According to a team of researchers, an animal's ability to perceive(感知) time is linked to their pace of life.

    “Our results lend support to the importance of time perception in animals where the ability to perceive time in a very short time may be the difference between life and death for fast moving creatures.” commented lead author Kevin Healy from Trinity College Dublin.

    The study was done with a variety of animals using phenomenon based on the maximum speed of flashes of light an individual can see before the light source is seen as constant. Dogs, for example, have eyes with a refresh rate higher than humans.

    One example of this phenomenon at work, the authors say, is the housefly and its ability to avoid being hit. The research showed flies “observe motion in a shorter time than our own eyes can achieve,” which allows them to avoid being hit.

    Professor Graeme Ruxton of the University of St Andrews in Scotland, who worked jointly on the research project, said in a statement, “Having eyes that send updates to the brain at much higher frequencies than our eyes do is of no Value if the brain cannot process that information equally quickly. Thus, this work highlights the impressive abilities of even the smallest animal brains. Flies might now be deep thinkers, but they can make good decisions very quickly.”

    In comparison, the tiger beetle (虎甲虫) runs faster than its eyes can keep up, basically becoming blind, which requires it to stop periodically to re-evaluate its prey's(猎物) position.

    Our results suggest that time perception offers an as yet unstudied dimension along which animals can specialize and there is considerable range to study this system in more detail.

    Artificial intelligence keeps defeating human, it is making countless victories against human in different fields of life and trying to push human to the corner.

    Google's DeepMind has defeated the world's number one player Ke Jie. Human brain somehow has been replaced by a machine and scientists are working very hard on developing a human brain by implanting a chip and connecting it to the thick neuron that connects the two hemispheres of the brain. Well, who doesn't want to get his brain upgraded to be as smart as the brain of Albert Einstein or Charles Darwin?

    Humans will probably one day invent a brain that can be implanted in the human skull and reprogram all the human thoughts, but this invention doesn't seems to be happening in the foreseeable future since human brain took millions of years to evolve. Some scientists believe that human will defeat death in the next twenty hundred years but they can't really predict how long it's going to take to develop a human brain that can completely replace the natural brain.

    Despite of this accomplishment in the field of artificial intelligence, it couldn't crease people from believing that science can't stand alone. For instance, AI can imitate human brain and most of the time outperforms it, but there are still a lot of hidden secrets. AI outsmarted Ke Jie has consciousness unlike the AI, Ke Jie felt sad when he was defeated and buried his face in his hands but the AI didn't feel happy and celebrate his victory.

    The computer of 1960 is the same as the computer of 2017 in terms of consciousness, there is no signs so far telling us that there is an algorithm(运算)that can make a conscious computer and decipher (译解) its feelings. We can predict what the future will look like according to the past, especially from scientific point of view but the development of human brain seems unpredictable and unknown.

    Do you have a talented young artist, photographer, or designer in your life? It's never too early to start helping them get their work out there! We've rounded up the top art contests for kids and teens that can help these young creators share their first masterpieces with the world. Best of all? Most of them are totally free to enter!

    Global Canvas Art Competition

    Ages: 16 and under

    Mediums: Drawing, painting

    Global Canvas is all about the environment. Launched by the David Shepherd Wildlife Foundation, this art competition wants to inspire the next generation to be more mindful of how we take care of the earth. The judges are looking for artists to capture the wonderful places that wildlife call home.

    Toyota Dream Car Art Contest

    Ages: Four to 15

    Mediums: Drawing, painting

    Time to design a dream car! Toyota wants to get junior artists thinking about what the future of transportation might look like. Prizes include cash and a chance to tour one of the Toyota manufacturing plants.

    Advena World's art Competition

    Ages: 15 and under

    Mediums: Drawing, painting

    Advena World's art competition aims to promote creativity and self-expression. Instead of a theme, they ask the participating artists to simply express their feelings—anything from sadness or joy to anger or excitement—through their chosen medium,.

    Progressive Young Artist Awards

    Ages: 13 to 19

    Open to: All international applicants

    Mediums: Painting, drawing, photography, mixed media, sculpture

    Cost to enter: $5 USD

    PYAA is all about expressing and celebrating progressive values. So, if there is a creative teen in your life who wants to do good in the world, sign them up for this art contest for teens. The prize is a scholarship which they can put toward their post-secondary schooling.

    Josh Katz works at the New York Times. His common job is to use information to tell interesting stories. In December 2013, Katz built a quiz on the Times website. It asked people about the words they used to describe things and events. It also asked how they pronounced common words. The quiz then used people's answers to decide where in the United States they were from.

    The quiz got more than 350, 000 results. Katz turned the results into a book. In Speaking American, he studies regional differences in how Americans talk.

"A lot of people's language shows who they are and where they are from, in a very personal way", Katz said.

Katz says people are often surprised to learn that the way they talk can show where they grew up. Most Americans don't realize they use regionalisms — or words and phrases specific to a particular part of the country. But just about everyone does. Almost every major U.S. city has a few unique terms. For example, in Philadelphia, Pennsylvania, the night before Halloween is known as Mischief Night. Anyone who calls it that is likely to be connected to the city.

    Katz himself was surprised by how many common words are regional. "There are a lot of words I use that I just thought were standard words," he says. "Then I found out some of these words were actually a product of my upbringing."

    For example, he says, "I thought everyone said 'sneakers' (运动鞋) and not 'tennis shoes'." But it turns out "sneakers" is connected mostly to the Northeast. That's where Katz is from.

    Some scholars think that language in the U.S. is growing more homogeneous (同类的). But Katz disagrees. "These regional differences are here to stay." he says.

    Not only are people still using common regionalisms, but there are new ones appearing all the time, according to Katz. There's no way to predict how language will change in the future. But Katz sees more changes coming. "The only sure thing about language is that it's going to keep moving." he says.

I love hiking. In the mountains, the birds sing for me; the various trees and flowers overwhelm (征服) my eyes and the deep blue of the sky inspires me and makes me feel calm. Furthermore, I can breathe the fresh air, keeping away from the dust and pollution of the city. It seems that all my senses are awakened when I am in the mountains. More importantly, hiking teaches me a lot.

I have been a traveler since childhood and was drawn towards mountains and their beauty. Later my reading several travel books made me think if I could also go on such journeys. Finally, I decided to give it a try. After I was well-prepared to face all difficulties of the hike, I joined a group of hikers. On the way, we encouraged each other, took beautiful pictures, and sat down now and then to feel the breath of the land. All my worries disappeared and we talked and laughed just like kids. This journey excited me for a long time.

I never actually realized the need for water until I started hiking. I remember once I was on a hike where our water was not enough. It was a night hike and the next day we had to return back to our base camp following the same route. So we have to save it for emergencies (紧急事件).That day I exactly learned water is of great value and that we have a duty to save it.

Besides enjoying the beautiful natural views, you have to go out of your comfort zone and push yourself hard to challenge your normal limits when hiking. On a hike, you may sometimes get injured but you can't stop until you reach the destination. Every next try will surely make you stronger and happier if you embrace (拥抱) your injuries, pains and discomforts.

Sometimes we may have a conversation with those locals living in wooden houses. You know, mountain life is hard and difficult. But they never complain about their life. They are happy with what they have. Many times they are facing extreme weather and they just fight with them. They are so brave. What can we complain about?

If you walk slowly through downtown Helsinki(赫尔辛基) during the day,taking in the splendid 19th century buildings,white boats and noise of passing trams(有轨电车),you will start to understand why it is called a city of two colours:white and blue.

The sea is always present in Helsinki.When you take a walk over the great open space of the central square,you will hear seabirds screaming.When you take the tram,suddenly and unexpectedly,you are faced with a calm,shining blue sea.You may notice that people in Helsinki do not rush about as in other cities.Instead,walk along the roads,politely letting other people by.

A usual way to see Helsinki for the first time is to start out by the boats.You will walk by the elderly women selling fish and vegetables in the market square and find yourself in front of a beautiful park.You may enjoy a pleasant walk in the park for a few hours and then take the tram.Trams are the perfect way to get around in Helsinki.Watching the old houses,parks,theatres,churches,shops,restaurants and people in the streets,you may have a slightly sad film feeling to it.

The pale summer nights are another wonder in the city.Following waterfront(滨水区) of the city after sunset,you couldn't help stopping and listening to the sweet silence,interrupted only by the screaming seabirds and leaving fishing boats.

However,in some way,Helsinki is also the most modern city in northern Europe.You will surely want to visit the white Glass Palace,the art museum,all those extremely popular cafes and design stores.