【推荐1】ON TUESDAY, the Shenzhen team of Blue Sky Rescue, confirmed (确认) that two of its members had died trying to rescue 24 tourists.

According to the official news, it was on Monday that the rescue team received a call from 24 travelers, who were trapped, in a river valley.

The team responded immediately. However, when they helped the travelers, two team members got trapped by the rising river water. The next day, they were confirmed dead.

Who can rescue the rescuers? The question aroused a heated discussion among people. Most of them think we would rather such “heroic deeds” were not required. In the past several years, there have been many cases in which travelers, ignoring the signs saying certain areas are dangerous and off-limits (禁止进入的), ended up needing to be rescued. By so doing, they put not only their own lives at risk but also the lives of those who go to their aid.

Although the majority of travelers behave properly, some attempt challenging tasks that are obviously beyond their abilities.

The law has already made it clear that if a traveler or group gets into difficulties when entering unauthorized (未经许可的) regions, they must bear the costs of the rescue. The rules need strengthening to deter travelers from putting their own lives and the lives of others at risk.

【推荐2】At a school in North Carolina, Monica Mitchell-Giraudo, a French teacher, instructs 19 sixth-graders to gather into a circle.

“Okay, everyone, let's take a few mindful breaths, and think about our gratitude (感激) for Amy, who brought us apples for snack today,” says Monica. “What do you notice?”

“I notice my stomach is already growling (做隆隆声),” laughs Ben.

“My mouth is watering,” says David.

Next, the students hold and examine the apples. They pick up the fruit and feel it. Then they bring the apples to their noses, using their sense of smell to enjoy the flowery smell of their snack before taking the first juicy bites.

“Excellent, class,” says Monica. “Before you eat the apple, ask yourself whether or not you're hungry. Remember, you don't have to eat if your body isn't giving you a hunger signal.”

These students are learning a practice called “Mindful Eating”, which builds the children's awareness (意识) of important physical signals like hunger and fullness.

The positive feedback from the children shows how much these newly learned life skills are helping them.

“Mindful eating helps me think about the food that goes into my body,” says Jamie, a student in Monica's class. “I can make better and healthier food choices.”

Unfortunately, these kinds of courses are in short supply because many educators believe that social and emotional programs are too expensive or time-consuming (耗时的). To save costs and reduce staffing problems, prevention programs like The Body Positive are brought into the schools. The program teaches a series of self-exploration exercises that help educators examine their feelings and attitudes about food so that they can pass on these messages to their students, too.

Kathy Laughlin, director of counseling at San Domenico High School, is a fan of the training. “Since we began the program, I have not seen as many girls with problems related to body hatred,” she says. “Mindful eating practice is one of the best ways to help students develop a healthy mind and body connection — one which will help them for years to come.”

【推荐3】A Russian spacecraft traveling to the International Space Station Thursday had to make an emergency landing when a rocket engine failed to fire. It was the latest in a recent series of failures for the Russian space program, which is also used by the U.S. to carry its astronauts to the station.

United States astronaut Nick Hague and Russian astronaut Alexei Ovchinin landed safely about 20 kilometers from Dzhezkazgan in Kazakhstan. The city is about 450 kilometers from the Russia’s Baikonur space center, which Russia operates through an agreement with the Republic of Kazakhstan.

Both the U.S. space agency NASA and Russia’s Roscosmos reported that the two were quickly recovered from the landing area by rescue crews. A spokesman for Russian President Vladimir Putin said, “Thank God the crew is alive” after they had landed safely.

About two minutes after launching, the three-stage Soyuz booster rocket suffered an unspecified failure of its second stage. Russia’s TASS news agency said the capsule carrying the two men separated from the troubled rocket safely. This caused the capsule to drop very sharply into the Earth’s atmosphere. Parachutes（降落伞）helped slow the returning capsule. Search and rescue teams were sent to recover the crew.

Russia’s RIA news agency reported that Russia has immediately put off all manned space launches after the failure. Roscosmos head Dmitry Rogozin said he had ordered a state commission to carry out an investigation into what went wrong. He said Russia will share all relevant information with the U.S.

The TASS news agency said that the ISS crew has enough supplies and that the failed launch will not affect operations.

The U.S. and other nations have depended on Russia to carry astronauts to the ISS since the retirement of the Space Shuttle program in 2011. In coming years, American aerospace companies SpaceX, with its Dragon 2, and Boeing, with its Starliner, are expected to return to space.

【推荐3】A cheap printed sensor(传感器) could transmit wildfire warnings. Wildfires have recently destroyed the forests across the world, and their gravity is increasing. Hoping to reduce harm, researchers led by Yapei Wang, a Chinese chemist of Renmin University, say they have developed an inexpensive sensor to detect(监测) such fires earlier with less effort.

Current detection methods rely heavily on human watchfulness, which can delay an effective response. Most wildfires are reported by the general public, and other alarms come from routine foot patrols and watchtower observers. Passing planes and satellites also occasionally spot something, but "the fire first appears on the ground," Wang says. "When you see the fire from the sky, it is too late."

The team says its new sensor can be placed near tree trunks' bases and send a wireless signal to a nearby receiver if there is a quick temperature increase. That heat also powers the sensor itself, without replacing batteries. The team printed the substances onto ordinary paper to create a sensor for just $ 0.40.

But improving coordination among the different companies involved in firefighting is even more important to deal with, says Graham Kent, an earthquake expert at the University of Nevada, Reno, who was not part of the study. Kent is director of ALERT Wildfire, a network that uses cameras and crowd sourcing to watch for fires in California, Nevada and Oregon. "The whole way that you respond to a fire until it's put out is like a ballet," he says. "You'd have to choreograph(设计)it just so, with resources accurately used at the right time and place and in the right order from detection to confirmation to assignment to extinguishment(熄灭). Fire detection is just step one."

Wang says his team's next steps are to extend the device's signal range beyond the current 100 meters, which can limit practical use, and to develop a protective shield（防护罩） for it. The transmitter's effectiveness, he notes, will also need to be examined in the field ahead.