Owls(猫头鹰)can be found in many parts of the world. And today, one kind of owl, the barred owl, is causing a problem in forests of the northwestern United States. Barred owls are a large species native to eastern North America, but they began moving west at the start of the 20th century. In parts of the Pacific Northwest, barred owls are now causing a drop in the population of a kind of smaller and less aggressive(侵略性的) bird: the northern spotted owls. The U.S. Geological Survey is doing something unusual to protect spotted owls: killing barred owls. As a member of the department, David Wiens has mixed feelings about the program. “It’s a little unpleasant, I think, to go out killing owls,” he says. “But we knew that barred owls were really stronger than spotted owls and their numbers were growing too fast, so it makes sense to do that.”

It is a controversial( 有争议的) program. “A decision not to kill the barred owl is a decision to make the spotted owl disappear,” says Bob Sallinger, a director at the nonprofit Audubon Society in Portland, Oregon. However, Marc Bekoff, a professor of ecology(生态学 ) and biology at the University of Colorado, Boulder, strongly disagrees with the experiment and says humans should find another way to help spotted owls.

If reducing the barred owl population improves the number of spotted owls, the U.S. Geological Survey may consider killing more barred owls as part of a longer-term effort. Enough success has been noted for the experiment to be extended to August of 2021.

We all know that some animals adapt to living in very cold environment, like polar bears in the frozen Arctic. But what about the opposite situation? How do animals become adapted to the life in very hot places? A great example of animals beating heat is the camel living in deserts.

A major problem for camels in deserts is the temperature. It’s hot and dry during the day and can be very cold at night. So their fur can not only protect them from the burning sun at daytime, but also help keep warm at night. Another thing is that camels have long necks and legs, so they have large surface area to lose heat easily. They can stand body temperature above41℃, which would be really damaging to living creatures like us humans. And how can they manage to travel a long distance without water at all in deserts? They have large flat feet to spread their weight on the shifting sand. They store fat in their humps to keep them from getting hungry or dehydrated. This helps when they’re not able to find food or water for long periods of time.

In addition to these, camels have other ways to adapt to their environment. In a desert, it can sometimes get very dusty. However, camels don’t mind since they have extremely thick and long eyelashes which protect their eyes from blowing sand. Sand up the nose can be a problem, but not for camels. They can shut their nostrils during sandstorms.

Rome is recognized across the globe for its classical artwork, but recently the city's street art has been drawing attention. While many urban artists stick to painting murals（壁画），one Italian sculptor is resisting the trend with his wonderful works made from an unusual material. Andrea Gandini, a native of Rome in his early twenties, has been recognized for his wood carvings of old tree trunks scattered across the city's landscape.

Gandini's Trocomorto, or "dead trunk" project, began in 2018, when the artist ran out of sculpting clay. That's when he noticed the remains of an old tree stump in his neighborhood. He realized that Rome was full of potential canvases（画布）just waiting to be given a new life. "Bringing trees back to life" is exactly how Gandini and others describe his art.

Due to years of poor care by the city, many trees became diseased and had to be cut down. This resulted in lots of old stumps that degraded the streets of Rome, which were costly to remove. However, they have been a perfect canvas of Gandini, who has completed over 50 carvings across the city.

Gandini gives each old tree trunk a face and personality of its own. By recognizing each formerly living tree as individual, he hopes to give them some dignity in death and respect each of them with their own headstone of sorts. For those that can't make the trip to Rome, Gandini documents his works of art on Facebook.

Gandini's “dead trunk" project reminds us of what Auguste Rodin says, "There is no lack of beauty in the world, but a lack of eyes to find it." All is beautiful in the eyes of the artist, for his keen eye sees through the heart of all living things. To discover its character is to pierce its outer form and touch its inner truth. This "truth" is also "beauty".