Next time you raise an eyebrow at the views of your partner, friend, sibling (兄弟姐妹) or colleague, remember they could be helping to make you smarter.

    New research shows that intelligence is not fixed but can be boosted throughout adulthood by family members, bright mates and intellectually stretching (拉伸) careers.

    The study challenges the commonly held belief that intelligence is static by the age of about 18. Current scientific consensus suggests that intelligence is controlled by genes, with environmental factors such as schooling and nutrition playing a partial role up to this age. After this point, IQ scores stabilize (稳定).

    But James Flynn, professor of political studies and psychology at the University of Otago in New Zealand, argues that people can “upgrade” their own intelligence throughout their lives. He believes intellectual stimulation (刺激) from others is crucial as the “brain seems to be rather like a muscle – the more you use it, the stronger it gets”. However, the opposite is also true – so people sharing a home or workplace with those who are intellectually challenged risk seeing their IQ levels fall as a result.

    He found the “understanding quality” of a family changes the IQs of all members, especially children. It can “lift” or hold back, depending on the “gap between their brightness and that of their siblings and parents”. A bright ten-year-old with brothers and sisters of average intelligence will suffer a five to ten point IQ disadvantage, compared to a similar child with equally bright siblings. However, children with a low IQ could gain six to eight points by having brighter siblings and special educational treatment to help pull them up.

    Professor Flynn also concluded that although genetics and early life experiences determine about 80 percent of intelligence, the remaining 20 percent is linked to lifestyle. This means that people can raise their IQ, or allow it to fall, by ten points or more. Therefore, the best way to boost IQ level is to mix with bright friends, find an intellectually challenging job and marry someone cleverer.

    If we were asked exactly what we were doing a year ago，we should probably have to say that we could not remember. But if we had kept a book and had written in it an account of what we did each day, we should be able to give an answer to the question．

    It 1s the same in history．Many things have been forgotten because we do not have any written account of them. Sometimes men did keep a record of the most important happenings in their country, but often it was destroyed by fire or in a war．Sometimes there was never any written record at all because the people of that time and place did not know how to write．For example，we know a good deal about the people who lived in China 4,000 years ago，because they could write and leave written records for those who lived after them．But we know almost nothing about the people who lived even 200 years ago in Central Africa，because they had not learned to write．

    Sometimes，of coures，even if the people cannot write，they may know something of the past．They have heard about it from older people，and often songs, dances and stories have been made about the most important happenings, and these have been sung，acted and told for many generations，for most people are proud to tell what their fathers did in the past．This we may call”remembered history”．Some of it had been written down. It is not so exact or so valuable to us as written history is，because words are much more easily changed when used again and again in speech than when copied in writing．But where there are no written records，such spoken stories are often very helpful．

    Whether you're on a long road trip or stuck in traffic while driving home from work, a low phone battery (电池) could mean disaster for the bored driver. At first, it may seem harmless to plug your phone into your car's USB port. But unless you're desperate, charging your phone in your car might be a big mistake.

    Why? First, the USB port in your vehicle probably provides less electricity than your phone really needs to charge. As a result, your phone might stop working while it charges, or worse—hardly charge at all.

    Brad Nichols, a technician at Staymobile, told Reader's Digest. “This is mostly due to the fact the phone is using more power than the car charger is supplying it.”

    Nichols also says that your phone could receive too much power, especially if you're using a “Cigarette Lighter” port to charge up. Most Cigarette Lighters can supply up to 10 amps (安培), while most chargers use one to three amps. A damaged charger can provide inconsistent power to the phone, leading to sudden power increase that could cause damage to the inside parts, or on the rare occasion, destroy it.

    Charging your phone while on the road could use up your car's battery, too. If your engine is off, but you still use the radio—the phone will draw power from your car's battery as it charges. This usually isn't a big deal for those who own new cars with healthy batteries Nichols says. But if your car is an older model, you might want to avoid charging your phone through its USB port.

    Most importantly, it, s not safe to use your phone while operating a vehicle. “Anytime a person's hands leave the wheel or eyes leave the road, it becomes very dangerous for them and the other people around them,” Nichols says. Bottom line: Play it safe, and wait until you get home to plug in.

There's no doubt that Dolly Parton knows how to light up a stage; however, she's also spent a number of decades trying to bring a spark to children's education.

Through programs such as the Buddy Program and the Imagination Library, the American singer is sharing her passion for giving kids a better chance in life across the states and further in the UK, Australia, Canada and Ireland.

Among other charity efforts, Parton was inspired to introduce the Buddy Program after seeing the alarming dropout rate in her hometown of Sevierville, Tennessee, in 1990. That year 34% of schoolkids dropped out of high school—a decision they reached around fifth or sixth grade. The figures were so shocking that Parton decided to inspire kids with her new program. So, in the same year, she invited the fifth and sixth graders to her amusement park, Dollywood. She gathered the pupils and asked them to pair up with a friend as part of a motivating buddy system. If both children went on to graduate, she said she would offer them both a $500 check as a reward. That year the percentage of kids abandoning their education dropped to an unbelievable 6%, and continues to be around that rate today.

It was after the success of the Buddy Program that Parton wanted to address the issue of early education even further. To help give kids from disadvantaged backgrounds a better chance at school, the singer started her Imagination Library in 1995. Over the following 25 years the program has seen babies and toddlers enjoy new books every month thanks to her generosity.

And the singer shows no sign of stopping. In 2020, she donated $1 million to Vanderbilt University to try and help research in the fight against COVID-19.