2 . Independent living at home is the ideal for every aging person. But a fall or other health-threatening incidents can change everything rapidly.

The wearable “panic buttons” introduced in the late 1980s were a great advance. But they only work if people actually wear them and can reach the button in an emergency. Today there are passive wearables that automatically detect falls, and camera-based systems to monitor elder safety.

Coming from a 40-year career in the semiconductor and wireless communication field, Rafi Zack decided to find a better alternative. “People aren’t devoted to wearing small devices 24/7, and camera-based systems are an invasion（侵犯）of privacy,” he points out, “The most challenging aspect is a fall. How fast we can detect a fall matters because the medical situation worsens quickly. Sometimes people stay on the floor for a long time. We have to find out how to solve that problem.”

Zack is a co-founder, CEO and vice president of R&D at EchoCare Technologies which has developed ECHO (Elderly Care Home Observer), a cloud-connected monitor based on radar technology and machine learning.

Because radar sees through walls, one ECHO unit fixed on the ceiling or wall can monitor one person (or two persons, in a future version) in a standard-sized apartment in a senior living facility. The device detects falls, breathing difficulties, drowning in a bathtub and other dangerous events. It gives out warnings to potential health worsening conditions by continuously monitoring and analyzing the person’s location, posture（姿势）, motion and breath. EchoCare tested the device in the United States, Japan, Australia and Israel. ECHO was certified（认证）in 2019 in Japan with the most aging population in the world.

“Bathrooms were the main testing area where about 17,000 deadly accidents happen annually.” said SMK Director and Executive Vice President Tetsuo Hara. “Bathroom makers, home security service providers and nursing homes are highly interested in EchoCare’s solution.” Zack noted, “As more and more elder people live alone as a result of social distancing, there is an increased need to monitor them without the burden of wearables or privacy-invading cameras.”

3 . A young woman was walking in Santa Ana, California, when she came upon an elderly street vendor (小贩) selling tamales (玉米粉蒸肉). Seeing how tired he looked in his wheelchair, she decided to give him a few bucks and a sandwich—and she also gave him a sympathetic ear to listen to his story.

When Kenia Barragan first saw Jose Villa Ochoa, she thought of her own parents. “I felt for him,” she told KTTV News, “My parents are both older, and I would hate to see my dad out selling tamales for somebody and barely making ends meet.”

Known as “Don Joel”, he explained that although he wanted a job, no company would hire him because of his age. In order to keep himself out of debt, he started to sell tamales cooked by a local woman. At the end of each hard day, she would give him a cut of the earnings. This allowed him to buy food, but was not enough for him to afford his medical treatment or a phone.

The 28-year-old woman was happy to listen to Don Joel’s story, but she wanted to do more. She made an appeal to her followers on Instagram for some assistance. Within a week, friends and strangers flooded her with more than $84 000 in donations.

In addition to the money raised for Don Joel’s retirement, Kenia purchased him a new wheelchair and a shiny new pair of shoes. Even though he’s 94, he says he feels like he’s 40 now, because the kindness has made him feel so alive. He describes the generosity as “life-changing”.

Kenia feels exactly the same way. She says she’s always looking for a purpose that helps people and that she’s been living in line with those values in her current job, working with people who have disabilities to get them transportation. Her goal in life is to establish a homeless shelter.

4 . The world has seen many inventions. While most people are proud of those associate with their names, there are things making inventors feel the other way.

The pop-up (弹出) advert, by Ethan Zuckerman

Pop-up ads are convenient for those who are interested, but most people get annoyed when they are on computers. They may contain computer viruses. Just as we would blame the inventor, the man humbly accepted his invention isn’t one of the best. In his essay, Zuckerman wrote about the most hateful thing, “I wrote the code to launch the window and run an ad in it.”

The emoticon, by Scott E. Fahlman

Emoticons began to occupy screens crazily in 2011 and gained great popularity, especially with young men. It had been four years since Fahlman first used a “smiley face” in a computer message. He created the emoticon as a joke marker. But things are different. “It has gone to places I don’t approve of,” he complained to The Wall Street Journal in 2013. “It shouldn’t have been created.”

The office cubicle (隔间), by Bob Propst

In 1968, Bob Propst came up with the idea office cubicles, something that “would build a futuristic and tidy office style with no real walls or doors and provide a more comfortable environment”. But the man has come to hate what he has invented, as Propst recalled to Fortune at age 80, “They’ve changed and just become cubicles”.

The K-Cup, by John Sylvan

It seems everyone has a Keurig coffee maker for K-Cups. John Sylvan invented the K-Cup, aimed at facilitating office life of white-collar workers. Now it’s common in houses and companies. However, the single-serve plastic coffee cups aren’t eco-friendly. “I feel bad sometimes that I ever did it”, Sylvan admits. But! Good news for Mr. Sylvan: Keuring now offers varieties of recyclable K-Cups.

5 . You might have heard about how honey bees are doing poorly these days. It’s different, though, from the situation many of the world’s vulnerable (脆弱的) animals find themselves in. We want them to live their lives and grow stronger, but are we willing to change our lifestyles to make it happen? The decrease in honey bees is a bit different, because if honey bees can’t live well, neither can people and, eventually people won’t eat as a result.

As happened in 2017, U.S. beekeepers lost 40 percent of their bees because of a disease. It’s really about the earnings of beekeepers and the reduced amount of bees. But it doesn’t stop there. Honey bees go around doing pollination (授粉). And do you know what need to be pollinated? That’s our crops. The United States Department of Agriculture (USDA) estimates bees pollinate about $15 billion worth of apples and peaches each year in the United States alone.

So, we 21st-century humans not only take notice, but also start trying to fix the problem. It’s infeasible that we give every bee the treatment. We can’t imagine how huge the task is and how hard we carry on it! The most promising immediate solution seems to prevent the disease. That’s where the bee vaccine (疫苗) comes.

Scientists have long thought immunizing (使免疫) bees will be unworkable, but a 2015 study discovered that bees transfer immunity to their babies through protein. Vaccinating a bee won’t help that bee, but if you vaccinate the queen of bees, she can pass her immunity on to her later generations through her eggs.

The new vaccine will treat for American foulbrood (AFB), a serious disease that quickly destroys bees. It’s in the testing phases and most likely headed for bee boxes near you. And don’t worry, it doesn’t require a tiny doctor’s chair and needle to deliver the vaccine—the queen bee can drink the medicine in a little sugar water and pass it along to her later generations.

6 . For British people, the word karaoke caused foggy and unpleasant memories at the office Christmas party. The less-talent performers faced the karaoke machine instead of listeners. They totally enjoyed themselves and didn’t care about what people thought even though it sounded like they tried singing their worst. Many people thought such singing was more like a stupid show. But recently the sing-along activity has been popular again. Karaoke nights have come out around the UK.

Iain Irving, the founder of Supercube, a karaoke gathering place in Edinburgh, said the COVID-19 made karaoke totally different this time. What people used to think of karaoke had become the real past. Irving said, “It is almost like that a suffering man had to go through, about sadness and worry in front of his friends. But karaoke is supposed to be about relaxing oneself in music.” According to Irving, Let It Go from Frozen is the most popular song in Supercube. And letting go is exactly what karaoke is all about. “When you sing, it does make you feel good,” said Irving.

It’s no surprise that karaoke finds its voice again. Singing is known to be bonding (粘合). However, how long has it been since you and your friends sat together to sing songs to your heart’s content? Social media has almost replaced most people’s real social life. Rob Pursey, the founder of Hip Hop Karaoke, said, “Social media can separate us a bit, but karaoke differs. I think people are looking for and they fall in love with those exciting feelings of getting together.”

The COVID-19 has been going on for several months in the UK. Everyone is tired of the news on the Internet, so it’s nice for people to come out to sing their favorite songs to a cheering crowd. “With boring news ruling the headlines, we are all eager to escape, and karaoke provides it. You just feel like you’re on a different planet for a couple of hours,” said Irving.

7 . Will your kids love your favorite childhood reads? Let’s get to it: Five Little Peppers and How They Grew. I’m reaching way back with this one (1881), but after all, who doesn’t love a good rags to-riches story?

Oh, those little Peppers. How well I remember Phronsie, Ben, Polly, Joel and Davie, and how hard they worked in the little brown house to help their poor mother, Mamsie. My kids are not yet at an age when they realize just how poor the Peppers are. But my kids are as drawn to this story as I was as a child. And I am not the one to turn down an opportunity to share an example of children gladly helping their mother.

I’m not reaching back quite as far with 1943’s Cherry Ames, Student Nurse by Helen Wells, but convincing my kids that once it wasn’t easy for nurses to wear caps and dresses. When I was little, I couldn’t get enough of Cherry’s adventures. How pioneering Cherry was! She had a job when there were few jobs available to women, she never got married, and she solved mysteries when men couldn’t. Cherry always knew what to do. She was smart, pretty, strong and ambitious. I love her.

I know the time will come when my son asks, “Come on, Mom, Didn’t you read any books with men in them?” and I’ll have to answer honestly, “No. But maybe one day a few.”

The day will come when we can go back to the library and see what is new on the shelves, and that will be a great day. But for now, I plan not to let any book on our shelves go to waste. It may seem that reaching for a book that’s more than a century older than my kids is just as ambitious as reading Frankenstein, but I’m really confident, this time.

8 . Avi Loeb, a scientist, believes that we are not alone in the universe. The belief fits with Loeb’s alien (外星的) spaceship theory that at least one alien spaceship might be flying over the orbit (轨道) of Jupiter, which won the international attention last year.

Astronomers in Hawaii found the first known interstellar (星际的) object in late 2017. It was a bit of light moving so fast past the sun that it could only have come from another star. Almost every astronomer on the planet was trying to figure out how the object, called “Oumuamua” got to our far-away, part of the Milky way galaxy. “One possibility is that ‘Oumuamua’ is debris (碎片) from an advanced technological equipment,” Loeb said. “Technology comes from another solar system just showed up at our door.”

“‘Oumuamua’ is not an alien spaceship,” Paul Sutter, another scientist wrote. He suggested Loeb was seeking publicity. Most scientists think “Oumuamua” is some sort of rock. They think it could be an icy wandering comet.

Loeb says that “Oumuamua’s” behavior, means it can’t be a block of rock shaped like a long photo. He thinks it's more likely an object that’s very long and thin, perhaps like a long pancake or a ship’s sail. Loeb says that if someone shows him evidence that contradicts his beliefs, he will immediately give in.

Loeb believes himself a truth-teller and risk- taker in an age of very safe, too-quiet scientists. “The worst thing that can happen to me is that I would be relieved of my management duties, and that would give me even more time to focus on science,” Loeb says. He said he wouldn’t mind giving up all the titles he had and returning to the Israeli farming village where he grew up.

9 . As a classic love movie of the twentieth century, Titanic makes one scene a long-lasting cinematic shot: Jack let go of his hand and sank in the icy seawater, leaving the chance of living to his lover Rose, who finally survived on a wooden door debris (残骸).

More than 100 years since the disastrous event and more than two decades after the earliest release of the movie Titanic, there have been many “door theories”. Audiences debate heatedly over whether or not Jack and Rose could have both fit onto the wooden debris and survived. So, was there room for Jack?

In a TV program, hosts Jamie and Adam even did an experiment using an exact replica       (复制品) of the wooden piece from the movie, and the two proved that if they had tied Rose’s life jacket to the bottom of the door to strengthen its buoyancy ( 浮 力 ), they would have managed to stay afloat.

However, their conclusion was debunked when director Cameron said that the freezing water and Jack’s high temperature would have made the life jacket solution impossible. He also said that the debate is beyond the point the movie was trying to make, which is focused on the tragic love story of Jack and Rose, not physics.

The largest debris recovered from the real Titanic is now displayed in the Maritime Museum. The museum’s website states that a replica was once built for the movie based on the museum’s Titanic collection which was known as the “door” used in the death scene. Unfortunately, the size of the debris coupled with the weight of Rose on top could work, but not if Jack’s additional weight was added to it.

In a word, science has proven that Jack didn’t die for nothing and did indeed sacrifice himself to save the love of his life.