【推荐1】On Thursday, scientists in Indonesia announced the discovery of a rare frog that has no lungs and takes breath through its skin. Researchers believe that the little animal could provide some information about how environment can cause some animals to change so greatly over time.

The frog was found in a faraway part of Indonesia during a scientific research last summer. The unusual animal is the world’s first know lungless frog species. Only a few amphibians have been found lungless.

David Bickford is a biologist at the National University of Singapore. He led the research team that discovered the rare frog. Its living environment has been polluted by chemicals from agriculture. “These are about the most ancient and bizarre frog you can get on the earth,” he says.

Bickford says it’s possible that the frog may have changed in order to adapt to the cold, fast moving and oxygen-rich rivers in which it lives. The biologist adds that his “extreme change” was probably necessary to reduce the frog’s ability to float. That way, it could keep itself from being swept down the mountain rivers.

Scientists say that the new discovery has made it more important to protect the frog’s river living environment. In the last few years, illegal tree cutting and gold mining have caused the once-clean waters to turn brown with pollution.

“The gold mining is completely illegal and small size,” Bickford says. “But when there are thousand of them on the river, it really has a huge effect. Very soon the frog will be out of the river.”

【推荐1】While the human world is suffering from the novel coronavirus outbreak, our planet is actually showing certain signs of “recovery” from the damage caused by human activity. According to the BBC, new satellite images released by the European Space Agency showed that levels of air pollutants and greenhouse gases have “fallen sharply” in major cities in Europe and the United States ever since the lockdown started.

This is what happened after recent discoveries in Antarctica. An international team of 89 scientists found that the ice in Greenland and Antarctica is melting six times faster in the 2010s than it was in the 1990s. And in February, Argentina’s Marambio research station in Antarctica recorded a record high temperature of 20.75 ℃ on the continent.

So what exactly will happen if the temperature keeps rising and the ice keeps melting? A third study might give you an idea. A team of scientists drilled a hole into the seafloor in west Antarctica and extracted (提取) material from underground, in which they found traces of roots, spores and pollen—typical products of a rainforest—that dated back 90 million years ago. In other words, Antarctica was very likely a rainforest back when the dinosaurs walked on Earth. But given the fact that the South Pole has four months of darkness during winter—even millions of years ago—scientists believe that the rainforest could only exist if the greenhouse gas concentrations were extremely high back then to keep the continent warm when there was little or no sunlight.

“We didn’t know that this Cretaceous (白垩纪的) greenhouse climate was that extreme,” Johann Klages of the Alfred Wegener Institute in Germany and a co-author of the research told the Guardian. “It shows us what carbon dioxide is able to do.”

Ice or no ice, Antarctica will be—and has always been—fine with extreme changes. The human world, however, may not be.

Now, during the coronavirus lockdown, we’ve seen the changes resulting from less human activity. Hopefully, we’ll hold on to those changes—not for Antarctica or the planet, but for ourselves.

Paper cutting is one of China’s most popular folk arts. Archaeological (考古学上的) finds show that the tradition started in the 6th century, it is even supposed that the beginning of paper cutting is even a few centuries earlier.

Paper cuts have special importance at festivals and on holidays. To get rid of (摆脱) the old and bring good luck, people put up paper cuts on the windows on the Eve of the Spring Festival.

Paper cuts are not produced by machine, but by hand. They are done all over China, but are different in the method in different areas. There are two methods of making paper cuts—by using scissors (剪刀) or knives. As the name suggests, scissors cuttings are made with scissors. Several pieces of paper (up to eight pieces) are placed together. The patterns are then cut with pointed scissors. Knife cuttings are made by putting several pieces of paper on a table. Following a pattern, the artist cuts the patterns into the paper with a knife.

In the past, paper cuts were usually made only by women and girls. They used scissors and paper to cut all kinds of pictures such as apple tees, peach blossoms, mice, fighting roosters (公鸡) and rabbits eating carrots.

This used to be one of the skills that every girl was to master. Professional paper cutting artists are, on the other hand, almost always men who can make a living by working together in workshops.

【推荐3】“The pile of ice is so thick; it extends more than 10, 000 feet above the ocean. And if all that ice were to melt and go into the ocean, global sea levels would rise by about 24 feet everywhere around the world,” said Jason Briner, a geologist who studies the ice sheet in Greenland at the University of Buffalo. The ice sheet of the biggest island in the world is melting, and the ice sheet that sits atop it is massive. The ice sheet is melting, of course. But just how much, compared to the past?

Briner’s team did a computer simulation (模拟) of the southwest part of the Greenland ice sheet — which he says is a good indicator for ice melting across the entire ice sheet. The researchers plugged past climate data into that model to “hindcast,” rather than forecast, the past activity of the ice sheet. They then checked the model’s predictions of the past shape and size of the ice sheet by looking at piles of rocks and dirt on Greenland today, which outline the edges of ancient ice. And the simulation was in good agreement with the actual situation.

Using that reconstruction of the ice sheet over time, the team could compare the ice sheet’s historic losses to those happening today under human-caused global warming. And they determined that Greenland is on track to lose more ice this century than during any century in the past 12,000 years — possibly four times as much.

Finally, it’s up to us how much ice actually melts. If the world goes net carbon zero by 2100, for example, Briner says ice loss could stop entirely at the end of the century, according to one model. “That was what kept me from being completely depressed about our study.” Dozens of countries have already announced goals to go net zero by the middle of this century — so far the U. S. is not one of them.