【推荐1】A fisherman I know named Joar Hesten called me late in April last year. A beluga whale was swimming around his boat near the northern tip of Norway. It appeared to be wrapped in a tight harness (套子), and Hesten didn’t know what to do. Belugas are usually found in groups in areas with ice and glaciers (冰川) —rarely alone along the Norwegian coast. As a marine biologist, I knew that the harness needed to be removed as soon as possible. I had no idea how puzzling it would turn out to be.

We contacted the local government. When inspector JørgenRee Wiig and his crew met with the fishing boat, they doubted Joar Hesten had clearly been trained. The mystery deepened when he got into the water to remove the belt. Attached to the harness were a camera mount (支撑架) and clips with the words (in English) “Equipment St. Petersburg.” The stuff didn’t look like anything that a scientist would use to track whales. The rescuers and I wondered whether he’d been trained for a special purpose. We named him Hvaldimir—the Norwegian word for “whale”.

A week after his discovery, Hvaldimir followed a sailboat to Hammerfest harbor, about 25 miles from where he was first spotted. He was thin: He wasn’t eating on his own and seemed unlikely to survive in the wild. Later the authorities decided to feed him; his meals became daily tourist attractions in Hammerfest. Hvaldimir became so popular in Hammerfest that rules had to be posted for interacting with him.

Yet when I slipped into the water to examine Hvaldimir, I was most struck by his friendliness—and his loneliness. During our swim together, Hvaldimir pulled off one of my flippers (脚蹼), which sank into the deep. I shouted to him underwater, and he dived for it. A few minutes later, he returned with my flipper balanced on his nose and presented it to me.

In June Hvaldimir left Hammerfest, in much better shape than when he arrived. Since then he has traveled along the coast of northern Norway, apparently feeding himself.

【推荐2】Help Hermit Crabs

Hermit crabs are nature’s recyclers. They eat waste and help keep oceans and shores clean. Unlike other crabs, the hermit crab has a thin outer shell over its soft tail. This makes the hermit crab easy prey for hungry predators. Hermit crabs stay safe by living in old seashells. A hermit crab is picky; it tries on many shells until it finds one that fits just right. In recent years, however, many hermit crabs have had trouble finding their perfect homes. What is the problems There are not enough shells to go around!

One reason for the seashell shortage is that ocean water is not as clean as it once was. This has caused chemical changes to sea water. Some sea animals, like snails, are affected by these changes. Now there are fewer snails making shells. People visiting the beach often take shells home as souvenirs. This is another problem. Other people even take shells for their own pet hermit crabs! They do not realize that hermit crabs in the wild need those shells too.

Now people are working to solve this hermit crab housing shortage. They are teaching beach-Boers to leave seashells where they belong — at the seashore! Some people even make fake seashells that they hope the hermit crabs will like. For example, a group called Project Shelter invited people who visited their website to create different designs for hermit crab shells.

These designers had a lot to consider. What kind of material should be used to build a seashells. The material must be light enough for the hermit crab to carry, but strong enough to protect the crab from predators. The man-made shells could not contain glue or any other substance that might harm a hermit crab. Another challenge with building a hermit crab home was the opening to the shell. Too big would mean the crab would not feel safe. Too small would be uncomfortable, and the crab would not want to move in.

The Project Shelter shells are placed in the wild for hermit crabs to find. Lucky hermit crabs can move into these new dream homes.

【推荐3】For centuries, in the countries of south and Southeast Asia the elephant has been an intimate part of the culture, economy and religion, and nowhere more so than in Thailand. Unlike its African cousin, the Asian elephant is easily domesticated (驯化). The rare so-called white elephants have actually lent the authority of kingship to its rulers and until the 1920s the national flag was a white elephant on a red background. To the early Western visitors the country’s romantic name was “Land of the White Elephant”.

Today, however, the story is very different. Out of work and out of land, the Thai elephant struggles for survival in a nation that no longer needs it. The elephant has found itself more or less abandoned by previous owners who have moved on to a different economic world and a westernized society. And while the elephant’s problems began many years ago, now it rates a very low national priority.

How this reversal from national icon (圣像) to neglected animal came about is a tale of worsening environmental and the changing lives of the Thais themselves. According to Richard Lair, Thailand’s experts on the Asian elephant and author of the report Gone Astray, at the turn of the last century there may well have been as many as 100,000 domestic elephants in the country. In the north of Thailand alone it was estimated that more than 20,000 elephants were employed in transport, 1,000 of them alone on the road between the cities of Chiang Mai and Chiang Saen. This was at a time when 90 percent of Thailand was still forest — a habitat that not only supported the animals but also made them necessary to carry goods and people. Nothing ploughs through dense forest better than a massive but sure-footed elephant.

By 1950 the elephant population had dropped to a still substantial 13,397, but today there are probably no more than 3,800, with another 1,350 roaming free in the national parks. But now, Thailand’s forest covers only 20 percent of the land. This deforestation is the central point of the elephant’s difficult situation, for it has effectively put the animals out of work. This century, as the road network grew, so the elephant’s role as a beast of burden declined.

【推荐2】There are a lot of wild camels in Australia. Although they don’t appear to be as destructive as other introduced species because they eat trees and plants that our native Australian animals don’t eat, in the last few years the Australian Camel population has been increasing at a fairly alarming rate and becoming a bit of a problem.

We didn’t see them that often where we grew up unless we went further into Queensland or South Australia. When we did see them it was always a bit of a thrill for us kids because it was somewhat of a novelty.

The suggestion of bringing camels to Australia was first made in 1837, 49 years after Europeans arrived in Australia. The importing of camels into Australia began in the mid 1800s to open up the desert areas of Central and Western Australia. They were handled and cared for by Muslim cameleers that came from countries like Egypt, Turkey and northern India. The cameleers were called Afghans or “Ghans” even though most of them were not Afghans. The name stuck to a part of the railroad track that links Port Augusta in South Australia to Darwin in the Northern Territory.

In a famous 176-kilometre race, between Bourke and Wanaaring in New South Wales a camel was beaten by a horse but the horse died the next day while the camel was ridden back to the starting point.

By the 1920s there were about 20, 000 domesticated camels in Australia, but with the arrival of motor and rail transport in the 1930s people no longer needed their camels and a lot of them were abandoned in the bush.

Australian Camels are now exported live to Saudi Arabia, the United Arab Emirates and other countries where disease-free camels are considered a delicacy. Australian Camels are also exported to Arab Camel racing stables as breeding stock. The United States also imports them to use in tourist attractions. There are over 40 farms providing rides in Australia now.

【推荐3】According to Dr. John Swaddle, a professor at the Institute for Integrative Conservation at College of William & Mary, hundreds of millions of birds die every year from window collisions.

However, if you put decals(贴花纸)or colorful stickers outside of your windows, the birds are more likely to see the barrier and therefore avoid it. Remember: never inside your window; always outside of your window.

“Double-glazed(双层的)windows reflect a lot of light, especially when you view them from a slight angle, as a flying bird would do,” Swaddle told Salon. He is the corresponding author of a recent study which tries to figure out how this basic reality of physics impacts on a bird’s experience as it flies near a standard window. For their experiment, researchers had birds perform repeated and controlled flight trials near windows with film(薄膜)products, BirdShades film and Haverkamp film, respectively.

“In our collision avoidance trials, BirdShades increased window avoidance by 47% and the Haverkamp increased avoidance by 39%. But neither product was effective when the films were applied to the internal surface of windows,” the authors concluded.

When breaking down the problem of avoiding window collisions from a bird’s point of view, Swaddle explained, “The light and reflected imagery from the external surface of the glass is sufficient to obscure a film or decal that is stuck to the inner surface from being seen clearly.”

If you want to protect birds from easily avoidable deaths without buying window film products, there are other solutions. Swaddle recommended “pleasing fritted glass(烧结玻璃)that could be used in new construction and which is also bird-friendly”. Besides, he notes that screens can be helpful as well, not only by limiting reflectiveness but by providing birds with a cushion if they make impact. It is also possible to use everyday household objects to signal to birds that there are barriers — netting, bits of string, colorful stickers, and paint. These can all be used to this effect.

【推荐3】China landed a spacecraft on Mars for the first time last Saturday. This makes China the first country to make a successful landing on Mars on its first mission to Mars. China’s Zhurong rover (探测车), named after a traditional Chinese fire god, has touched down on the martian surface, the China National Space Administration confirmed on the morning of Saturday, May 15.

The rover is part of the Tian wen-1 mission, which consists of an orbiter, a probe, and a lander. The mission was launched in summer last year, and took seven months to complete its journey to the red planet. It arrived at Mars in February this year, and since then the spacecraft has been performing operations such as capturing images of Mars.

Believe it or not, traveling to Mars is actually the easy part of such a mission. The truly hard part is landing on the planet’s surface, as landers must contend with factors like the planet’s thin atmosphere, its variable dust storms, and a communication delay between Mars and Earth. This delay makes it impossible for people in mission control on Earth to control a craft in real time as it approaches the planet, so the landing must be performed autonomously.

To slow its speed as the lander approached the surface, it used both a parachute (降落伞) and a retrorocket (减速火箭) in its own “seven minutes of terror” as it moved through the atmosphere. It then landed in the Utopia Planitia area, a large impact basin, part of which was exploded by NASA’s Viking 2 lander in the 1970s.

According to China’s slate news agency Xinhua, President Xi Jinping said he was sending “warm congratulations and sincere greetings to all members who have participated in the Mars exploration mission.”

The rover will now begin its three-month mission to explore the Utopia Planitia area, where it will be searching for surface and subsurface ice. The mission will involve both the rover and the orbiter working in concert to create a map of water ice, with the orbiter focusing on the planet’s polar regions.