Could a cave be the place of buried treasure in a small village in Marajgushu, near Navasha, Kenya? A rumor of treasure has some villagers dreaming of wealth, while ohters see it as a cheat. It's said that in the 1800s a white man left treasure inside the caves.

    This system of caves has become the center of excitement in the village. It is unclear where the rumor came from, but some local people believe white settlers hid gold and other precious metals in the cave before leavign the area, many years ago.

    Local villager Edward Maina says the rumors have brought a lot of treasure hunters flooding into town to dig in the caves. Villages say original treasure seekers entered the cave nearly two months ago before being arrested by police. Local governmetns closed up the entrance, but they broke back in.

    While neither gold nor silver has been found yet, the cave does guard another important resource: water. Many depend on a natural spring coming from the cave and local officials, among them Ward Councilor Gaka Mwaniki, worry the digging could affect or dirty the supply.

    “There's nothing. We've seen ourselves there's nothing in those caves. The cave is natural. It's the water table that they're affecting” says Mwaniki.

    Local resident James Mbugua Njenga wants the situation brought under control. “If at all there's treasure inside there, let the government come and dig and protect the water table,”says Njenga.

    It might be true. It might be a cheat. Whatever the case, treasure hunters continue to be attracted to the mystery of the caves.

    For many of us, talking about money is embarrassing, especially revealing our income and spending habits in public. So it's no wonder that seeking investment advice from computer program is so popular.

    Consultancy firm Accenture found that 68% of global consumers would be happy to use robot-advice to plan for retirement, feeling it would be faster, cheaper, and fairer than human advice. “Many of our customers say they feel awkward in face-to-face meetings, preferring an online experience where they don't feel nervous,” says Lynn Smith, a director of robot-advice firm Wealth Wizards. So how does robot-advice work and is it really any better than traditional financial advice?

    Robot-adviser firms use algorithms (算法) to analyse your financial situation and goals and then work out an investment plan to suit you. Basically, you answer lots of questions online about your income, expenses, family situation, attitude to risk and so on, and then the algorithm allocates (分配) your savings to a series of investments, from index funds that aim to imitate a particular stock market index or sector, to fixed-income bonds.

    Robot-advice is certainly growing in popularity. But are we really happy to give up the human adviser completely? “No” is the short answer. Accenture finds that a significant proportion of us still want human interaction, particularly when our finances are complex. “When a customer needs advice surpassing a number of different regulatory regimes, human advice will be required, says John Perks, managing director of life and pensions at UK insurer LV, which launched its Retirement Wizard robot-advice service two years ago.

    The truth is that only about a quarter of funds managed by clever humans overcome the market as a whole, so when you take into account the much higher management fees you pay for that kind of service, the performance difference is likely to be marginal (微不足道的) for most of us.

    The robots may be coming, but in this case at least, they seem to be on the side of the small investor trying to save for a comfortable retirement.

    Science Advances published a new research report, saying bees are capable of addition and subtraction (减法)in Arithmetic(算术) learning—using colors in the place of plus and minus symbols.

    It isn't unusual to see the ability to count—or at least distinguish between differing quantities in the animal kingdom—Such ability has been seen in frogs, spiders, and even fish. But solving equations (方程式) using symbols is rare, so far only achieved by famously brainy animals such as chimpanzees. The previous research says the social insects, ants, can count to four and understand the concept of zero and researchers wanted to test the limits of what their tiny brains can do.

    The experiment goes like this. Scientists trained 14 bees to link the colors blue and yellow to addition and subtraction, respectively. They put the bees at the entrance of a Y-shaped maze (迷宫), where they were shown several shapes in either yellow or blue. If the shapes were blue, bees got a reward if they went to the end of the maze with one more blue shape (the other end had one less blue shape); if the shapes were yellow, they got a reward if they went to the end of the maze with one less yellow shape.

    The testing worked the same way: Bees that "subtracted" one shape when they saw yellow, or "added" one shape when they saw blue were considered to have aced the test. The bees got the right answer 63% to 72% of the time, depending on the type of equation and the direction of the right answer—much better than random guesses would allow.

    While the results came from just 14 bees, researchers say the advance is exciting. If a brain about 20,000 times smaller than ours can perform maths using symbols, it could pave the way to novel methods in artificial intelligence (AI) and machine learning. Just don't ask the bees to do your homework anytime soon.

Norwegians would perhaps highlight their custom of "gå på tur"— going on a journey on foot or on skis. In Denmark, everyone knows what "hygge" is — to freely enjoy the good life with the people you love. They're the issues of "intangible cultural heritage", things that cannot be physically touched such as traditions, stories, music, dance and craft skills.

In 2003, UNESCO, the education, science and culture organization of the United Nations, adopted an agreement to "preserve the intangible" and many developing-world countries were quick to get their traditions included on the official list. But it would take almost 10 years for "Agreement for the Safeguarding of the Intangible Cultural Heritage" to be approved by the Scandinavian countries.

Annika Sjöberg is responsible for managing the work of the agency in Sweden. She has been, and continues to be, flooded with suggestions of intangible cultural heritage worthy of protection, submitted by committed citizens and organizations wanting to see their particular traditions included on the list that should be ready sometime in the next couple of years.

Suggestions have also been received concerning various maritime traditions: old shipwright skills such as the building of wooden hulled vessels, are in decline and at risk of being lost forever.

"Our work has attracted considerable attention as it is regarded as being a little out in left field," says Sjöberg. "In addition, it's also opened people's eyes to the fact that the things we can't physically touch indeed have a major bearing on the way in which we live. Even in an urbanized society, there is knowledge we carry with us that we've inherited from previous generations-knowledge that's important to preserve and take care of."

Sjöberg explains that the point is not to preserve this cultural heritage in a stony rigid form, as traditions must be allowed to change and evolve. She also emphasizes that her work should not be interpreted as a nationalistic project, rather as a means of multicultural spreading.

It's actually a matter of documenting the knowledge that exists in the various traditions. What is most exciting is the diversity that now exists and the ways in which different cultures interact with each other.

There is increasing evidence suggesting that ultra-processed food addiction is indeed a significant issue. These foods, which are carefully manufactured in industrial factories rather than in the familiar setting of grandma's kitchen, are filled with altered ingredients that are artfully combined to enhance fat, sugar, and salt levels. Moreover, they contain a lots of flavor and sensory enhancers, which render them irresistibly appealing. Examples of ultra-processed foods range from packaged snacks to fast food and mass-produced desserts. In fact, they account for nearly 60 percent of the calories consumed in the United States.

Studies have revealed that up to 20 percent of adults and 15 percent of kids and adolescents might exhibit signs of addiction to these foods, a phenomenon that has been recognized for decades as rat studies in the 1980s demonstrated that the brain's reward system is powerfully activated when rats consume certain foods, a reaction similar to that when they self-administer cocaine.

In recent years, as the obesity rate in America has soared to 42 percent, especially among Black and Hispanic populations, scientists have been devoting increased attention to the impact of ultra-processed food addiction. These foods not only activate the brain's reward system but also may involve the gut-microbiology. Symptoms of craving and withdrawal are clearly evident with ultra-processed foods. People will go to great lengths to obtain these foods, and when they are refused, they may experience a series of discomforts such as headaches, fatigue, and irritability(易怒的). A study in 2022 found that ultra-processed foods meet the same addiction criteria as tobacco products.

High consumption of ultra-processed foods is linked to numerous health problems, including heart disease, type 2 diabetes, obesity, depression, anxiety, and an increased risk of death. Thin people can also be addicted, perhaps burning off the extra calories through exercise or having a genetic predisposition(易患病体质) not to gain weight easily. Food companies argue against denying these foods, but experts advocate for clear nutritional labels and restrictions on marketing to children. Treating food addictions remains an open question, but there is hope that people will become more aware of the dangers, just as they did with smoking.