1 . Scientists say they have developed a system that uses machine learning to predict when and where lightning will strike. Researchers report the system is able to predict lightning strikes up to 30 minutes before they happen within a 30-kilometer area. Lightning is a strong burst of electricity in the atmosphere. Since it carries an extremely powerful electrical charge, it can cause very deadly results. European researchers have estimated that between 6,000 and 24,000 people are killed by lightning worldwide each year. For this reason, climate scientists have long sought to develop methods to predict lightning.

The system tested in the experiments uses a combination of data from weather stations and machine learning methods. The researchers developed a prediction model that was trained to recognize weather conditions that were likely to cause lightning.

The model was created with data collected over a 12-year period from 12 Swiss weather stations in cities and mountain areas. The data, related to four main surface conditions: air pressure, air temperature, relative humidity (湿度) and wind speed, was placed into a unique machine learning algorithm (算法), which compared it to records of lightning strikes. Researchers say the algorithm was then able to learn the conditions under which lightning happens.

The researchers test-ran the system several times. They found that the system made predictions that proved correct almost 80 percent of the time. “It can now be used anywhere,” the Swiss Federal Institute of Technology said in a statement.

The researchers plan to keep developing the technology in partnership with a European effort that aims to create a lightning protection program. The effort is called the European Laser Lightning Rod project. Scientists working on the project are experimenting with a laser technology that could someday control lightning activity, transferring lightning charges from clouds to the ground. They hope that such technology can one day be used as protection against lightning strikes. Possible uses could be at stations, airports or places where large crowds gather.

3 . The Pomodoro technique is probably one of the most powerful techniques in all of learning. All you have to do is set a timer for 25 minutes, and then just focus as attentively as you can for those 25 minutes.

Now if you start focusing on and you’re working on, and then you look up at the timer and two minutes have passed. You may feel like you can’t hold on. And just let the thought go by, and return your focus to whatever you are working on. And when that 25 minutes is up you relax a little bit. You might wonder why that 25 minutes is the magic number, and the reality is we don’t really know. There’s not a lot of research on the Pomodoro technique, which is surprising because it’s so incredibly popular and people find it very useful.

But there’s an interesting tidbit (小趣闻) related to the Pomodoro technique, and that is that: when you just think about something that you don’t like very much, it stimulates a part of the brain that experiences pain. And so the brain naturally enough shifts its attention to something else, like Facebook or Twitter or something like that.

And what the Pomodoro technique does, when you do it you’re setting that timer. You don’t want to sit there and think, “I’m going to work on this problem and get it all finished. You just want to think, I’ve got 25 minutes where I just have to work on something. ” Don’t even think about what that thing is. What that does is it slips in under your brain’s radar. It doesn’t stimulate so much that pain in your brain; and then that pain in the brain, research has shown, lasts for 20 minutes.

So if you work for 25 minutes you will suddenly find yourself getting into the flow because you’ve gone past that painful period. So the Pomodoro technique is effective in many different aspects.

5 . A happy beagle (小猎犬) called Bella loves Amazon boxes. It tears into them while ignoring other delivery boxes. Little Bit, a tortoiseshell cat, is similarly consumed — but by socks. It raids (偷袭) the laundry basket in the middle of the night and also paws through the open suitcases of house guests, who almost always find themselves missing a sock in the morning. Pets do some pretty weird things. But these strange behaviors often make perfect sense to the pets, said scientists who study animal behaviors. “These behaviors are not invented on the spot,” said Carlo Siracusa, a professor at the University of Pennsylvania School of Veterinary Medicine. The pets are doing behaviors that their wild ancestors did, but they’ve changed them a bit to fit their new lives as pets.

Dogs can be trained to roll over and play dead. But their ancient instincts from their wolf ancestors are still there. Instincts, or instinctive behaviors, are behaviors that are done without thinking. They don’t have to be learned. For example, some dogs will scratch the ground after pooping(排便). But they’re not trying to bury their poop. They want other animals to notice it. “They are depositing smell in those areas,” Siracusa said. “It’s almost like drawing a picture with a big red marker around it,” he added.

Cats, on the other hand, almost always bury their waste. “They are covering their tracks,” says Monique Udell, an expert on human-animal interactions who works at Oregon State University. Cats are predators, meaning they hunt other animals for food. But other animals hunt them, too. So they don’t want to be seen-or smelled. Mikel Delgado, the founder of a California-based cat behavior consulting service, said that many other cat behaviors, arise from cats’ wild origins.

While dogs share many behaviors inherited (继承) from wolves, they’ve also developed a few of their own. “Puppy dog eyes”, the innocent look that many humans are helpless to resist, is one. Over the time period that they’ve lived with people, dogs have developed certain muscles around their eyes. This helps them make the adorable expressions that win over humans. Like wolves, dogs also like to lick faces. Humans think their pets are kissing them, but they are not. “It’s how wolf puppies get food from their parents’ mouths,” Siracusa said. “It also can be a sign of submission. When a lower-ranking individual approaches a higher-ranking one, it gets down real low and licks the dominant one to say: ‘I’m not a threat to you.’”

7 . Two weeks ago, a 5-year-old girl named Sunshine Oelfke emptied out her piggy bank (存钱罐) onto the living room floor and immediately started counting. Her grandmother, Jackie Oelfke, thought she was playing as she carefully lined up the coins, but then she saw the girl put the coins into a plastic bag and place it in her backpack.

“What are you doing with that money?” Jackie asked her granddaughter.

“I’m taking it to school,” Sunshine replied. “I’m going to take it for milk money. My friend Layla doesn’t get milk— her mom doesn’t have milk money and I do.”

Jackie’s heart melted at Sunshine’s words. Choked with strong feelings, Jackie held her sweet granddaughter tightly in her arms.

Last week, Jackie and Sunshine met with her teacher, Rita Hausher, and handed her the $30 the kindergartner had saved. There are 20 kids in Sunshine’s class and about half don’t get milk. It costs $ 0.45 a carton (纸盒). The total adds up to about $180 a month for every child in the class to have milk every day.

After dropping Sunshine off at school, Jackie posted a tearful video on Facebook to explain her granddaughter’s plan. To her surprise, many people offered to donate toward the cause. Within a week, Jackie raised more than $1,000. Now every student in Sunshine’s class can get free milk for the rest of the year.

Jackie said Sunshine doesn’t see her kind act as a big deal. She was just trying to look out for her friends. “She doesn’t understand the effect she’s brought about,” Jackie said. “But now she knows she can do whatever she puts her mind to.”