Are you content with the shape of your nose? If not, the climate may be to blame, not your parents.

This is according to a recent study carried out by scientists from Pennsylvania State University, US. They found that climate played a key role in shaping our noses. The findings were based on an examination of the size and shape of noses of 476 people from four regions—West Africa, East Asia, South Asia and Northern Europe, using 3-D facial imaging technology.

     “People have thought for a long time the difference in nose shape among humans across the world may have arisen as a result of natural selection because of climate,” Arslan Zaidi, one of the lead authors of the study, told The Guardian. But while previous studies were based on measurements from human skulls, Zaidi and his team looked at nose shape itself.

    The result showed that wider noses are more common in warm and humid climates, while narrower noses are more common in cold and dry climates. That, Zaidi said, could be because narrower nasal passages help to increase the moisture (潮湿) content of air and warm it，which is easier on our lungs. This, in turn, led to a gradual decrease in nose width in populations living far away from the equator.

    More study is still needed to test the link between climate and nose shape, but Zaidi believes the current findings are valuable in understanding potential health issue. “As we become more of a global community, we are going to come across climates that we are not adapt to,” he told the Guardian. This means moving to a very different climate might increase the risk of breathing problems.

    However, he added, “This may not be necessarily true for various reasons such as of modern medicine and the fact that our current climate is very different from what it used to be.”

    A black hole is created when a large star burns out. Like our sun, stars are unbelievably hot furnaces(熔炉) that burn their own matter as fuel. When most of the fuel is used up, the star begins to die.

    The death of a star is not a quiet event. First there is a huge explosion. As its outer layer is blasted off into space, the dying star shines as brightly as a billion suns.

    After the explosion, gravity pulls in what's left of the star. As the outside of the star sinks toward the center, the star gets smaller and smaller. The material the star is made of becomes tightly packed together. A star is so solid that a teaspoon of matter from it weighs billion of pounds.

    The more the star shrinks(收缩), the stronger the gravity inside it becomes. Soon the star is very tiny, and the gravity pulling it in is unbelievably strong. In fact, the gravity is so strong that it even pulls light into the star! Since all the light is pulled in, none can go out. The star becomes black when there is no light. Then a black hole is born!

    That's what we know about black holes. What we don't know is this: What happens inside a black hole after the star has been squeezed into a tiny ball? Does it keep getting smaller and smaller forever? Such a possibility is hard to imagine.

    But if the black hole doesn't keep shrinking, what happens to it? Some scientists think black holes are like doorways to another world. They say that as the star disappears from our universe, it goes into another universe. In other words a black hole in our universe could turn into a "white hole" in a different universe. As the black hole swallows(吞噬) light, the white hole shines brightly--somewhere else. But where? A different place, perhaps, or a different time--many years in the past or future.

    Could you travel through a black hole? Right now, no. Nothing we know of could go into a black hole without being crushed(挤压). So far the time being, black hole must remain a mystery.

    Black holes are a mystery--but that hasn't stopped scientists from dreaming about them. One scientist suggested that in the future we might make use of the power of black holes. They would supply all of Earth's energy needs, with plenty to spare. Another scientist wondered if a black hole could some day be used to swallow earthly waste--a sort of huge waste disposal(处理) in the sky!

    Can you imagine walking into a gym and seeing dogs lifting weights or cats jogging? We're being a bit silly thinking of dogs and cats going to the gym, but we do have a reason. Just like human beings, pets that don't get enough exercise can become overweight.   
   Overweight pets can develop serious health problems just like we can. So, if you have a pet, part of being a good owner is making sure that your pet gets the right amount and kind of exercise.

    Before you start your pet on an exercise program, be sure to schedule a check-up for your pet and ask your veterinarian how much and what type of exercise your pet needs.

    Just like humans, pets need to be started out slowly. Over time, they will get fit and be able to exercise for longer periods of time. If you exercise alongside your pet, you'll benefit, too!

    Starting out, you might want to play with your pet for 15－20 minutes at a time. Gradually, you can turn those plays into several 30－minute walks or jogs each week. If your pet is especially active, you can extend them to an hour or longer.

    Of course, some pets, such as cats, may not be easy to take for a walk or a run. These pets still need exercise, though. Don't underestimate the value of energetic indoor play, such as games of chase, for these types of pets.

    As you start exercising with your pet, here are some things to keep in mind:

    Make sure your pet has plenty of water before, during, and after exercising.

    If you have older pets, don't push them as hard.

    Watch the heat! If you are outside, exercising with your pet will be best early in the morning or later in the day.

    As any plane passenger will confirm, a crying baby is almost impossible to ignore, no matter how hard you try. Now scientists believe they may have worked out why. A baby's cry pulls at the heartstrings(扣人心弦) in a way while other cries don't, researchers found.

    Researchers found that a baby's cry can trigger unique emotional responses in the brain, making it impossible for us to ignore them—whether we are parents or not. Other types of cries, including calls of animals in great pain, fail to get the same response—suggesting the brain is programmed to respond specifically to a baby' cry.

    A team of Oxford University scientists scanned the brains of 28 men and women as they listened to a variety of calls and cries. After 100 milliseconds—roughly the time to blink(眨眼)—two parts of the brain that respond to emotion lit up. Their response to a baby's cry was particularly strong. The response was seen in both men and women—even if they had no children.

    Researcher Dr Christine Parsons said, “You might read that men should just notice a baby and step over it and not see it, but it's not true. There is a special processing in men and women, which makes sense from an evolutionary view that both men and women would be responding to these cries.” The study was in people who were not parents, yet they are all responding at 100ms to these particular cries, so this might be a fundamental response present in all of us regardless of parental status.

    Fellow researcher Katie Young said it may take a bit longer for someone to recognize their own child's cries because they need to do more “fine-grained analysis”. The team had previously found that our reactions speed up when we hear a baby crying. Adults performed better on computer games when they heard the sound of a baby crying than after they heard recordings of adults crying.

    When Richard had tried to jump off the cable car, his backpack had been caught in the chair, which then dragged him back down the hill. In the process, the backpack belt twisted around his neck, making him breathless. Now Richard's body was swinging four feet above the snow. The cable car operator had quickly stopped it, and the friends kicked off their skis and ran toward the scene. They made a human pyramid to try to reach Richard, but the unconscious man was too far off the ground. With the clock ticking, Wilson ran to the ladder of a nearby lift tower. Scared skiers watched as he struggled the 25 feet. After he reached the top, Wilson's first challenge was to climb onto the two­inch steel cable that held the chairs. He handled the balance and height bravely, but he knew he could not walk on the cable. Therefore, he calmed down and sat over it and then used his hands to pull himself to Richard quickly. Wilson's greatest fear wasn't that he'd fall, but that he wouldn't reach Richard. "This was life or death," he said.

    When he reached Richards chair, Wilson swung a leg over the cable and attempted to drop down onto it. But as he did that, his jacket caught on the movable footrest, which was in the up position. The footrest began to slide down, with Wilson attached. But before that could happen, he managed to free himself and reached Richard.

    Fortunately, the ski patrol (if) had gathered below and performed emergency treatment on Richard, who had been hanging for about five minutes, then skied him down to an ambulance.

    That night, Richard called from the hospital to express his thanks to Wilson, his other friends and the workers at the Arapahoe Basin Ski Area.

    The National Beekeeping Centre Wales is a free attraction in the countryside that teaches children about the importance of honeybees – with the chance to try lots of local honeys.

    This friendly visitor centre is a supporter of Welsh honeybees, which are increasingly under threat from climate change and loss of wildflower meadows. It raises visitors' awareness of environmental issues and shows the 4,000-year history of beekeeping and honey-making from the ancient Egyptians to the Romans. A Hive Aid scheme lets you adopt a beehive (from £50 per person), and regular courses (from £60 per person) train new generations of beekeepers.

Fun fact

    Bees pollinate about a third of everything we eat and play an important role in sustaining our ecosystems. In economic terms, honeybee pollination could be worth up to £200m to the UK alone.

What about lunch?

    Next door is the Furnace Tearoom, part of the Bodnant Welsh Food Centre, which serves light bites – wraps (卷饼), fruit salads (£7) and coffee. And the nearby Pavilion Restaurant at the National Trust's Bodnant Garden has cooked food, including baked potatoes (£5) and daily specials such as local casseroles (焙盘) with bread rolls (£6), plus coffee and cakes.

Exit through the gift shop

    There is a range of bee-themed gifts in our gift shop, including bee toys (£2), wooden honey candy (£2) and a selection of honeys all made by Welsh producers (£5). The bestselling Bodnant honey (£8) goes fast.

Getting here

    We are located just off the A470 on the Bodnant Estate in the Conwy Valley, and 10 minutes from the A55 north Wales coast road. Follow the brown signs just after Bodnant Gardens.

Value for money

    Visits and activities for kids are free, though donations are welcome. Taster days (from £60) and the weekend beekeeping course (£80 per person) are held at Abergwyngregyn village, 10 miles west down the A55.

Opening hours

The Visitor Centre opens daily from 10 am — 4pm but it is volunteer-run, so phone ahead to check. Expect lots of fun activities around the annual Conwy Honey Fair.