Day 1

    I first heard of “Show Racism (种族歧视) the Red Card” when my friend Jill asked me to support their work. Basically, it's an organization which uses professional (职业的) footballers to help fight racism in sport and society. A few weeks later, he asked me if I wanted to do a bit more for them. I thought he probably meant for me to give money or do some voluntary work. But then he told me that a group of about 20 people were getting sponsored (赞助) to play the highest ever game of rugby (橄榄球) at 5,140 meters on Mount Everest.

Day 4

    We're making our way up to the base camp — that's where most climbers start their final climb to the top — and then, we'll play our game. Today we started out at 8 am. We had to cross three suspension bridges (悬索桥). One of them was so high that you couldn't see the bottom. Then we walked through some beautiful forest areas before we started a two-hour uphill hike to Namche Bazaar.

Day 10

    Base camp is basically just a lot of stones and tents. The walk up was really exhausting. Maybe if I was fitter, I wouldn't find this so hard, but then it was not just me — all of us got very short of breath.

Day 11

    Today we played our game. It was supposed to be a “friendly” game, and last night, we had agreed we'd just walk and not run. However, it was a really heated game and two players were even sent off. We only played for 14 minutes. I think someone would have got hurt if we'd played any longer! My team won and I scored the last try! Of course, none of this matters. What's really important is that we did it and we've raised a load of money.

    The World Health Organization report compared the “obesity-related behaviors” for youngsters across 42 nations. And it reveals UK kids are among the laziest.

    Among teenage girls, the Scots topped the league table for most screen time, with 80 per cent spending at least two hours a day on computers. Wales came fourth with 76 per cent, and England seventh with 75 per cent. Girls in Armenia and Albania were least likely to spend hours idling online.

    Screen time figures for boys were even higher. Wales was second in the European “couch potato” league, with 85 per cent glued to their screens for at least two hours. Scotland was third with 84 per cent, and England 15th with 77 per cent. Boys in Switzerland and Portugal were least likely to dedicate two hours a day to sitting in front of a computer.

    Lead researcher Dr. Jo Inchley, from the University of St Andrews, said social media was impacting on kids' health. She said,“ We know there are risks, such as cyber bullying and impact on mental health. Also, there are longer-term impacts on physical health from being sedentary. One of the main challenges is that this kind of activity (social media and computer use) is so much part of young people's lives these days.” She said more needs to be done to get kids moving throughout the day.

    Dr. Steven Mann, research director for UK Active said the findings were “alarming”. He said, “Modern life has changed, but when teens are spending hours having fun with Facebook, Instagram and videogames, they simply aren't getting the exercise that they need. These alarming inactivity figures show that playtime is over before it has started for too many children, putting them at far greater risk of future conditions like heart disease, cancer and type 2 diabetes.”

    Tam Fry, from the National Obesity Forum, warned Brit teens are now “slaves to hand-held devices”. And the WHO warns four in five fat teens will continue to struggle with their weight throughout life. The report also shows less than half of UK youngsters consume fruit or veg daily.

    You're happy to let your best friend borrow your mountain bike, but would you be willing to loan it out to a total stranger if you could make some money from the arrangement?

    That's the idea behind peer-to-peer (P2P) renting, a new model concluded by sites such as eBay and Craigslist. Instead of selling an idle (闲置) thing, you loan it to people in your town, get paid a small rental fee and gel it back when the borrower's done with it. In the past few years, almost a dozen websites have popped up promising to connect lenders and borrowers. For example, you can use GetAround to rent out your car or motorcycle, SnapGoods to rent out electronics and gadgets, ToolSpinner to rent electric drills and lawnmowers, Zaarly and Knb to rent out a little bit of everything else.

    Old as it may sound, P2P renting is more high-tech than before, with websites that avoid cash for credit cards. A user creates an online listing for the item she wants to rent out, choosing her own rental fee. When someone wants the item, he keeps it on an online calendar, and the two arrange a time and place for pickup. Each site operates a little differently, but all use technology to make renting easy, safe and relatively inexpensive.

    Why rent your idle things? You may not make a ton of money, but it is a good way to get some use out of idle things. The people who rent those goods are able to save thousands of dollars by renting instead of buying new.

    There may be other benefits. "It brings convenience, security and adventure," says Ali Hart, JustSharclt's spokesperson. “But, more importantly, we're really connecting people and building community, too."

    Get to know your neighbors and make a few dollars in the process? Sounds like a good deal.

    “We all know that exercise is good for us, but can you get the benefits without actually doing the exercise?” asks Michael Mosley.

    Having a hot bath or a sauna is a good way to soothe your limbs after exercise, but what happens if you do it instead of exercise? Dr. Steve Faulkner of Loughborough University asked me to take part in an experiment comparing the relative benefits of having a long, hot bath versus an hour of hard pedalling.

    For this study I join a group of volunteers who have all been fitted with monitors which continuously record blood sugar levels. Keeping your blood sugar levels within the normal range is an important measure of your “metabolic” fitness.

    The first part of the experiment is very relaxing, consisting of having a long, hot bath. While I sit in the bath, which they keep at 40℃, Steve closely monitors my core temperature. Once it has risen and stayed there, I am allowed out.

    A couple of hours after my bath I have a light meal. Since we want to see how having a hot bath compares with exercise we repeat the experiment.

    So what's the result?

    “One of the first things that we were looking at,” Steve says, “is the energy expenditure while you're in the bath and what we found was an 80% increase in energy expenditure just as a result of sitting in the bath for the course of an hour.”

    This is nothing like as many calories as cycling for an hour (which comes out at an average of 630 calories) but we do burn 140 calories, the equivalent of a brisk 30-minute walk.

    China and India are leaders in improving global(全球的) tree cover, a new study based on NASA research showed.

    They took a 31.8% part together of the total global new leaf area between 2000 and 2017. China played a major role, adding 25% to this increase, and India added 6.8%, followed by Canada and Russia. The study in the Nature Sustainability journal shows that more than 5.5 million square kilometers of green leaf area was added globally. Since 2000, there has been a five-percent increase in global green cover, it said.

    "The greening over the last twenty years shows an increase in leaf area on plants and trees which is as large as the area of the entire Amazon rainforest," Chi Chen, a Boston University researcher and lead of the study told Nature Sustainability. Large plantation activities to protect forests in China contributed nearly 42% to the country's green cover, and agriculture added another 32%. In India, 82% of the increase in leaf area was because of agriculture.

    "China and India take up one-third of the greening, but hold only nine percent of the planet's land area covered in green plants," Chi Chen told NASA Earth Observatory. "That is a surprising finding, considering the land degradation(退化) in countries with large populations."

    Boston University's research team first detected an increase in global green cover in the 1990s but were unsure about what contributed to the increase. Finally, with the help of NASA's Terra and Aqua satellites research, they managed to find out the increase in leaf cover from different areas and places.

A pair of researchers with Leibniz University of Hannover has demonstrated the means by which robots might be programmed to experience something similar to pain in animals. As part of their demonstration at last week's IEEE International Conference on Robotics and Automation held in Stockholm, Johannes Kuehn and Sami Haddaddin showed how pain might be used in robots, by interacting with a BioTac fingertip sensor on the end of a Kuka robotic arm that had been programmed to react differently to differing amounts of pain.

The idea of developing an artificial robot nervous system may seem contrary to all expectations, but Kuehn says doing so is important in the same way that it is good for humans to feel pain. "Pain is a system that protects us, "says Kuchn. "When we avoid the source of pain, it helps us not get hurt. "So when robots can feel and react to pain, they will become smart enough to avoid it. The more dangerous the robot registers the threat to be, the faster it will withdraw and avoid the source of danger. Additionally, Kuehn and Haddadin say humans working alongside robots that feel pain, especially those in heavy machinery, will be protected around them.

They have tested out some of their ideas using a robotic arm with a fingertip sensor that can detect pressure and temperature. It uses a robot-tissue patch(小片)modeled on human skin to decide how much pain should be felt and thus what action to take. For example, if the arm feels light pain, it slowly withdraws until the pain stops, and then returns to its original task; severe pain, meanwhile, causes the arm to go into a kind of lockdown mode until it can get help from a human operator.

Such robots are likely to raise a host of questions, of course, if they become more common —if a robot acts the same way a human does when touching a hot plate, are we to believe it is truly experiencing pain? Only time will tell of course, but one thing that is evident, Kuehn and Haddadin's work could lead to robots that are more human-like than ever.