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CaliforniaCondor's Shocking Recovery

      California condors are North America's largest birds, with wing-length of up to 3 meters. In the 1980s, electrical lines and lead poisoning(铅中毒) nearly drove them to dying out. Now, electric shock training and medical treatment are helping to rescue these big birds.

      In the late 1980s, the last few condors were taken from the wild, and there are now more than 150 flying over California and nearby Arizona, Utah and Baja in Mexico.

Electrical lines have been killing them off. “As they go in to rest for the night, they just don't see the power lines,” says Bruce Rideout of San Diego Zoo. Their wings can bridge the gap between lines, resulting in electrocution(电死) if they touch two lines at once.

So scientists have come up with a shocking idea. Tall poles, placed in large training areas, teach the birds to stay clear of electrical lines by giving them a painful but undeadly electric shock. Before the training was introduced, 66% of set-freed condors died of electrocution. This has now dropped to 18%.

Lead poisonous has proved more difficult to deal with. When condors eat dead bodies of other animals containing lead, they absorb large quantities of lead. This affects their nervous systems and ability to produce baby birds, and can lead to kidney(肾) failures and death. So condors with high levels of lead are sent to Los Angeles Zoo, where they are treated with calcium EDTA, a chemical that removes lead from the blood over several days. This work is starting to pay off. The annual death rate for adult condors has dropped from 38% in 2000 to 5.4% in 2011.

Rideout's team thinks that the California condors' average survival time in the wild is now just under eight years. “Although these measures are not effective forever, they are vital for now,” he says. “They are truly good birds that are worth every effort we put into recovering them.”

    After giving a talk at a high school,I was asked to pay a visit to a special student.An illness had kept the boy home,but he had expressed an interest in meeting me.I was told it would mean a great deal to him,so I agreed.

    During the nine-mile drive to his home,I found out something about Matthew.He had muscular dystrophy（肌肉萎缩症）.When he was born,the doctor told his parents that he would not live to five,and then they were told he would not make it to ten.Now he was thirteen.He wanted to meet me because I was a Gold-medal power lifter,and I knew about overcoming obstacles and going for my dreams.

    I spent over an hour talking to Matthew.Never once did he complain or ask,"Why me?"He spoke about winning and succeeding and going for his dreams.Obviously,he knew what he was talking about.He didn't mention that his classmates had made fun of him because he was different.He just talked about his hopes for the future,and how one day he wanted to lift weights with me.When we had finished talking,I went to my briefcase（公文包）and pulled out the first gold medal I had won and put it around his neck.I told him he was more of a winner and knew more about success and overcoming obstacles than I ever would.He looked at it for a moment,then took it off and handed it back to me.He said,"You are a champion.You earned that medal.Someday when I get to the Olympics and win my own medal,I will show it to you."

    Last summer I received a letter from Matthew's parents telling me that Matthew had passed away.They wanted me to have a letter he had written to me a few days before:

Dear Dick,

    My mum said I should send you a thank-you letter for the picture you sent me.I also want to let you know that the doctors tell me that I don't have long to live any more,but I still smile as much as I can.I told you someday that I would go to the Olympics and win a gold medal,but I know now I will never get to do that.However,I know I'm a champion,and God knows that too.When I get to Heaven,God will give me my medal and when you get there,I will show it to you.Thank you for loving me.

Your friend,

Matthew

    There's no doubt that our character has a profound effect on our future What we must remember, however, is not merely how powerful character is in influencing our fate, but how powerful we are in shaping our own character and, therefore, our own fate. Character may determine our fate, but character is not determined by fate.

    It's a common mistake to think of character as something that is fully formed and fixed very early in life. It calls to mind old proverbs like "A leopard can't change its spots." and "You can't teach an old dog new tricks."

    This perspective that our character is "etched in stone" is supported by a great deal of modern psychology emphasizing self-acceptance. As Popeye says, "I am what I am." The hidden message is: Don't expect me to be more, better, or different.

    Ultimately (最后), these views of humanity totally undervalue the lifelong potential for growth that comes with the power of reflection and choice.

    How depressing it would be to believe that we can't choose to be better, more honest, more respectful, more responsible, and more caring. None of us should give up the personal seeking to improve our character. Not because we're bad, we don't have to be sick to get better, but because were not as good as we could be.

    There are so many things in life we can't control, whether we' re beautiful or smart, whether we have good parents or bad, whether we grow up with affirmation (肯定) or negation. It's inspiring to remember that nothing but moral will power is needed to make us better.

    No it isn't easy. But if we make a great effort to become more aware of the habits of heart and mind that drive our behavior, we can begin to place new emphasis on our higher values so that we become what we want our children to think we are.

    She was returning from teaching out in a small community. It was a black, moonless night, and a heavy snow was falling.

    She thought back to the time when she had first started teaching out in small communities. During those days she had always picked up hitchhikers (搭便车者), until the day her sister told her that one of her friends had been shot in the head by a hitchhiker, all because she had stopped out of kindness to help him during a storm.

    Her family didn't stop worrying about her safety over the hitchhikers until the family heard the promise: “No more hitchhikers!” The snow that night was making her think back to this.

    Then she saw a man waving. She slowed down for him, but as he ran toward the car in the dark, she shook with fear. Yet she thought that if he was truly in need, she couldn't leave him here in this storm.

    The stranger explained that his car was dead, and she told him to get in. They drove for an hour into the next city and she took him to a convenience store. She waited until he had made a call. When he reported back to her that a family member would soon come to pick him up, she wished him well and then left.

    Tears fell on her cheeks as she drove away. It felt as though she had been holding her breath for an hour.

    “I hope they'll understand why I had to break my promise,” she thought.

    Since the sex of a sea turtle(海龟)is determined by the heat of sand hatching the eggs, scientists had suspected they might see slightly more females. Climate change, after all, has driven sea temperatures higher, which, in these creatures, favors female children. They found female sea turtles from Raine Island, the Pacific Ocean's largest and most important green sea turtle living area, now outnumber males by at least 116 to 1. "This is extreme," says turtle scientist Camryn Allen.

    Biologist Michael Jensen wanted to know if climate change had already changed turtles' sexes. By using genetic(基因的) tests, he'd figured out that he could follow turtles of all ages. Still, his research data would lack an important detail: sex. Only after a turtle matures is it possible to tell its sex from the outside -- mature males have slightly longer tails. By then turtles can be decades old, so scientists often use Iaparoscopy(腹腔镜检查)，sending a thin tube into each animal, but that's not so practical if you're hoping to examine hundreds of creatures. Fortunately, at a turtle conference, he met Allen, and all she needed was a little blood.

    They compared their results with temperature data for nesting beaches. What worries them is that Raine Island has been producing almost female turtles for at least 20 years. This is no small thing. More than 200,000 turtles come to nest there. During high season, 18,000 turtles may settle in at once. "But what happens in 20 years when there are no more males coming up as adults? Are there enough to maintain the population?" says Allen. They also found cooler beaches in the south are still producing males, but that in the north, it's almost entirely females hatching. These findings clearly point to the fact that climate change is changing many aspects of wildlife biology.

    But how widespread is this phenomenon -- and what is the consequence?

    Technology makes listening to holiday music easier than ever. There are endless sources to help you find your favorite Christmas tunes and many other songs. People have explored how to listen to holiday music with high-tech devices (设备).

    Apple Music

    This is the first year you can use Apple Music to listen to holiday songs. Apple  Music has more than 30 million songs and is available (可获得的) in over 100 countries.

    Tell voice assistant Siri to "play holiday music" to open the music program on your iPhone, iPad or Apple TV. Have an Android phone? Apple Music app is available in the Google Play store, but not with a voice assistant. For the first three months, you can use it for free. After that, users have to pay a subscription (订购) fee.

    Google Play Music

    Google Play Music is also in the holiday spirit. Go to the Google Play Music Holiday page and search for "holiday music."

    Google Play Music is available for free if you don't mind the advertisements. If you do, buy a paid subscription to avoid them. Google Play Music offers more than 30 million songs from 58 countries.

    Tune In Radio

    Listen to radio stations with Tune In Radio. This is an online service and offers stations from all seven continents in the world, including Antarctica. Tune In Radio is available on your computer and is free to online users. In the United States, Britain and Canada, a paid subscription gives you more stations without advertisements.

    If you want to know more, please click here.