With the arrival of winter, the world is covered in a sheet of shining snow, and it brings an invitation to take part in exciting snow sports. Beyond the great wonderland and the great joy of sliding down hills, attending winter sports offers many physical, mental, and social benefits.

Taking part in winter snow sports is an excellent way to stay physically active during the colder months. Whether you’re skiing down a mountainside, or skiing along peaceful paths, these activities provide a full-body workout. Downhill skiing, for example, is known as a way to burn a lot of calories, making it an effective cardiovascular (心血管的) exercise. The combination of cardiovascular fitness and strength training can help keep a healthy weight, improve cardiovascular health, and keep overall physical health.

The connection between outdoor activities and mental health is well-established, and winter sports are no exception. The fresh mountain air, the amazing snowy hills, and the excitement of rushing down the hill all help to improve the feelings. Snow sports also get you in natural sunlight, which helps increase vitamin D levels.

Winter sports offer more than just personal physical and mental benefits—they create chances for social interaction (交流) and community building. Whether you’re hitting the hills with friends, joining a ski club, or taking a family snowboarding trip, these activities form a sense of friendship. Shared experiences on the mountain create lasting memories and strengthen social ties, developing a sense of belonging and connection.

The benefits of winter snow sports spread far beyond the excitement of downhill drops. Winter activities not only keep you physically fit but also benefit your mental well-being and provide chances for social communication.

Winter wonderland is waiting for you, promising a season full of joy, health, and unforgettable experiences. So, when the snow arrives, consider putting on your skis and enjoying the benefits winter sports bring to your body and mind.

Humans have a way of understanding others’ goals, desires and beliefs, a crucial skill that allows us to anticipate people’s actions. Taking bread out of the toaster? You’ll need a plate. Sweeping up leaves? You’ll grab the green trash can. This skill, often referred to as “theory of mind”, comes easily to us as humans, but for robots it still has a high mountain to conquer.

In a recent study, computer science researchers made the robot “watch” the human complete the task using a camera placed directly above the assembly(组装)area, looking down. To detect the parts operated by the human, the system used AprilTags, similar to QR codes, attached to the parts. Then, the system used machine learning to learn a person’s preference based on their orders of actions in the task. “Based on how a person performs the small assembly, the robot predicts what that person will do in the larger assembly,” said Nemlekar. “For example, if the robot sees that a person likes to start the small assembly with the easiest part, it will predict that they will start with the easiest part in the large assembly as well.”

In the researchers’ user study, their system was able to predict the actions that humans will take with around 82% accuracy. “We hope that our research can make it easier for people to show robots what they prefer,” said Nemlekar. “By helping each person in their preferred way, robots can reduce their work, save time and even build trust with them.”This technology could also be useful in industrial settings where workers are tasked with assembling products in large numbers, saving time and reducing the risk of injury or accidents. Additionally, it could help persons with disabilities to more easily assemble products and maintain independence.

“Our goal is not to replace humans on the factory floor. I expect similar findings in other applications as well,” said Nikolaidis. “A robot that can quickly learn our preferences can help us prepare a meal, rearrange furniture or do house repairs, having a significant impact on our daily lives.”

Deforestation in tropical (热带的) regions of Asia, Africa and the Americas has reduced the cooling effects of trees. “The temperature change associated with deforestation over the 15-year study period is equal to a century of global warming, happening almost instantly, at these locations,” says Luke Parsons at Duke University in North Carolina.

Now, by using data from population surveys and mapping tree cover loss over a 15-year period, Parsons and his colleagues have estimated the effect of deforestation on outdoor workers across 41 countries. He says climate change has already pushed tropical locations right to the edge of what would be considered safe for heavy outdoor labour and that deforestation causes those locations to be even more precarious.

Parsons and his colleagues used land surface temperature measurements from satellites, and collected humidity (湿度) data, to estimate how hot an average day felt to outdoor workers in regions which either lost or maintained tree cover between 2003 and 2018. “The study focuses on what you would think of as a ‘feels-like’ temperature. It takes into account how well you can cool yourself by sweating, which is affected by humidity, as well as the temperature,” says Parsons.

The researchers then turned to population surveys to estimate the number of outdoor workers in these areas. This revealed that some 2.5 million outdoor workers in Asia lost at least half an hour of safe work per day, between 2003 and 2018, due to increased temperatures in deforested regions. Nearly 200,000 outdoor workers in the Americas and some 31,000 people in Africa lost this amount of safe work time each day. Regions that maintained forest cover generally stayed cool, and less work time was lost.

It is important to remember that, due to the scale (规模) of the study, the team didn’t measure actual worker hours on the ground across the entire tropics, says Parsons. This means the assessment of lost worker hours is based on theoretical considerations rather than direct observations of behaviour.