1 . A British company has proposed releasing a GM(genetically modified) strain of the diamondback moth (菱形斑纹蛾), which has been developed to help reduce the population of these vegetable-eating insects.

Male diamondback moths carrying a deadly gene would be released which would cause their off springs (后代) to die almost immediately. Then the fall in their numbers could help to increase crop yields for farmers.

Oxitec, the company which came up with the idea, hopes to begin trials next year but faces opposition from groups who say the untested technology could threaten wildlife and human health.

“Mass releases of GM insects into the British countryside would be impossible to recall if anything went wrong. Changing one part of an ecosystem can have knock-on effects on others in ways that are poorly understood. This could include an increase in different types of pests. Wildlife that feeds on insects could be harmed if there are changes to their food supply” said Dr Helen Wallace, the director of Gene-Watch UK, who has sat on government advisory bodies.

Hadyn Parry, Oxitec’s chief executive, said there was demand from farmers for the technology and that using GM insects to kill the pests that feed on food crops is better for the environment than chemical sprays. The firm, which is supported by grants from the taxpayer, is developing a number of GM insects that would be used in Britain and around the world to protect crops and combat disease in humans.

Oxitec has contacted the Health and Safety Executive (HSE) to ask what controls, if any, should be put in place around GM moth trials. A spokesman said that while its officials and advisers have discussed Oxitec’s plans, there is yet to be a formal application for a trial. Consequently the department has not reached a view on whether it should go ahead.

3 . Sharks have been swimming in the ocean for millions of years. They were on Earth even before dinosaurs! At the top of the world’s ocean’s food chain, sharks help keep the population of other ocean animals in balance. A large drop in the number of sharks can cause serious problems for all ocean animals. Saving sharks makes sense!

Many people are afraid of sharks. But most sharks are harmless. Only a small percentage of sharks are known to attack humans. They adapt well to new habitats and eat whatever is available. However, today, sharks are in trouble. Nearly one third of the 400 shark species are in danger of extinction, largely due to over-fishing. Each year, tens of millions of sharks are caught and killed just for their fins. The fins are used to make shark fin soup.

Humane Society International(HSI) joined with the Jane Goodall Institute’s Roots and Shoots program and Beijing Zoo to protect sharks. An exhibit at the zoo, “The Price Behind the Taste—Protect Sharks. Don’t Eat Shark Fins”, was designed to tell people that shark finning is cruel and unnecessary. It’s hoped that the activity will help put an end to the practice.

Shark fin soup is also eaten in the United States. In fact, the numbers of some shark species in US waters have dropped 90 percent in the last 30 years. To slow the fall, laws against the sale of shark fins have been passed in several states, including Hawaii, Oregon, Washington, and California.

4 . A kitchen garden produces vegetables for delicious, healthy meals. It doesn’t have to be right outside the kitchen door, but the closer it is, the better.     1    , the more likely it is that you will get tasty things out of it. Just a few steps are needed for what you want.

    2    . The most important recommendation is start with what you like to eat. This may go without saying, but I have seen first-year gardens that don’t reflect the eating habits of their growers. One of the easiest and most rewarding and popular kitchen gardens is a simple salad garden. It can produce multiple harvests in most parts of the country.

Planting a garden: where, when and how. Make a garden plan of what will be planted, where, when and how.     3    . It means you should know what they like in terms of space, water, soil fertility (肥力) and soil temperatures.

When and how much to water your garden. Vegetables are made mostly of water.     4    .You’ll want to water them lightly every day or two. If nature isn’t providing that amount of rain, you’ll need to water by yourself or with a drip irrigation system.

Garden maintenance: keep an eye on it. Sun and rain willing, fast growers such as radishes (萝卜) and salad greens will begin to produce crops as early as 20 to 30 days after planting. Check on them regularly so you get to harvest them before someone else does.     5    .

As the Internet calls him, Terry Lauerman is     1     first of his kind, a professional cat napper (打盹的人). Terry has been in his local pet sanctuary for many years. And since he has started, he doesn’t plan     2    (stop).

Terry’s love for cats     3    (date) back to his younger years but he’d never quite been able to work with     4    (they) until he retired. He spent his free time     5    (volunteer) at this local shelter.

Terry would sometimes take a cat nap with a few of his cat     6    (friend). By taking a nap so     7    (comfortable), Terry has actually done more for the cat shelter     8    others. It started when the shelter began posting pictures of Terry’s napping breaks and he went viral (走红),     9    led him to encourage people to donate a few dollars for the cats. And it worked. Within days, a generous     10    (donate) of tens of thousands of dollars had been given to the shelter in his name.

8 . Four reasons to adopt a dog

If you haven’t already experienced the unbelievable joy of adopting (收养) a dog, this year is a great time to feel the love.     1    ? Here are some great reasons.

Even your closest friends and family members trouble and are troubled by you occasionally.     2     . You just take him to take a walk or just check out that wagging (摇摆) tail and happy bark when you return from work. Your dog loves you unconditionally!

Each year, 2.7 million dogs die in shelters because there just aren’t enough people to adopt them. When you adopt from a shelter or rescue group, not only are you saving that dog, but you’re clearing up space for another animal that might need it.

    4    , dogs are typically more social animals, wanting to hang with their people. Whether you’re reading, or working on the computer, your dog will likely be at your side or curled up at your feet, enjoying your company. A study published in the Journal of Personality and Social Psychology found that dog owners are less lonely, less depressed, and are happier and have higher self-esteem than those without dogs.

There are all sorts of studies that show links between dog ownership and health benefits from lowering the risk of heart diseases to living longer lives.     5    , and children born into a home with a dog have a reduced risk of development all diseases.

9 . New findings suggest that when it-comes to learning, the snake may be quite a bit like humans. David Holtzman, a scientist at the University of Rochester, has found that snakes have a much greater capacity for learning than earlier studies had indicated.

Holtzman’s study challenged 24 snakes to escape from a black plastic container the size of a child’s pool. Cards mounted on the container’s walls and tape on its floor provided the snakes with visual and touchable signals to find their goal: holes in the container’s bottom that offer a dark, comfortable spot to hide.

Simply falling into a hole isn’t the only proof that the snakes are learning something, though. “Speed to find that goal is one of the measures which shows they’re learning,” Holtzman says. “On average, they take over 700 seconds to find the correct hole on the first day of training, and then go down to about 400 seconds by the fourth day of training. Some are actually very fast and find it in less than 30 seconds.”

Studies dating back to the 1950s interpreted snakes’ awkwardness with mazes(迷宫)as a poor reflection on their intelligence. “Early attempts to study snake intelligence were problematic because the studies used mazes as testing arenas(场地)-as though snakes might be expected to run through mazes in the same way mice run through mazes,” says Peter Kareiva, a professor of zoology. “Snakes do not encounter anything like mazes in nature, and they do not learn how to run mazes in laboratory conditions.”

Holtzman also found a few age-based differences in the signals the snakes use. Young snakes appear to be more adaptable and resourceful, using a variety of clues to find their way to the exit.But their elders seem to rely much more heavily on visual clues. “Actually, one of the amazing findings from our studies is that snakes do use vision in locating places,” says Holtzman. “They don’t just rely on the chemical clues picked up by sticking their tongues out, as many snake biologists assume.”

10 . When astronauts land on Mars, a couple of decades from now, perhaps, they’ll need to find a way to communicate-with each other, with equipment on and around the planet, and with mission control back on Earth. Despite living so far from home, they’ll no doubt want to connect with loved ones, or stream their favorite shows or music.

But setting up a Wi-Fi connection to Earth’s internet won’t be a choice. Earth is simply too far away—around 55 million to 400 million kilometers, depending on where the planets are in their orbits. We will need another strategy.

Establishing good communication equipment is essential for human missions to Mars. Researchers are testing ways to upgrade existing networks, along with some far-out alternatives. For example, NASA’s Psyche mission, which lifted off in October with the job of exploring an asteroid (小行星) between Mars and Jupiter, will also test the communication using lasers. Lasers could carry far more data than the radio waves that have been used from the earliest days of space travel.

There is no strategy which can get rid of the time lag in communications between Earth and Mars; a message moving at the speed of light takes anywhere between 4 and 24 minutes for a one-way trip. In other words, a quick ping to mission control is out of the question, not to mention a WhatsApp call home.

There’s also the issue of solar conjunction (聚合), says Parfitt, when the sun comes between Earth and Mars. This happens for a couple of weeks every two years or so, cutting off communications between the planets. The last one took place in November.

But new approaches could open possibilities that make communications on Mars more like what we experience here on Earth. At least one research team has wondered: What if Mars had its own internet?