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    Sleep, as we know, is important to us because it helps restore tired organs and tissues in our body. But how much sleep do we actually need?

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    For most of us, eight hours seems to be about the right amount. Yet we know that there are a great many people who get along perfectly with less sleep and some who may even need more. A great deal depends on the way we live. But a good general rule to follow is to sleep as long as we have to in order to feel happy and be able to work at our best when we are awake.

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    There are actually different levels of sleep. There is a deep sleep and a shallow sleep. In a shallow sleep our body does not get the same kind of rest as it gets in a deep sleep, so that after eight hours of a shallow sleep we may still feel tired. But a short deep sleep can be very restful.

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    Alexander the Great was able to get a deep sleep whenever he needed it. Once, during the night before an important battle, he remained awake longer than anyone else. Then he wrapped himself in a cloak and lay down on the earth. He slept so deeply that his generals had to wake him three times to give command to attack!

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    Normally when we go to sleep, our “ sleep center” blocks off nerves so that both our brain and our body go to sleep. One prevents us form wanting to do anything and the other makes our internal organs and limbs go to sleep. But someone will fall asleep (brain sleep) and keep on marching, because his body is not asleep!

Chopsticks

    Right now, millions of people are digging into their food with two sticks that have school the test of time as a utensil(烹调用具)for humans. But what's so special about them? {#blank#}1{#/blank#} Personally, I think they teach us the importance of:

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    If you're ever tried using them, you know that you can't get what you want by just randomly stabbing at the plate. To be able to get what you want, you have to aim for it. There's no way you can pick up everything in one go. Know what you want, and just do it. {#blank#}3{#/blank#} 

    Practice

    Using chopsticks doesn't come naturally. You can't learn to use them by just reading about them. {#blank#}4{#/blank#} It is the same with the real life. You can read as much as you like about all the things you want to do, but it will just amount to dreams and theory if you don't try actually doing it.

    Slowing Down

    {#blank#}5{#/blank#} Why? Because it allows your stomach to tell your brain you're full before you overeat. Eating with chopsticks is a slower process, but that is not necessarily a bad thing. Sometimes we need to slow down and take things one step at a time, so that we have time to think and realize that we don't have to keep charging full speed through life.

A. Aim

B. Motivation

C. What can we learn from them?

D. You have to practice using them

E. Those who eat too fast were less successful at losing weight

F. Sometimes, a little bit of focus makes the difference between failure and success

G. A common health tip is to try to eat with chopsticks when you can

    Humans have launched themselves into the outer space. They've landed on the moon. They've built habitable space stations that orbit the Earth. The next giant leap for mankind is to reach another planet – specifically, Mars.

    The problem is that it's no easy task. The planet is 586 times further away from the Earth than the moon, and it'll take around 180 to 220 days to reach Mars, depending on where each planet is in its orbit. Such long periods in space have suggested many potential health problems, including hormonal changes, skin conditions, and muscle and bone deterioration (损耗).

    Here's where some furry friends come in. A wide range of animals have been in space, from fruit flies and spiders to cats, and dogs. Such experiments began as far back as the late 1940s in first tests to see if living things could withstand the extreme g-force (重力) of a rocket launch.

    Mice continue to play a very important part in space experiments, mainly because the animals make excellent test subjects. They're small, which makes them inexpensive and easy to care for. In addition, their size and short life span make it possible to do the equivalent of several human years of tests in a much shorter time. Finally, because mice are mammals, they share many common characteristics with humans in terms of genetics, biology and behavior.

    Astromice have hit the headlines recently, as a team of scientists led by Betty Nusgens, professor of biology at the University of Liege in Belgium, found that the mice suffered a 15 percent thinning of their skin after 91 days aboard the International Space Station (ISS).

    This experiment was part of a wider NASA mission (任务) called the Mice Drawer System (MDS). The Italian Space Agency developed the facility, which allows six mice to be housed, monitored, and automatically fed and watered aboard the ISS, among which three survived during the mission.

    The mice have participated in 20 separate experiments, to study such effects as osteoporosis (骨质疏松症), anemia (贫血) and heart health.

    Results for the 20 experiments are coming in gradually. But it's clear that mice continue to play an important role in the ongoing quest to conquer the final frontier.

    We're Hiring Shift Workers For Our Production Plant Looking for a career with a company that values its employees, and promotes from within? Then Black Cat Blades is the company for you!

Cutting Operators

CNC Operators

Heat Treat Operators

    Full training provided, starting at $14.50 per hour, with the potential to move to $18.16 in one year.

    We also require a Skilled Welder (焊接工),to work 12-hour rotating shifts (轮班) in our cutting Department. The successful candidate must be a registered journeyman（熟练工人) within the Province of Alberta or a Red Seal.

    We offer a great benefit package, including health, dental and RRSP's. Numerous motivations: Profit Sharing, Pay for Years of Service, Fitness Program Allowance, and fun social events for you and your family.

    Apply in person, and we'll take you on a tour of our Production equipment or forward your personal information by fax or e-mail.

    Black Cat Blades Ltd.

    HR@ blackcatblades.com

5604-59 St., Edmonton, AB T6B 3C3

Fax: (780) 465-9595

    Would it surprise you to learn that, like animals, trees communicate with each other and pass on their wealth to the next generation?

    UBC Professor Simard explains how trees are much more complex than most of us ever imagined. Although Charles Darwin thought that trees are competing for survival of the fittest, Simard shows just how wrong he was. In fact, the opposite is true: trees survive through their co-operation and support, passing around necessary nutrition（营养）“depending on who needs it”.

    Nitrogen（氮）and carbon are shared through miles of underground fungi（真菌）networks, making sure that all trees in the forest ecological system give and receive just the right amount to keep them all healthy. This hidden system works in a very similar way to the networks of neurons（神经元）in our brains, and when one tree is destroyed, it affects all.

    Simard talks about “mother trees”, usually the largest and oldest plants on which all other trees depend. She explains how dying trees pass on the wealth to the next generation, transporting important minerals to young trees so they may continue to grow. When humans cut down “mother trees” with no awareness of these highly complex “tree societies” or the networks on which they feed, we are reducing the chances of survival for the entire forest.

    “We didn't take any notice of it” Simard says sadly. “Dying trees move nutrition into the young trees before dying, but we never give them chance.” If we could put across the message to the forestry industry, we could make a huge difference towards our environmental protection efforts for the future.

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