YOUR KIDS ARE AMAZING —especially compared with everybody else's (who seem to cry all the time). How do you show your love for your kids this holiday season? With toys that are smooth and colorful, interactive and exciting. And with ones that have educational value — because you are the boss.

FLAX ART HOSPITAL PUZZLE AND PLAY SET

    Here is a toy that doesn't need power, and the kids have to put it together themselves. This 50-piece-puzzle set is made of soft-edged hardwood and makes a complete hospital, with an X-ray room. It also includes eight patients, a car and a driver. $135.

TINY LOVE ACTIVITY BALL

    Sure, it's cool, but this colorful baby toy also develops problem solving and motor skills. It has a head and legs, a magnetic(磁铁) hand and a tail. Suitable for little ones from 6-36 months. $19.95; tiny-love.com.

ROBOSAPIEN

    This small, remote-control robot is really powerful. It performs 67 preprogrammed functions, including throwing, kicking, picking up and dancing. You can even program your own function — which, sadly, does not include doing windows. $99 robosapienonline.com.

MINI PEDAL CAR

    Want a mini Cooper but can't fit the family inside? Get one for the kids. They can jump into this mini car, which comes in hot orange with a single adjustable seat, and ride away. But it could spoil them for that used car they'll be driving when they turn 16. For ages 3 to 5. $189; minicar.com (click on “gear up” then “mini motoring gear”)

    How Did the Ancient Chinese Keep Food Warm in Winter?

    Facilities like electric rice cookers, microwaves, and electric kettles, make it easy for people to keep food warm and enjoy a comfortable winter. So how did Chinese people in ancient times keep food warm in winter without these? In fact, ancient Chinese people used their own methods of heat preservation as early as the Shang and Zhou Dynasties.

    ☆ “Wen Ding”, ancient rice cooker

    One of the major functions of an electric rice cooker is to keep food warm. The “Wen Ding”, an ancient cooking container, served the same purpose, but instead of using electric energy, the ancient cooking container preserved heat by burning fuels like charcoal.

    The “Wen Ding” unearthed in Nanjing in 1989 is thought to be the oldest of its kind discovered in China, dating back to the Stone Age. The craftsmanship of making the “Wen Ding” was developed in the Bronze Age. The bronze Ding from the Shang and Zhou Dynasties took on different shapes and structures.

    ☆ “Ran Lu”, ancient small hot pot

    The “Ran Lu” is a small size cooking vessel (器皿) made of bronze, which can be divided into three parts. A charcoal stove forms the main structure, with a bottom tray to hold charcoal ashes, and a movable cup at the top. Some experts have concluded that the vessel's structure suggests it may have been used as a small hot pot and that these vessels became popular in the Warring States Period (475—221 B.C.).

    ☆ Bronze You, ancient kettle

    The Bronze You was one of the most common wine containers during the Shang and Zhou Dynasties. The Bronze You can also be used to warm wine. For example, the Bronze You with beast mask design, unearthed in Jiangxi Province, has an opening where charcoal could be placed. Just as people today can't do without an electric kettle, the Bronze You allowed people to enjoy a hot drink.

    ☆ Bronze Yan, ancient steamer

    Although the “Wen Ding” was effective at keeping food warm, the ancient Chinese people later found that its burning process produced pollution. As a result, the Bronze Yan made with a two-tier structure and used to steam rice and other grains. After the Eastern Han Dynasty (25A.D.-220A.D.), further improvements to the Bronze Yan led to the modern-day steamer.

    One of the simplest and the most effective forms of communication involves nothing more than the movement of facial muscles. What am I talking about? Smiling! Everyone understands what a smile means, and everyone also understands what a frown means. In fact, these two basic facial expressions can be recognized across countries, across the world and across the globe, regardless of the language spoken or the culture lived in.

    Moreover, hugs are so beautiful! When you give someone a hug or someone comes up and gives you a hug, this simple act of a hug can “speak” volumes about how much you care for the other person, how much love you want to share with the other person, how much you have missed the other person. This hug has so much to say, and yet there never has to be any words spoken.

    And, who needs to say the words “yes” or “no” when a movement of the head says the same thing. These basic examples show just how powerful body language can be. Just knowing how to read and use body language effectively, makes it really easy to see why it is not always a bad thing to be lost for words.

    Body language in the world of love is a very common thing and sometimes the only thing. And, most of the time, body language is the very first words “spoken” before any words are. The old saying is “love at first sight”, not “love at first word”. Across a crowded room, their eyes meet and linger, he winks at her, and she raises an eyebrow. The connection is made without any words needed. These displays of body language say it all. In fact, sometimes they can say more than words can.

    An earthquake is one of the most common natural disasters. It may cause great damage.  So it is wise to learn some simple safety tips to protect yourself or your family members.

    Fragile items, like those made of glass should usually be placed on a lower surface, near the ground instead of placing them on cupboards higher up. Never place them near your bed, sofas and other furniture where you would be sitting or lying down. When there is a strong movement, these pieces will fall on the floor directly and not on you.

    There is a strong chance of short circuits（短路）and fire breakouts during an earthquake. Make sure you turn off electrical connections and gas immediately when an earthquake happens.

    During an earthquake, lie beneath an object that is not easily damaged. Do not go near objects that could directly fall on you. Never use the elevator to go down. Stay inside until the shaking stops and it is safe to go outside. Research has shown that most injuries happen when people inside buildings try to go out. Use the staircases at all times.

    If you are outdoors, do not take shelter under a tree, streetlights, electric poles or tall buildings. If you are driving, stop your car and stay in a safe place. Do not park your car under a tree or any tall object.

    If trapped in debris (瓦砾堆), cover your mouth with a handkerchief or clothing. Tap on a pipe or wall so rescuers can find you. Use a whistle (哨子) if one is available. Never shout for help. Shouting can cause you to breathe in dangerous amounts of dust. Do not light a match because you may burn yourself. Do not move about or kick up dust.

A huge lake of salty water appears to be buried deep in Mars, scientists reported this week. The presence of water raises the chances of finding life on the red planet. The discovery is based on observations by a European spacecraft. It has excited experts. Water is necessary for life, and scientists have long hoped to prove that it is present on Mars.

Cassie Stuurman is a geophysicist at the University of Texas. In 2016, she found evidence of a huge ice deposit(沉积)on Mars. “If these researchers are right, this is the first time we've found evidence of a large water body on Mars. ”Stuurman said. Researchers are not yet sure how deep the area of water is. So, they cannot say whether it is an underground pool, or just an area of soft and wet soil.

In order to find the water, Italian researchers examined radar signals. The signals were collected over three years by the European Space Agency's Mars Express spacecraft. The results suggest that a 20-kilometer-wide water body lies below ice that is 1.5 kilometers thick. They believe the area is close to the planet's southern pole.

    Mars is very cold, but salt in the water may have kept it from freezing. It is the same as when you put salt on a road to prevent ice from forming. The water would be extremely cold, right at the point where it's about to freeze. And it would be salty. Such conditions are not ideal for life to form. But, she said there are bacteria on the earth that have been able to survive in similar conditions.

Mars has been a popular planet for exploration, with some groups placing instruments on its surface and others examining it from space. In May, NASA launched another spacecraft, the InSight Mars lander which will dig deep into the data under the surface after it reaches a flat area of the planet in November.

    Metal-organic frameworks(MOFs) are compounds that are set to solve some tough challenges: producing water in the desert, removing greenhouse gases from the air and storing dangerous gases more safely.

    The Arizona desert is really dry. Anyone stuck in it without water would die from dehydration (脱水) within three days. Unless, that is, they had one of Omar Yaghi's next-generation water harvesters. Although daytime humidity(湿度)is only about 10 per cent, this rises to 40 per cent at night, which means there's enough water in the atmosphere to support life — if it can be transformed into liquid form.

    That's exactly what Yaghi's device does. It's a box about the size of a small microwave oven designed to suck the humidity from the air at night and turn it into drinking water the next day using only the heat of the sun as its power source. What makes it work is a special material called a metal-organic framework (MOF), which at normal temperatures attracts water molecules (分子) onto its surface of its internal pores(细孔). Warm it up and the water is released, each harvest producing one-third of a cup of pure drinking water.

    "With further improvements, a device, the size of a washing machine, could produce enough water for the basic needs of a household," says Yaghi, a chemist at the University of California. One-third of the world's population lacks safe drinking water; for them such a device could be a lifesaver.

    These crystalline cluster(结晶群)of metals, such as aluminum or magnesium, linked by organic molecules can be made into materials with an extremely high absorption ability, attracting specific molecules to their surface. In this way, MOFs cling to a variety of liquids and gases.

MOFs work thanks to their unique structure—large quantities of nanometer-sized internal spaces. In fact one MOF has so many pores that they would cover an area as large as six football fields. MOFs are also extremely stable light and have many different uses: their molecular structure can be varied to attract specific molecules, such as water, and their pores can be designed to best store them. Adding a small amount of heat or pressure causes the MOF to release what it is holding. More than 70,000 different MOFs have been produced to date for various applications.