Polar bears are one of the most popular animals for people. Polar bears are different from every other bear in the world. This is because polar bears have white fur. However, there are many facts about polar bears that people might not be aware of .

    The skin of polar bears is black, which according to thinkquest.org allows them to absorb more heat from the sun. Polar bear fur is transparent , because it is made up of hollow guard hairs. Loc.gov explains that the reason polar bears display white fur is that when the sun hits the fur ,the hollow spaces in the hair scatter the light. Since none of the light is absorbed, the light reflected back appears white to human eyes.

    Polar bears' conservation status is considered close to extinction. Global warming is considered the main cause of the decline in polar population. Polar bears use ice floats to hunt for their food. However, these ice floats are melting so polar bears are starting to drown in the search for food, and the food is becoming more difficult to get. Contrary to popular belief, polar bears do not eat penguins, because polar bears are not found in the Antarctic region of the world. Polar bears are only found around the Arctic Circle. Polar bears do not drink water. They get all the water they need from the prey they eat.

    FES. Gov specifies that polar bears are considered the largest land carnivores(食肉动物) in the world. The polar bear weight ranges between 700--1,500 pounds. Since the polar bear habitat is melting away, their main evolutionary advantages are fading. Polar bears are not able to use their camouflage(伪装) to find prey in habitats not covered with snow. Polar bears do not hibernate(冬眠). However, when the weather gets uncomfortable, or mothers give birth, polar bears will dig themselves a hidden home.

    What can we do to help save the polar bears? We can donate to organizations like the World Wildlife Fund, reduce our carbon footprint, and send letters to politicians explaining to them that we need to set up more preserves to help save the polar bear habitat.

    Starting the day on an egg could keep your blood pressure under control, research suggests. Scientists have shown that eggs produce proteins with a function similar to that of powerful blood pressure-lowering drugs.

    The research, from the University of Alberta in Canada, showed that when eggs come in contact with stomach enzymes (酶) they produce a protein that acts in the same way as Ace inhibitors, but more work is needed to show the effects outside a lab and in the human body.

    Earlier this month, British researchers declared that, contrary to popular beliefs, it is healthy to go to work on an egg. They concluded that the type of cholesterol (胆固醇) found in eggs has little effect on increasing heart disease risks.

    Researcher Professor Bruce Griffin, from the University of Surrey, said, "The wrong beliefs linking egg eating to high blood cholesterol and heart disease must be corrected. The amount of fat in our diet has an effect on blood cholesterol that is several times greater than the relatively small amounts of cholesterol found in eggs. The UK public do not need to be limiting the number of eggs they eat. They can be encouraged to include them in a healthy diet as they are one of nature's most nutritious foods."

    The British Heart Foundation dropped its three-egg-a-week limit in 2005. However, almost half of Britons believe the limit still applies.

    Low-Cost Gifts for Mother's Day Gift

    Gift No. I

    Offer to be your mother's health friend. Promise to be there for any and all doctor's visits whether a disease or a regular medical check-up. Most mothers always say “no need,” another set of eyes and ears is always a good idea at a doctor's visit. The best part ? This one is free.

    Gift No. 2

    Help your mother organize all of her medical records, which include the test results and medical information. Put them all in one place. Be sure to make a list of all of her medicines and what times she takes them. “Having all this information in one place could end up saving your mother's life,” Dr. Marie Savard said.

    Gift No. 3

    Enough sleep is connected to general health conditions. “Buy your mother cotton sheets and comfortable pillows to encourage better sleep,” Savard said. “We know that good sleep is very important to our health.”

    Gift No. 4

Some gift companies such as Presents for Purpose allow you to pay it forward this Mother's Day by picking gifts in which 10 percent of the price you pay goes to a charity (慈善机构). Gift givers can choose from a wide variety of useful but inexpensive things —- many of which are “green” —- and then choose a meaningful charity from a list. When your mother gets the gift, she will be told that she has helped the chosen charity.

    To err is human. To blame the other guy is even more human.

    Common sense is not all that common.

    Why tell the truth when you can come up with a good excuse?

    These three popular misquotes(误用的引语) are meant to be jokes, and yet they tell us a lot about human nature. To err or to make mistakes, is indeed a part of being human, but it seems that most people don't want to accept the responsibility for the problem. Perhaps it is the natural thing to do. The original quote about human nature went like this, "To err is human, to forgive is divine(神圣的)."This saying mirrors an ideal: People should be forgiving of others' mistakes. Instead, we tend to do the opposite -- find someone else to pass the blame on to. However, taking responsibility for something that went wrong is a making of great maturity(成熟).

    Common sense is what we call clear thought. Having common sense means having a good general plan that will make things work well, and it also means staying with the plan. Common sense tells you that you take an umbrella out into a rainstorm, but you leave the umbrella home when you hear a weather forecast for sunshine. Common sense does not seem to be common for large organizations, because there are so many things going on that one person cannot be in charge of everything. People say that in a large company, "the right hand does not know what the left hand is doing."

    And what is wrong with a society that thinks that making up a good excuse is like creating a work of art? One of the common problems with making excuses is that people, especially young people, get the idea that it's okay not to be totally honest all the time. There is a corollary(推论) to that: If a good excuse is "good" even if it isn't honest, then where is the place of the truth?

    Little Women is the story of four sisters growing up during the Civil War. Each March (马奇) sister has a different personality. Meg, the oldest, is dignified (端庄) and proper. Jo, next in age, is energetic and wants to be a writer. Beth is shy and quiet and loves music. Amy, the youngest, is spoiled (被宠坏的), a little conceited (自负), and enjoys art. In the following passage, an excerpt(节选)from Chapter 14 Secrets, Jo has a secret surprise to tell her sisters. Laurie is the boy who lives next door, and Hannah is the March's servant. The Spread Eagle is a newspaper in the town.

    In a few minutes Jo bounced (蹦跳) in, laid herself on the sofa, and pretended to read.

    "Have you anything interesting there?" asked Meg, with condescension (屈尊).

    "Nothing but a story, won't amount to much, I guess," returned Jo, carefully keeping the name of the paper out of sight.

    "You'd better read it aloud. That will amuse us and keep you out of mischief (恶作剧)," said Amy in her most grown-up tone.

    "What's the name?" asked Beth, wondering why Jo kept her face behind the sheet.

    "The Rival Painters."

    "That sounds well. Read it," said Meg.

    With a loud "Hem!" and a long breath, Jo began to read very fast.

    The girls listened with interest, for the tale was romantic, and somewhat pathetic (哀婉动人), as most of the characters died in the end. "I like that about the splendid picture," was Amy's approving remark, as Jo paused.

    "I prefer the lovering part. Viola and Angelo are two of our favorite names, isn't that strange?" said Meg, wiping her eyes, for the lovering part was tragical (凄婉).

    "Who wrote it?" asked Beth, who had caught a glimpse(瞥) of Jo's face.

    The reader suddenly sat up, threw away the paper, displaying a red face, and with a funny mixture of solemnity and excitement replied in a loud voice, "Your sister."

    "You?" cried Meg, dropping her work.

    "It's very good," said Amy.

    "I knew it! I knew it! Oh, my Jo, I am so proud!" and Beth ran to hug her sister, wild with joy over this splendid success.

    Dear me, how excited they all were, to be sure! How Meg wouldn't believe it till she saw the words. "Miss Josephine March," actually printed in the paper. How politely Amy criticized (批评) the artistic parts of the story, and offered advice for a sequel (续集), which unfortunately couldn't be carried out, as the hero and heroine were dead. How Beth got excited, and skipped and sang with joy. How Hannah came in to shout in great astonishment at 'that Jo's doin's'. How proud Mrs March was when she knew it. How Jo laughed, with tears in her eyes, as she declared she might as well be a peacock(孔雀) and done with it, and how the 'Spread Eagle' might be said to fly his wings proudly over the House of March, as the paper passed from hand to hand.

    "Tell us about it." "When did it come?" "How much did you get for it?" "What will Father say?" "Won't Laurie laugh?" cried the family, all in one breath as they gathered around Jo, for these foolish, affectionate (痴情的) people had a celebration of every little joy of family.

    The market for products designed specifically for older adults could reach $30 billion by next year, and startups (初创公司) want in on the action. What they sometimes lack is feedback from the people who they hope will use their products. So Brookdale, the country's largest owner of retirement communication, has been inviting a few select entrepreneurs just to move in for a few days, show off their products and hear what the residents have to say.

    That's what brought Dayle Rodriguez, 28, all the way from England to the dining room of Brookdale South Bay in Torrance, California. Rodriguez is the community and marketing manager for a company called Sentab. The startup's product, Sentab TV, enables older adults who may not be comfortable with computers to access email, video chat and social media using just their televisions and a remote control.

    "It's nothing new, it's nothing too complicated and it's natural because lots of people have TV remotes." says Rodriguez.

    But none of that is the topic of conversation in the Brookdale dining room. Instead, Rodriguez solicits residents' advice on what he should get on his cheeseburger and how he should spend the afternoon. Playing cards was on the agenda, as well as learning to play mahjong(麻将).

    Rodriguez says it's important that residents here don't feel like he's selling them something. "I've had more feedback in a passive approach." he says. "Playing pool, playing cards, having dinner, having lunch, all work better than going through a survey of questions. When they get to know me and to trust me, knowing for sure I'm not selling them something—there'll be more honest feedback from them."

    Rodriguez is just the seventh entrepreneur to move into one of Brookdale's 1,100 senior living communities. Other new products in the program have included a kind of full-body blow dryer and specially designed clothing that allows people with disabilities to dress and undress themselves.

    "First and foremost, the residents love it." says Smith. "It also provides Brookdale the opportunity to learn about and experience new technologies quickly and inexpensively and to make sure that we understand what residents want and need."

    Mary Lou Busch, 93, agreed to try the Sentab system. She tells Rodriguez that it might be good for someone, but not for her.

    "I have the computer and FaceTime, which I talk with my family on." she explains. She also has an iPad and a smart phone. "So I do pretty much everything I need to do."

    Rodriguez takes it pretty well.

    "I'm not going to lie to you, I would've liked a more positive response." he says. But "if people don't need it or want it, it's up to us to change, adapt it or make it more useful."

    To be fair, if Rodriguez had wanted feedback from some more technophobic (害怕技术的) seniors, he might have ended up in the wrong Brookdale community. This one is located in the heart of Southern California's aerospace corridor. Many residents have backgrounds in engineering, business and academic circles.

    But Rodriguez says he's still learning something important by moving into this Brookdale community: "People are more tech-skilled than we thought."

    And besides, where else would he learn to play mahjong?