On September 16th, 2022, some students are showing their car on a US tour to universities and companies from the East Coast to Silicon Valley.

It is a kind of sporty car but it is the special one. It is called ZEM, short for zero emission mobility, as the beginning letter of the name shows it gives out zero carbon. It has two-seater houses with battery box, and most of its parts are 3D-printed from second hand things.

“We are just to make a better and clearer future,” said Jens Lahaije, a manager of the Eindhoven University of Technology student team that made the car.

Compared with common cars, such battery electric cars give out no CO₂, but battery can also make our air around us dirty and dangerous. So, the cost of doing with it isn’t low.

Cleaning the air by getting CO₂ in is a pretty new way for a car. The students made it come true in this kind of car, ZEM. The idea is quite useful: while driving, the air will move through cars and the CO₂ will be got in.

The Eindhoven team thought ZEM uses two machines that get 2 kgs of CO₂ over 32,186 kms of driving, later these machines can be emptied at stations when they take in more electric to let the car work.

As for carbon emissions, the European Union made strict rules years ago, and most European car companies began to move to electric cars, but they didn’t make more wonderful cars than that one, ZEM.

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How much heat can dancers produce? Can the heat energy be stored or used? The SWG3 Arts Center in Glasgow, Scotland used a system called Bodyheat, which can use body heat of the dancers as a source of energy.

In the Arts center, there are some air collectors taking in the heat produced by dancers. The heat goes through pipes and travels into 12 holes which are 200 meters below the ground. These holes connect to a large underground rock that can store the heat energy like a thermal battery. When the heat energy is needed, the system then moves it to areas that need warming. The heat energy can be turned into usable electricity. People can use it to charge phones or heat water. Besides, some hot air cools in the underground and it then can be sent to cool down the people in the arts center through pipes.

When a person is just standing, he is producing about 100—150 watts of energy. When he starts dancing at a medium pace, he might be producing about 250 watts. So the harder people dance, the more heat energy they create. Data shows that the arts center has reduced the output of CO₂ by 70 metric tons each year since it used Bodyheat. It has also saved a lot of money on energy bills.

During COP26 conference in Glasgow in November, Bodyheat was shown. The system stored the heat from visitors and used it to power lights and heating. Bodyheat is thought to be a really good system. It may help solve the energy problem in the UK by producing more energy, so the UK will probably not depend on buying energy from other countries.

Now, SWG3 plans to turn off their gas boilers and use Bodyheat to provide energy for all their heating. The hope is that by 2025, SWG3 will not let CO₂ go into the air. The managing director of SWG3 said. “Bodyheat is a good way to deal with climate change. If we can make it work here, there’s no reason why we can’t take it to other places across Europe and other areas, not just here in Scotland and the UK.”

Kakadu is the largest national park in Australia, covering almost 20, 000 square kilometers. The large area includes amazing forests and endless wetlands, which make Kakadu a wonderland to wildlife. More importantly, Kakadu is an Aboriginal living cultural landscape.

Kakadu has been home to Aboriginal people for more than 65, 000 years. The Aborigines are believed to be the first humans in Australia. Before non-Aboriginal people arrived, about 2, 000 Aborigines had lived in the Kakadu area. Later, many indigenous people died of illness or moved off their land. Now there are only about 500 Aboriginal people living there. However, their ancestors recorded the long history through rock art in Kakadu.

Kakadu National Park has one of the world’s largest collections of Aboriginal rock art. Most paintings can be found in caves. They show objects the Aborigines used, animals they hunted and activities they did. The first rock art is thought to be the direct print of hands, and plants such as grass, onto the rock. Later, around 15, 000 years before present, humans were shown on the rock, telling the activities and stories of the Aborigines. The rock art is well-kept and has great cultural value, and that’s why Kakadu appeared on the World Heritage List in 1981.

In order to make sure the rock art is not damaged by natural processes or human activities, the Aborigines work together with Parks Australia to manage Kakadu. But cultural tours are offered in Kakaduand. Visitors are welcome there. Whether visitors choose to enjoy a boat cruise, or a guided walk through the park, they will step back in time and have an adventure tour that they will never forget.

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6 . It may sound strange, but many people play noise to help themselves sleep better. Actually, this kind of noise is called coloured noise, such as white noise, pink noise, and brown noise.

Coloured noise contains a wide range of frequencies. However, it shows stronger intensity at certain frequencies. For example, violet noise has stronger intensity at higher frequencies. Brown noise produces deeper sounds such as heavy rainfall, because it shows stronger intensity at lower frequencies. White noise has equal intensity across all frequencies. Typical examples of white noise are the noise made by fans, and natural sounds like gently running water. Pink noise is similar to white noise but has stronger intensity at lower frequencies.

There have been several experiments on the effect that noise has on people. In a 2021 study, 10 people in New York City affected by loud environmental noise showed improved sleep quality and sleep duration when white noise was played. Another sleep study showed that 16 adults actually improved their memory of vocabulary after listening to pink noise in their sleep, though the effect of pink noise on sleep quality wasn’t measured. Some people suggest that brown noise is the best noise for their sleep. However, no studies have proven it.

So why do some people claim to sleep better with certain coloured noise? There are some theories that can explain it. One is about sound masking, and it shows that white noise masks other sounds of noise, resulting in better sleep. Another theory is that this sleep-aid effect could be an example of classical conditioning. For example, people who sleep better with brown noise may have conditioned themselves over time to fall asleep when they hear it.

Every coloured noise has its benefits. It is your personal choice to decide which coloured noise is the best for you to get a good sleep!

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A Guide to Have More Fun

When is the last time you had fun? Felt truly happy? If you’re making efforts not to be bored in your life, we’ll offer you expert advice on how to have more fun.

◎Find a new hobby. You may not be having as much as you want because you feel like you’re doing the same old thing day after day. 1 It will not only provide something to look forward to in your daily life, but it will also make you more open to new ideas.

◎ 2 Experts suggest that music helps reduce (减少) stress and improves your feelings. Every time you feel stressed, turn on a song you like to reduce your stress. By doing so, you’ll make it a part of your daily activities which will improve your feelings.

◎Take a trip together. Travel is great for your mental health. 3 And try to improve your relationships with the people you travel with. Travel doesn’t have to be big or expensive either. It can be as simple as taking a road trip just a few hours away.

◎ 4 You won’t seriously influence your productivity if you take the time to enjoy a little game once in a while. Even just playing with silly putty while you’re at your desk will make your study day a little more enjoyable.

Even busy with your study, it’s still important to find time for fun. It makes your life not so boring and offers lots of health benefits like less stress, better memory and more energy.