3 . 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 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 (松树) 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 which depend 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 which are huge disasters to forests and people alike. In contrast, prescribed fires can be used by forest professionals every couple of years to keep forest fuels at a proper and manageable level. They can also greatly reduce 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 work to promote fire on the landscape. Smoky Bear even has an updated warning: “Only YOU can prevent wildfires,” as the Forest Service has over the last few decades developed policies and measures to include prescribed fire as a useful tool, as well as continuing their work to prevent and fight wildfires.

4 . Reading a pup’s body language requires experience and expert guidance. Zazie Todd, a dog trainer and founder of the blog Companion Animal Psychology, weighs in on how to decode dogs’ behaviour.

1. If your dog looks remorseful (羞愧的) when you walk in the door and see a mess…

They’re expecting punishment but don’t necessarily know that what they’ve done is wrong. Alexandra Horowitz, a professor at Barnard College in New York City whose research focuses on canine (犬科) cognition, put that ”guilty” look to the test in 2009.     1     Subsequent research out of the University of Cambridge found no evidence that dogs can even feel guilty.

2. If your dog licks their mouth…

They’re stressed Recently, two European studies have highlighted the meaning of this licking.     2     The other determined that dogs lick their mouths—and also look away—in response to a mild threat. If you spot this sign, try reducing your dog’s stress levels.     3    

3. If you’re at the vet and your dog’s tail is down…

They’re anxious. Obvious signs of an unhappy dog include hiding or trying to leave the exam room, but commonly missed triggers range from a tucked tail and lowered ears to trembling.     4     Many vets now use food to make the experience more fun.

4. If your dog leans into you during a petting session…

They like it! If you’re unsure that a dog is enjoying being petted, stop, then gauge their reaction. This is called a consent test. If they choose to wander off, the session is over.     5     Preferred spots on their bodies are to either side of the chest and under the chin.

5 . Microplastics are one of the largest environmental problems we face. They are tiny bits of plastics less than 5 mm long. Now a tiny robotic fish that might help tackle one of the problems of plastic pollution has been invented by scientists in China.

The bionic little swimmers have been programmed to wiggle their way through water collecting microplastics as they go. The robofish are only 15mm long. Yet, they can travel quite quickly as they clean. They move by flashing a laser on and off in their tails. It causes the tail to flap side to side which drives the ‘fish’ forward through the water. As they swim along, any nearby microplastics get drawn towards the robots and stick to them.

Not only is their shape inspired by marine life but also is the material they are made out of. Instead of being made out of the traditional materials used for soft robots that can be damaged easily in the water, this one was made from a material that takes inspiration from mother-of-pearl. Mother-of-pearl is found on the inside surface of clam (蛤蜊) shells. As well as attracting microplastics, the material could also heal itself after being cut, still maintaining its ability to absorb microplastics. Because it’s so durable and can swim as fast as it does(for how small it is), the researchers say that it could be used for monitoring microplastics and other pollutants in the hard-to-reach places of complex underwater environments.

Microplastics have been found nearly everywhere. They’ve been found in our oceans, on top of mountains, in some of the food we eat and even in the stomachs of some marine animals. One of the biggest problems with microplastics is, because of their size, they are difficult to clean up. This is especially true of microplastics in the ocean. The scientists hope that their tiny fish-shaped robots can one day help tackle this global problem. At the moment, the robofish are something called proof of concept. It just means that the scientists were able to make something that proves their idea worked.

Now that the team has shown that their idea works, they are going to keep working on it. They hope to create new versions that can dive deeper and absorb more microplastics.

6 . There’s a popular misconception that rhinos are aggressive and stupid, but I discovered sensitive, affectionate animals. Weighing over a ton, black rhinos are unexpectedly agile and have an unpredictable nature-but, given reassurance, they can be very trusting. In the past few decades, their numbers have dropped dramatically. In recent years, I’ve helped look after rhinos being moved to sanctuaries (保护区), so they can form new populations in countries that have few left.

Last year, I helped on a project to fly five black rhinos from a private reserve in South Africa to the Serengeti National Park. Once there, the animals had to be kept captive for a few weeks to adapt to the new environment, in which time they lived in “bomas”-wooden enclosures (围场) with “bedrooms”, designed to create a calm space.

A couple of weeks before their planned release, the sky filled with smoke. Watching the flames rushing through the bush toward the bomas, I froze. Terrified that it would catch fire, my instinct was to release the rhinos, but hey hadn’t yet been fitted with transmitters. If I let them out into a bushfire and they were injured, we’d have great difficulty tracking them down.

So I dashed back to the bomas and called the rhinos to the bedrooms. Sensing the fear in my voices, they moved without hesitation and remained astonishingly calm. It was crucial the rhinos didn’t panic -they can easily hurt each other if they do.

Meanwhile, the rangers managed to beat the closest flames away. At last, after half an hour, the wind changed direction and the fire began to recede.

That we and the rhinos had escaped unhurt was a miracle. The teamwork of everybody there played a large part, and the rhinos were very much a part of that team. The relationships we’d built with them had proved crucial - had they or we panicked, all our work would have been in vain. Instead, two weeks later, they were released into the wild, ready to found part of a new population in the Serengeti.

7 . Coming into the town of Santa Catarina Palopó, in the highlands of Lake Atitlan in Guatemala, the first thing you notice is the bright colors. Most of the buildings along the main street are eye-catching, deep blues and greens, dotted with red and yellow to form diverse patterns and designs.

Santa Catarina Palopó was once a sleepy town of 5, 000 people, most of them dependent on agricultural work. But as agriculture began to dry up here, poverty came. To deal with poverty and promote econ on growth through tourism, a small but creative group of laborers, artisans, domestic workers and stay-at-home moms created the Pintando Santa Catarina Palopó project.

The project aimed to paint all 850 homes and buildings in bright colors to change the hillside town into a work of art. “We wanted to paint the houses with colors and figures that represent the community” says the project’s executive director Stephany Blanco. “Families can choose designs for their house that are representative of the family.”

One of the most representative characteristics of the region is the blue huipil, a traditional blouse which has been worn commonly by local women since the 16th century. That deep sky blue was chosen the primary color-for the Pintando project, with secondary colors found in the sunsets and the nearby lake to make the design more attractive. Inspiration was also found in local culture, symbols such as volcanoes, flowers, and the national bird of Guatemala.

Each week, local artists, community members and tourists pick up paintbrushes to make buildings colorful. “At first, the idea of the project was uncertain, but now you can see a considerable difference in the town,” Melissa Whitbeck said. “The color of the buildings is believed to improve the quality-of life of the people. It uplifts the people’s mood and encourages them to be proud of their hometown.”

8 . I was cutting up lettuce in the kitchen when I suddenly remembered watching a video about soaking the lettuce stub (莴苣残余部分) in water to grow a whole new vegetable. So I took out a wide-mouthed cup and placed the stub into it, gave it a little water, and placed it by the window.

On a snowy morning I noticed the first sign. A first small leaf from its heart spread out. A tiny green flag of hope. Beaten, but not defeated. This lettuce was not done living! Within days, it was impossible to see the cuts where I had removed the leaves. The growth was explosive. And when I lifted the blossoming head out of the cup, tiny root threads fell down, seeking for the earth. What is growing here? Lettuce or hope?

If I were a lettuce in a similar condition, I’d want to skeptically assess where I found myself before committing to full growth. Yet for this lettuce, my inadequate offering of water and a place by a window was enough for it to decide to reclaim itself again. It grew in a cup of water, in faith. This is the heart of this lettuce: alive, strong and fearless. It deserved a name. I decided to call it Monty.

Monty wanted to grow, as we all do. I think I gave him a little love and freedom. Those two were all he needed to return to himself. I see joy in this lettuce. The return to self is always an expression of joy, which is life itself. This is the tendency of all living things.

Monty still lives in a cup, but I’m going to transplant him outside. He deserves to become his full self. The only problem I see now is my ability to support Monty. I hope I have enough of a green finger.

I’m surprised to find myself where I am. Maybe Monty is, too. I have the same choice as he does: give in or start again. The prospect of starting again is discouraging. But my lettuce-friend, Monty, leads the way. I can only hope to be as brave.