A Lifesaving At-Home Checkup

    More importance is attached to physical fitness nowadays. However, staying fit can be expensive when going to professional agencies for medical checkups. Here we show you three ways to do medical checkup at home, try them for a rough idea about your health condition.

    1 Balance On One Leg

    Hold for up to 60 seconds. If you fall down early, you may be at higher risk for brain decline. In a Japanese study, 30 percent of older adults who could balance for only 20 seconds or fewer had microbleeds in the brain, an early sign of risk for stroke or dementia(痴呆). These microbleeds can affect balance, memory, and decision making.

    2 Touch Your Toes

    Sit with your back straight, then lean forward and try to touch your toes. Not even close? You might be at risk for heart problems. By using this test, University of North Texas researchers found that some old inflexible folks have to have the heart work harder to provide enough blood, raising the risk of heart attack or stroke.

    3 Sitting To Standing

    Time how long it takes to lift and lower yourself from a chair ten times as fast as you can. Senior adults who did ten repetitions in 21 seconds or fewer were less likely to die over the next 13 years than those who took longer. The test requires muscle strength, balance, and heart fitness; being slow could mean underlying disease before symptoms arise.

    The above are home tests everyone could do to keep you fit and they don't require much time or money. Learn what possible dangers are hiding inside you and how to deal with them.

    For centuries, people wondered how big the Earth was. Unfortunately, although the Earth was flat, no one was able to figure out its size. Gradually, however, people began to realize that the Earth was really round.

    Then, in the third century BC(2,300 years ago), a Greek man named Eratosthenes had an idea. Eratosthenes was sure that the Earth was a sphere. He used the sun and geometry(几何学) to figure out the size of the Earth. He calculated that the circumference(圆周) of the Earth was 28,600 miles(46,000 kilometers). The true size of the Earth is 25,000 miles(40,000 kilometers).

    Eratosthenes' measurement was wrong, but it was very close to the truth.

    For many centuries after Eratoshenes lived, people made maps of the Earth. However, they did not know very much about the world outside of Europe, Asia, and North Africa. Mapmakers could not draw accurate maps of the Earth until people began traveling around the world in the fifteenth century, mapping small areas each time. In the eighteenth and nineteenth centuries, people began making correct maps of countries, but the first accurate maps of the world were not made until the 1890s.

    Maps today are reliable(可依靠的), inexpensive, and easy to understand. People depend on maps every day. What would our lives be like without them?

    Most people who own iPhones use them as their alarm clocks―making it very easy to check emails one last time before falling asleep and hard to ever feel away from work and social networks.

    Several years ago, my boss fainted due to exhaustion after staying up late to catch up on work. She banged her head and ended up with five stitches (缝针) and became what she calls a "sleep evangelist (传教士)." Now she leaves her phone charging in another room when she goes to bed and encourages her friends to do the same.

    "I sent all my friends the same Christmas gift―a lovely alarm clock―so they could stop using the excuse that they needed their very attractive iPhones by their beds to wake them up in the morning." she said.

    If your phone wakes you up in the morning, it may also be keeping you up at night. A 2008 study showed that people exposed to mobile radiation took longer to fall asleep and spent less time in deep sleep. "The study indicates that during laboratory exposure to 884 MHz wireless signals, components of sleep believed to be important for recovery from daily wear and tear are severely affected," the study concluded.

    A quarter of young people feel like they must be available by phone around the clock, according to a Swedish study that linked heavy cellphone use to sleeping problems, stress and depression. Unreturned messages carry more guilt when the technology to deal with them lies at our fingertips. Some teens even return text messages at midnight.

    Most of us choose not to set limits on our nighttime availability. Nearly three quarters of people from the age of 18 to 44 sleep with their phones within reach, according to a 2012 Time poll. That number falls off slightly in middle age, but only people aged 65 and older are leaving the phone in another room as common as sleeping right next to it.

    While every dog owner knows their dogs can read their moods perfectly, scientists have always been a little doubtful. Now thanks to some researchers at the University of Veterinary Medicine in Vienna, Austria, we finally have some convincing evidence.

    For this study, biologist Corson Miller and his team exposed eleven selected dogs to digital images of women that were either angry or happy. Half the dogs were rewarded for touching the screen when shown a happy face, while the other half given their treat for selecting those that appeared angry.

    Interestingly, the dogs were not provided with the entire face. Some dogs were shown only upper halves while the others observed lower halves. That's because the scientists believe humans show their eruptions on their entire face.

    After some training on how to recognize small differences like the wrinkles between the eyes or the changes in their shape that accompany the happy or angry expressions, the dogs were mostly able to identify the correct expression not only on a familiar face but on a strange face, the researchers concluded the dogs were smart enough to read human emotions.

    They also found those being trained to read angry expressions took a longer time to learn. They guess it may be because dogs find angry faces disgusting, causing them to back away quickly. However, once the smart dogs realized they were getting rewarded, the trepidation seemed to disappear. In fact, the dogs had such a good time playing the computer "game" that scientists had a hard time keeping them away from the touch screens after the study was completed.

    The researchers also noticed only dogs with a male owner had a harder time understanding the expressions correctly. Since the touched screen models were all females, this confirmed what has been observed in previous studies-dogs are more efficient at reading facial expressions of people that are the same gender as their owner.

    A young woman carrying a three-year-old child got on a bus. The conductor hurried to give her a warm welcome and then kindly asked the other passengers to make more room for the woman and her kid. On seeing this, people were surprised and began to talk." You know this conductor used to be very rude. Now suddenly he has changed his bad behavior, "said a middle-aged man.

    "Yes, he should be praised and we must write a letter to the company," said a second passenger." That's right," another lady said, "I wish a newspaper reporter were here so that more people could learn from this conductor."

    Just then a gentleman who looked like a teacher turned to the conductor and said, "Excuse me, but can I know your name, please? Your excellent service must be praised…"

    Before he could open his mouth, the three-year-old kid sitting on the young woman's lap interrupted, "I know his name; I call him Dad."

    On the very first day, God created the cow and said to him, "As a cow, you must go to the field, working under the sun all day long! And I will give you 40 years to live." The cow objected, "What? You want me to live such a tough life for 40 years? Let me have 20 years, and I'll give the rest back to you." So God agreed.

    On the second day, God created the dog and said, "You'll be man's best friend, guarding his house and eating his leftovers. I'll give you a life span of 30 years." The dog shook his head. "Eating leftovers for 30 years? No way! I'll give half back to you!" So God agreed.

    Then, God created the monkey, saying, "Your job is to entertain people. You've got to do monkey tricks and make them laugh. And you'll live 20 years."" Do monkey tricks to make them laugh? 10 years will do." the monkey said. So God agreed.

    Finally, God created the man. "You will be the man. All you need to do is to sleep, eat, and play, simply enjoying your life. And I'll give you 20 years to live." Thinking for a while, the man replied, "I can be the man, but I want to take all the years that the cow, the dog and the monkey didn't want." So God agreed.

    Since then, man eats, sleeps and plays in the first 2 decades, marries and spends the next 2 decades like a cow, working very hard to support his family. Then when he has children, he lives 15 years like a dog, taking care of the house and eating whatever is given to him. And when he is old, he retires and lives 10 years like a monkey, doing tricks to amuse his grandchildren.