Are we getting more stupid? According to Gerald Crabtree, a scientist at Stanford University in the US, we are.  You may not want to hear this, but Crabtree believes that human intelligence reached its peak more than 2,000 years ago and ever since then has been going downhill. “If an average Greek from 1,000 BC were transported to modern times, he or she would be one of the brightest among us,” Crabtree told The Guardian.

    At the heart of Crabtree's thinking is a simple idea. In the past, intelligence was critical for survival when our ancestors had to avoid dangerous animals and hunt for food. The difference of being smart or stupid is often life or death. However, after the spread of agriculture, when our ancestors began to live in dense ( 稠密的）farming communities, the need to keep their intelligence in peak condition gradually reduced. This is not hard to understand. Most of the time,pressure is what keeps us going – you need the pressure from your teachers to finish your homework; the pressure of looking pretty prompts(促使) you to lose weight when summer comes. And the same is also true of our intelligence – if we think less, we become less smart.

    These mutations(变) are harmful to our intelligence and they were all developed in the past 3,000 years. The other evidence that Crabtree holds is in our genes. He found that among the 2,000 to 5,000 genes that we have that determine human intelligence , there are two or more mutations in each of us. However, Crabtree's theory has been criticized by some who say that early humans may have better hunting and surviving abilities, but people today have developed a more diverse intelligence. For example, spearing a tiger doesn't necessarily require more brainpower than playing chess or writing a poem. Moreover, the power of modern education means a lot more people have the opportunity to learn nowadays. “You wouldn't get Stephen Hawking 2,000 years ago. He just wouldn't exist,” Thomas Hills of the University of Warwick, UK, told Live Science. “But now we have people of his intellectual capacity doing things and making insights(洞察力) that we would never have achieved in our environment of evolutionary adaptation.”

    Primary schools could be told to remove some traditional subject-based lessons and replace them with “personal development” classes to encourage children to improve their social and practical skill. Parents, teachers and pupils, who took part in the investigation carried out for the biggest ever official review of the primary curriculum, argued that the number of subjects taught to very young people should be reduced.

    The review, being conducted by the government's school's director Sir Jim Rose, will consider how to redesign the primary school day to handle concerns that too many pupils leave primary school unable to read, write and do maths at the level expected of them. It will also address criticisms that pupils are expected to study so many subjects there is little time for creative learning.

    The 60 focus groups brought together 1,500 parents, pupils and school staff and is expected to heavily influence the thinking of the Rose review, which the government is promising to back. Instead of a broad range of subjects, pupils should study in-depth literacy and maths lessons alongside a more creative curriculum that encourages pupils to develop personal, learning and thinking skills, they say. Such lessons might include “healthy lifestyles, sex and relationships education, drugs and alcohol education”.

    “Child and personal development as priorities have been shamefully neglected in recent years in the rush to hit targets in the basics.” John Bangs, head of education at the National Union of Teachers, said, “The worst thing would be to evaluate child development through the current high stakes testing system. That would weaken the capacity of teachers to meet children's unique needs.”

    However, the shadow schools minister, Nick Gibb, said, “If lessons on lifestyle are given the same status as traditional subjects, it is the most disadvantaged children who will be worst affected.” “Children are not able to personally develop and succeed in the future if they don't have a grasp of basic subjects such as maths and English early on in primary school. Removing high requirement from the primary curriculum would increase the inequality gap between less well-off pupils and the rest.” Nick added. A spokeswoman for the Department for Children, Schools and Families (DCSF) said, “This is a summary of stake holder's view, not the views of the Qualifications and Curriculum Authority or the DCSF, and has been submitted to Sir Jim Rose's review as evidence to consider.”

With fuel costs rising and airlines finding more fees to impose （强加，征税）on travelers every day, airfare isn't getting any cheaper. Since you can't drive to all your dream destinations, flying is the only way to go sometimes and, undeniably, the fastest. Luckily, there are plenty of ways to find the most affordable fares and also avoid paying as many extra charges as possible when you plan ahead.

    Get the best fare. Airlines put out their fare sales on Tuesday morning, making this day the best day to book a flight for less.

Fly during the least popular times. Tuesday, Wednesday and Saturday are the slowest days to fly, which means cheaper deals than the rest of the week. You can also find reduced rates on early morning flights, since many people don't like to get up before the sun to get to the airport. Earlier boarding times can also considerably cut down your chances of getting bumped on an overbooked flight or delayed because of other delayed flights or mechanical issues.

    Choose your seat later. Some airlines charge you to pick your seat when you book online, adding even more to the bottom line of your ticket cost. If you show up early on your travel day, you can still get suitable seats. Some of the best seats get held back until flight day, unless others are willing to pay extra for them ahead of time, so you still have the chance at one of those.

Fly on holidays. You already know that summer is the most expensive time to fly, and even though most other times are more affordable, the days surrounding holidays can be crazy. Save big if you're willing to travel on major holidays, such as Thanksgiving and Christmas.

Don't wait until the last-minute to book. Many travelers don't know that there's a sweet spot for booking and getting the best price on your tickets. Book too early or too late and you could end up paying more than you need to. The best time to book is between three months and six weeks from when you want to travel.

    Your kids might be ready for a break from school but the idea of being at home for three weeks loses its magic. Lucky for us Portlanders, the city has no shortage of awesome winter camps for kids.

    Trackers Earth

    For winter break, Trackers is offering several one-day outdoor and craft camps. The hard part will be choosing between so many fun options: “Ninjas Save Christmas?” Or “Here We Go A Waffling - Caroling and Waffles?”

    Details: $70. Dec. 23, 27, 30, 31; Jan. 2, 3. （Ages 4-14）

    Address: 5040 SE Milwaukie Ave.

    Tel: 503-345-3312

    Audubon Society

    Your kids don't have to be specifically bird-crazy to appreciate the Audubon Society's one-day winter camps. The classes all have a broad nature focus, including everything from ducks for the younger set to introducing older kids to bats, wolves and wildlife rescue work.

    Details: $65, Dec, 2S, 24, 26-31; Jan, J-3 (Ages 6-14)

    Address: 5151 NW Cornell Rd.

    Tel: 971-222-6120

    Oregon Museum of Science and Industry (OMSI)

When your kids start to get bored with his or her own Legos (乐高玩具)－yes, it occasionally does happen－check out OMSI's one-day Lego and Museum Experience, a full day of hands-on Lego activities in one of the city's most fun, family-friendly museums.

    Details: $49. Classes offered throughout December and January, (Ages 7-10)

    Address: 1945 SE Water Ave.

    Tel: 800-955-6674

    The Children's Gym

    Your kids definitely won't complain of being bored at Children's Gym's Winter Sports Camps. From 9:0 -5:30, they'll develop their gymnastics skills on the center's excellent equipment, then squeeze in a little rock climbing and field games.

    Details: $60/day; Dec. 23, 26, and 2 7; Jan. 2 and 3. (Ages 3-14)

    Address: 1625 NE Sandy Blvd.

    Tel: 503-249-5867

    Chris Thomas used to think of Facebook as just a platform to get in touch with his friends. He now believes the social networking service with saving his life. The 28－year－old was diagnosed with muscular dystrophy(肌肉萎缩症) nine years ago and has relied on a wheelchair ever since.

    On July 15，2015，Thomas was getting ready for bed in his apartment，when a shelving(架子) fell onto his wheelchair and knocked him over，causing him to fall and hit the back of his head. After waking up from a few minutes of coma(昏迷)，he realized he couldn't reach the string used to get the doorkeeper's attention.

    His phone was nearby and had the Facebook application conveniently open，so he posted a status update that immediately got his friends worried—even some he hadn't spoken to in years. “It was amazing，friends from six different states who didn't know each other were connecting with each other to get me help，” Thomas said. “Now that's the power of social media! You have hundreds of people at your fingertips.”

    Eight minutes after the status went up，an old friend，Leah，got in contact with Thomas' friend Brad，whose wife was in the neighborhood，and before you knew it there were 12 Facebook friends in his apartment，who took him to the hospital at once. They showed up to the rescue at the perfect time. Minutes before they arrived，Thomas thought he was going to have a panic attack，which he often suffers from because of his illness，but he's doing better now.

    “It felt good to know that my friends，even those I haven't spoken to in the past，came to save me，” Thomas said. “They all came together .I would've never imagined it.”

    Most people agree that being a good driver means being safe and not aggressive on the road. One debate some people still argue, however, is who drives better: men or women? Although it's impossible to say that one gender drives better than another definitively, there are some noteworthy trends.

    Male drivers tend to have more accidents

    Data from the Insurance Institute for Highway Safety (IIHS) shows that male drivers tend to have more total accidents than females. The IIHS, an independent non­profit devoted to reducing car accidents, also found that 71 percent of all motor vehicle crash deaths in 2017 were males. Although the gap has narrowed, almost every year from 1975 to 2017, the number of male crash deaths was more than twice the number of female crash deaths, per the IIHS.

    Women might be less­confident behind the wheel

    Although male drivers have more accidents, other research shows women aren't "perfect" drivers, either. Researchers from the University of Michigan's Transportation Research Institute studied traffic accidents over 20 years and found that female drivers are more likely to run into a car driven by another woman than a man. The study, however, doesn't explain possible reasons for this pattern.

    One that they might consider testing in the future is that some research also shows women are less­confident behind the wheel than men. A study from UCLA exploring the relationship between new drivers' skills and different variables, including gender(性别), shows female students were less confident drivers than men.

    So are men better drivers than women?

    Gender is just one factor when it comes to safe driving, along with others such as age, and even the time of day people drive. One study shows that both genders have a greater accident risk when driving at night, but males still have a higher risk at all times of the day. Driving quality also changes based on location, too, as some states are more dangerous than others. Data from the National Highway Traffic Safety Administration shows that Wyoming, Mississippi, and Montana have high accident death rates, without regards to gender. It goes to show that everyone should learn and practice safe driving habits instead of worrying about who drives better.