No matter where you live or how you define yourself, these are some of the best activities to get in touch with nature.

Hiking

    One of the easiest and most accessible ways to get close to nature is by setting out on a good old hike. Hiking generally doesn't require any special equipment or special skills; just a good pair of boots, a map, and a thirst for adventure. This activity can be as relaxing as you make it. Suggestion: consider doing a little advance research on Trails.com or EveryTrail.com.

    Backcountry Camping

    Why limit yourself to just a day hike when you can have a full weekend (or longer) adventure? Backcountry camping involves packing your tent, sleeping bag, food，and water on your back to set up camp in a remote location. If you're an experienced hiker and camper, this is an excellent way to test your survival skills and explore the wildness. Many parks require backpackers to obtain permits, so make sure to register and map your route before stepping on the trail.

    Mountain and Road Biking

    Unlike long hikes through the woods, biking allows you to cover more ground and travel farther while still being in nature. Mountain biking typically involves riding up and down steep slopes, between trees, and over rocks. If this sounds too intense or your tires aren't suited for a rocky path, consider taking a road bike or a hybrid on paved trails through forest preserves or along country roads.

    The end of the school year is in sight — Christmas cards, candy canes and of course, end of year reports.

    While most parents welcome an assessment of their kids' performance, they do not expect their own input to be evaluated. But a school in the UK is changing that. As well as assessing their students, they are dishing out grades to mums and dads. Parents that are really involved in their kids' education are rewarded with an A, and parents that haven't done their bit get a disappointing D.

    The school, Greasley Beauvale Primary in Nottinghamshire, uses standard such as whether mums and dads have attended school events such as plays and parent teacher evenings to decide on the grade. The school's principal, Donna Chambers, said that the scheme had been well received.

    “There were some critics. In spite of it, between 15 per cent and 20 per cent of parents started out in the lower categories but now that has been reduced to just two per cent,” she explained.

    Chambers hopes that the scheme will help motivate parental involvement. “The system is important because you have got to get the parents on board from day one. That one hour initial conversation saying they could improve will make a difference to the rest of that child's academic life”, she said.

    But while the scheme may be well intentioned, it is likely to be connected with parent shaming. There are lots of reasons why some mums and dads might not be involved in school activities such as work commitments, looking after younger children or caring for elderly relatives.

    And of course, being involved in your kid's education doesn't begin and end at school. There is a lot that goes on behind the scenes from helping with homework to keeping uniforms freshly laundered. And what about all the parents who stayed up sewing special costumes at the last minute? Surely that earns a gold star instead of a grade!

    Last Saturday on the way to the mall, two children, a boy and a girl, came running towards me with bottles in their hands, asking if I wanted bottled water. It was a surprising gesture. I was wondering if they were doing fund-raising. I knelt and asked them where their parents were and how much a bottle of water cost. Then two adult women came up to me explaining what the children were doing. “We are teaching the children to give without anything in return. We are teaching people to accept without giving in return.”

    Two mothers had bought bottled water and placed a sticker on all bottles with five different quotes (引述):

    ⒈Smile at everyone. You'll never know when someone may need it.

    ⒉If Plan A does not work, there are 25 more letters in the alphabet.

    ⒊Have a thirst for life. Every day is filled with possibilities.

    ⒋In your thirst for knowledge, be sure you don't drown in all the information.

    ⒌Dig your well before you're thirsty.

    The bottle I have has quoted No.5. A sudden change of attitude opened up between me, the mothers and the children. We are no longer strangers to each other. We were having such a great time chatting and I ended up helping them give away the rest of the bottled water.

    One young lady was so thankful that she happily accepted the water and said it was the best thing that happened to her all day since she had a bad day at work. A man refused and walked away saying “No, thanks”. A couple kept on bowing to us in gratitude. When it was all done, the children and I were giving each other high-five. It was so remuch fun. I think I had more fun doing this than the mothers and the children.

    A butterfly's wings can have many jobs besides keeping the insect in the air. They may be called on to attract mates, to warn potential enemies to stay away, to do other animals or even to provide disguise(伪装).

    All of these roles, though, depend on their colouration-which is unchanging. This plays into the idea that butterfly wings are dead tissue, like a bird's feathers or a mammal's hair. In fact, that is not true. For example, in some species males' wings harbour special cells that release chemicals which attract females.

    Nanfang Yu, a physicist at Columbia University, in New York, has been looking into the matter. One of his interests is the optical (光学的) properties of biological materials. That has led him to study butterfly wings in more detail. And, in cooperation with Naomi Pierce, a butterfly specialist at Harvard University, he has now shown, in a paper published this week in Nature Communications, that butterfly wings are, indeed, very much alive.

    Initially, Dr Yu and Dr Pierce wanted to know how the insects keep their body temperatures up without their wings overheating. Unlike birds and mammals, butterflies do not produce enough internal heat to metabolize(新陈代谢). Instead, they rely on outside heat sources-usually the sun-to bring their bodies up to speed. But their wings, being thin protein membranes (膜), have a limited thermal capacity. Those wings can therefore overheat quickly if the insects are exposed to the sunlight too long, or, oppositely, can cool down too rapidly if they are flying through cold air.

In their experiments, the two researchers used a laser (激光) to heat up spots on the wings of dozens of butterfly species. When the temperature of the area under the laser reached 40℃ or so, the insects responded within seconds by doing things that stopped their wings heating up further. These actions included a butterfly turning around to minimize its exposure to the laser, beating its wings or simply walking away.

Bright and early on the morning of our first full day in Antarctica, L' Austral's Captain Fabien's voice woke us up as it came through a loudspeaker. If we looked outside right now, he said, we'd see a beautiful sea of icebergs in the golden sunlight. My sister and I jumped out of bed, staring in amazement as we sailed past giant pieces of ice. In the distance, we spotted a group of humpback whales feeding on smaller fishes. Next door, my parents were also waking up to the sights of a new day in Antarctica. Over breakfast, my sister and I excitedly told them about the whales we saw from our room that morning.

You might not immediately think of "family vacation" when talking about a trip to Antarctica, but tour companies like Adventures by Disney are changing that. The company offers guided group trips to destinations across all seven continents in the world.

Our adventure started when we flew to Buenos Aires and explored the beautiful Argentine capital for a day. After leaving Buenos Aires, we flew to Ushuaia on an Adventures by Disney plane. Then, it was the journey toward the Drake Passage. After a speedy Drake Passage crossing, we reached Antarctica early, adding a half day to our scheduled four days on and around the continent.

To those unfamiliar with Adventures by Disney, the fact that you can experience Antarctica-the most distant, extreme continent-with Disney might be surprising. During the trip, there were thoughtful acts, from stamped postcards to send from an Antarctica post office to a champagne (香槟) party on our final stop of the journey; Adventures by Disney truly thought of everything for us. Antarctica is a life-changing destination packed with experiences that can't be copied. We experienced seasickness when travelling across the Drake Passage, hiked up ice hills alongside lovely animals, and had a taste of champagne. And honestly, it's going to be hard for the next family trip we may take to compete.