1 . The use of AI (artificial intelligence) is becoming more common in many branches of industry and online shopping. Traditional lines of work, such as goods transport and driving, are developing in a similar direction although mainly out of public view. Scientists at the University of Göttingen have now investigated how efficient (高效的) the use of AI can be in the commercial management of trucks.

“Digital applications—as well as machine leaning, a kind of AI—are increasingly applied to operations and courses in the transport area,” explains Professor Matthias Klumpp from the Faculty of Economics. “The question in the commercial area, however, is whether or not this contributes to achieving goals.”

To answer this question, the researchers compared the work efficiency of truck drivers with their main use of AI applications. Looking at trade delivery by truck, they studied three groups: the first drove completely following human decision-making models; the second used a combination of human and machine; and the third depended completely on fully automated decisions.

The researchers found that an intelligent combination of human work and decision-making abilities with AI applications promises the highest transport and driving efficiency. “On average, the second group achieved the most efficient transport trips, with the fewest interventions (干预) and off-course from the best path.” one researcher said, “Clearly, neither a completely human decision-making structure nor a fully automated driving system can promise to meet current goods transport requirements.” The scientists therefore summarized that despite the progress of AI in the field of transportation by truck, human experience and decision-making abilities will still be necessary in the longer term. However, the challenge is that a wide range of training and qualification (资格) needs will come along by working with Al applications, especially for simple goods transport activities.

3 . Light pollution is a significant but overlooked driver of the rapid decline of insect populations, according to the most comprehensive review of the scientific evidence to date.

Artificial light at night can affect every aspect of insects' lives, the researchers said. "We strongly believe artificial light at night — in combination with habitat loss, chemical pollution.invasive (入侵的) species, and climate change — is driving insect declines, " the scientists concluded after assessing more than 150 studies.

Insect population collapses have been reported around the world, and the first global scientific review published in February, said widespread declines threatened to cause a "catastrophic collapse of nature's ecosystems".

There are thought to be millions of insect species, most still unknown to science, and about half are active at night. Those active in the day may also be disturbed by light at night when they are at rest.

The most familiar impact of light pollution is moths (飞蛾) flapping around a bulb, mistaking it for the moon. Some insects use the polarisation of light to find the water they need to breed, as light waves line up after reflecting from a smooth surface. But artificial light can scupper (使泡汤) this. Insects are important prey (猎物) for many species, but light pollution can tip the balance in favour of the predator if it traps insects around lights. Such increases in predation risk were likely to cause the rapid extinction of affected species, the researchers said.

The researchers said most human-caused threats to insects have analogues in nature, such as climate change and invasive species. But light pollution is particularly hard for insects to deal with.

However, unlike other drivers of decline, light pollution is relatively easy to prevent. Simply turning off lights that are not needed is the most obvious action, he said, while making lights motion-activated also cuts light pollution. Shading lights so only the area needed is lit up is important. It is the same with avoiding blue-white lights, which interfere with daily rhythms. LED lights also offer hope as they can be easily tuned to avoid harmful colours and flicker rates.

4 . When you hear the beginning of your favorite song from the radio, suddenly your neck is covered in goose bumps.

It's such a thing that a group of scientists call “skin excitement”—a feeling of cold caused not by a drop in temperature or sudden scare, but by the sense of beauty. “Skin excitement” can come from a song, a painting, a moving movie scene, or even a beloved memory-pretty much anything that causes the giving out of pleasure-soaked dopamine in your brain. But it does not come for all of us.

Your favorite music uncovers a lot about your personality，and so does how you respond to that music. Studies suppose that as few as 55 percent of people experience “skin excitement” when listening to music. And if you count yourself among this group, the goose bumps on your skin aren't the only giveaway—scientists can read it in your brain, too. In a new study published in the journal Social Cognitive and Affective Neuroscience, Harvard researchers performed brain scans on 10 students who said they reliably got cold when listening to music, and 10 students who didn't. They found that the cold-prone brains may really be excited by stronger emotions.

Cold-prone brains are generally more likely to show stronger emotional intelligence than no-cold brains. Cold-prone minds tend to have unusual active imagination, reflect more deeply on their emotions, and appreciate nature and the beauty of music and art to a stronger degree than no-cold brains.

So, what type of music causes the chills? It seems that the type is not so important; participants in the new study reported getting cold from songs of every kind. And any song connected with a strong emotional memory of the listener can produce the most reliable results. For me, that's the song Sailing to Philadelphia by Mark Knopfler, which I listened to as a kid in the car with my dad, on the way to the summer camp.

6 . The public nowadays has a misunderstanding of forest fires, believing that fires should be kept out of every type of forest. Many of us can recall Smoky the Bear's famous warning: “Remember, only YOU can prevent forest fires”. However, that's not always the case. Under the right conditions, and when conducted safely, fire can create many environmental benefits as well as help prevent larger, uncontrollable wildfires.

After a forest fire, many wildlife species will move into recently burned areas to feed on these newly available foods. Some reptiles and amphibians such as the pine (松树） snake prefer forests frequently burned by fire. As Herbert Stoddard put it, “One of the most harmful things modern man has done to birds has been his attempt to exclude fire from fire-type pine forests. Within a few years most forests choke up with bushes, lose their prairie-like vegetation (草原般植被） and can no longer support birds dependent on periodic burning for their food supply and proper cover.”

If you are asked to picture the forest floor, what do you see? Pine needles, cones, leaves, branches might come to mind-all sources of fuel. If these fuel sources build up without any type of removal, the 'fuel load' can lead to fires catastrophic to forests and people alike. In contrast, prescribed fire can be used by forest professionals every couple of years to keep forest fuels at an appropriate and manageable level. They can also minimize the spread of pest insects and disease and remove unwanted tree and plant species. Plus, they can create and maintain important wildlife habitats rich in grasses and promote the growth of trees, wildflowers and other various plants.

Many organizations and agencies work to promote fire on the landscape when and where appropriate. Smokey Bear even has an updated warning: “Only You can Prevent Wildfires,” as the Forest Service has over the last few decades developed policies and procedures to include prescribed fire as a management tool, as well as continuing their work to prevent and fight wildfires.

7 . When it comes to sitting properly, we all know the correct way even if we don' t do it to the letter. No crossed legs, bottoms touching the back of the chair and feet on the ground. But even if you' re doing it right, sitting for long periods is shockingly bad for you. It has been described as the new smoking, linked to heart disease and even cancer. There is no doubt we should all try to do less of it. But perhaps we could also do it better.

A classic survey, published in 1953, described 100 different sitting postures adopted by 480 cultures around the world. Among the most common were sitting cross-legged, kneeling and the deep squat (深蹲), with feet flat on the ground and bottoms resting on or just above it. Even in Western cultures, these are preferred sitting positions among young children. But Westerners tend to prefer chair use from an early age, insisting children sit on seats in school.

One big problem with this desire for chairs is that they make sitting so, well, sedentary (久坐不动的). Consider the Hadza, a group of hunter-gatherer people in Tanzania. They spend around 9 hours a day sitting. However, they squat and sit on the ground in various positions, and this involves high levels of muscle activity. The supportive nature of chairs, with their high backs and armrests, removes this effort perhaps the reason that people love them.

So what' s the best way to sit? Josette Bettany-SaItikov at Teesside University, UK has found that kneeling can help keep the spine in a better position as does squatting. We might also take inspiration from traditional cultures like the Hadza. "Use a variety of postures and preferably not just still postures but some which allow movement," says Bettany-Saltikov.

Bettany-Saltikov believes that we should be rethinking what it means to do a desk job. "We still need to design workplaces that enable people to be productive while being lightly active, like with under-table cycling or walking desks," she says. For now, if your job is sedentary, don' t forget to stand up regularly and move around.

9 . Iceland has long been identified as having unique environments. Here you can walk and swim between tectonic (地壳构造的) plates, bath in geothermal waters, and experience the wild landscapes. Furthermore, these unique environments have attracted the space-science community to use Iceland as one of its test sites for missions travelling to Mars (火星).

DAY 1

Arrive in Reykjavik.

After check-in, you will visit the geothermal pools of the Blue Lagoon to relax after your flight, before returning to your hotel to freshen up. You will then head to the Aurora Basecamp Observatory, where you will be able to see the northern lights recreated indoors. In the evening, space expert Niamh Shaw will give the first of two talks on our attempt to establish bases on other planets.

DAY 2

After breakfast, you will set out on special vehicles towards Þingvellir National Park, a registered UNESCO world heritage (遗产) site accompanied by Niamh. Here, you will have the opportunity to do something that you can’t do anywhere else, the opportunity to swim between the tectonic plates. In the evening, you will enjoy a second talk from Niamh.

DAY 3

Today you begin your journey towards the 2020 NASA test site, where the NASA SAND_E Mars Rover is being tested. NASA scientists will be on hand to explain the project, along with updates of the current Mars missions and the most recent findings.

DAY 4

In 2019, Iceland Space Agency hosted the ISAGEVR1 Expedition to Grimsvötn Volcano on top of the Vatnajökull Glacier (冰川) to field test the MS1 Mars Analog Spacesuit designed by the NASA/Johnson space centre. We will be working together with the agency to create a unique experience for you today on the glacier.

DAY 5

In the afternoon, you will reach the bridge between the continents, spanning a gap in between the two tectonic plates, on your way to Keflavik Airport and your evening flight home.

10 . The beauty of the outdoors naturally encourages people to go outside. The drive toward the natural world is present in normal times. Now, as many people are locked indoors, spending hours in front of screens, the pull of watching wind blow branches of neighboring trees is hardly matched. Forest therapy is one way to satisfy the demand while improving personal health and well-being.

Inspired by the Japanese practice of shinrin-yoku, or "forest bathing", forest therapy is a guided outdoor practice, which encourages people to experience the pleasures of nature through all of their senses and be present in the body.

Research on shinrin-yoku began in Japan in the 1980s when leaders there noticed a sharp rise in stress-related illnesses in the country, resulting from people spending more time working in technology and other industrial work. Specific settings were created to guide people in outdoor experiences. Research showed forest bathing may help reduce stress, improve attention, and lift moods.

Stress raises levels of cortisol, which plays a role in high blood pressure, heart disease and headaches. In test subjects, levels of cortisol decreased after a walk in the forest. Trees give off oils called phytoncides that have special properties and may influence immunity(免疫力). Exposure to natural tree oils helps lift depression, lower blood pressure. One study showed a rise in the number and activity of immune cells, which fight viruses and cancer, among people who spent three days and two nights in a forest compared with people taking an urban trip. This benefit lasted for more than a month after the forest trip!

Don't worry if you don't have three days to spend in the forest. A recent study showed spending at least 120 minutes a week in nature improved self-reported health and well-being. It doesn't matter whether the 120 minutes represents one long trip, or several shorter visits to nature. So, even as we are honoring physical distancing, it's possible and essential to get outside for 20 minutes every day and enhance our well-being.