【推荐1】What Would It Feel Like to Touch a Cloud?

When characters fly or fall through the sky, they often do all sorts of crazy things to touch clouds as if the sky were made of cotton balls.     1     But we probably didn’t realize it at the time. “Technically, clouds are really tiny, little droplets (滴) of water that happens to be floating in the air,” said Pistone, a research scientist working at NASA to study clouds.

    2     Let’s take examples. Have you ever walked outside on a really foggy day? The type of day that you can’t see very far. Fog is the exact same thing as a cloud.     3     If you don’t remember ever walking through fog, or perhaps live in a dry area where fog is not common, Pistone said it feels like walking through a very light fine rain. But not quite, because the cloud droplets are a lot smaller than the rain droplets.

Clouds do more than make rain and snow.     4     Black or dark clouds usually mean a storm is coming because they’re packed so full of water that light can’t pass through them. On the other hand, many clouds appear bright white because when light from the sun tries to shine through, it gets bounced around by the many suspended (悬着的) water droplets. All of this is important for scientists to study because a lot of big, white clouds help reflect heat back into space.     5    

So the next time you see a sky full of pillow-white clouds, think about all the ways those tiny water droplets might be affecting the world around us.

【推荐3】Do you know that one of the main causes of some aches and pains is lack of sleep? Sleeping well is essential for a healthy life.

    1     Sleeping is an activity that no healthy person can do without. Eight hours a day of our entire lives are focused on being able to sleep. It’s an activity that’s responsible for relaxing us after a long day of work and study. Meanwhile it can recharge our energies to perform to the maximum the next day.

Getting quality sleep has many benefits. It can help you to:

    2    

Minimize illness.

Reduce heart disease.

Have greater concentration on your activities.

People need different amounts of sleep. It’s generally suggested that the proper amount should be 8 hours.     3     But this would not be possible at all if there were no quality elements that provide us with a good rest, the pillow, for example.

By getting a good pillow you can enjoy great hours of sleep and deep rest.     4     That’s because they are the pillows preferred by the general public since they can avoid dust.

Another type of pillow highly recommended to those who want a good rest is the knee pillow for side sleepers. This type of pillow is placed between the legs at bedtime. They are designed specially for those who prefer to sleep in the fetal (胎儿) position.     5    

Also recommended, for example, are body pillows that focus on keeping the spine (脊柱) level. Some are made for you to sleep on your back or stomach all night long.