festival holiday (Sept 13-15)

    *National Day holiday (Oct 1-7)

    Tickets prices

    *Standard day ticket: 120 yuan

    *Ordinary designated day ticket: 160 yuan

    *Discounted standard day ticket: 80 yuan

    *Discounted designated day ticket: 120 yuan

    Tickets are free for children under the age of six or shorter than 130 centimeters. Discounted tickets are available for those with disabilities, seniors (people aged at 60 or above), children, students and PLA soldiers.

    Where to buy

    Visitors can buy or book tickets from two online agents, seven travel agencies, or three event channels—the event WeChat account, the event app or Onsite ticket kiosks.

Opening hours

Requirements

    Buying tickets for Expo 2019 Beijing requires real-name registration, and all visitors are required to input information from their ID cards (or valid passports, mainland travel permits for Hong Kong and Macao residents, and mainland travel permits for Taiwan residents) to buy or book tickets online.

    A few weeks ago, a 71-year-old man pulled his car to the roadside in Northwest Portland and stopped. He rolled down the window, turned off the engine and stared at a house.

    The place, distinguished by three gables, is partially hidden by hedges and trees. Most people who pass by would never notice it. And if they did give it a glance, they'd probably think it's a nice house in a nice neighborhood. Nothing more.

    The house, in the 2500 block of Northwest Westover Road, is known as the Bessie & Louis Tarpley House. Built in 1907, it's listed on the National Register of Historic Places.

    The current owner is Barbee Lyon, 79.

    He and his first wife took possession in 1975. When they divorced, he bought out her share.

    A retired lawyer, Lyon learned Louis Tarpley, the home's first owner, had also been a Portland lawyer. Setbacks in Tarpley's life led to the house auction(拍卖) in the late 1920s.

    "I'm only the fifth owner of the home," Lyon said.

    A previous owner was Frank Masco.

    He and his wife, Esther, and their nine children had lived across town in a tiny house needing constant repairs. In the mid-1950s, the elder Masco wanted to move to a bigger house and one closer to work. A docker (码头工人), he was on-call 24 hours a day and had to quickly get to the Willamette River docks.

    He found a home on Westover Road. At the time, many people wanted to live in new construction in the suburbs. The Westover house was offered at a deep discount.

    And later the family moved on several times, finally living in Vancouver.

    One Sunday in July 2019, Charley Masco drove to Portland for an appointment at a computer store. When it ended, he traveled the familiar route to Westover Road, pulled over and looked at that home.

    He decided to do something bold. He got out of his car and walked up the steps and rang the doorbell. He waited. No response. Nervous, he thought it was a mistake to do this and considered turning around and walking back to his car.

Barbee Lyon opened the door and saw a stranger.

    "I'm not selling anything," Masco said quickly. "I just want you to know I once lived here."

    Lyon opened the door wide.

    "Come in."

    And for the first time since 1966, Masco stepped into his childhood home.

    Every room looked as Masco had remembered it: The built-in china hutch in the dining room, the hanging lights above the table and, in the kitchen, a massive wood-burning stove where his mother used to cook family meals. It was as if he had walked into his own museum.

    Lyon told Masco he'd never done major structural remodeling, which meant Masco knew his way around the home.

    It was as if he had never left.

    There, on the top floor, was the window he and his siblings quietly opened to sneak out at night and return before their parents knew they were gone. The loft where friends daydreamed about the future. The living room – no TV ever allowed – where the family gathered to share music, play cards or just talk with each other.

    Then they all walked to the basement.

    In the far corner, Masco saw his father's old wooden workbench. And above it, baby food jars. Masco had forgotten about them.

    He explained that his father had nailed lids from the jars to a rafter, filling the glass with different size screws, nuts and bolts, and then screwing the jars back into the lids to give him easy access while working.

    Masco thought about his father, his mother and three of his siblings who have died. He thought about his father, tinkering in the basement, while his mother was in the kitchen preparing dinner.

    He thought about the 71-year-old man he was and the boy he had once been.

    Kruse, Lyon's wife, reached up and unscrewed a jar. She handed it to Masco, believing it belonged to this stranger.

    Masco thanked her.

    He clutched the small bottle to his chest.

    "My dad," he said quietly. "This is my dad."