If we are observant(善于观察的), we can find that most of the flowers in nature are red, orange and yellow. If we have seen a black flower, it is a chance in a million. People have made census (统计) to colors of more than four thousand kinds of flowers and discovered that only eight of them are black. Why are black flowers so rare?

    As we know, sunlight is formed by seven different kinds of colored light. The wave length of each light changes, so the quantity of heat in each light changes, too. Flowers, especially their petals (花瓣) , are very weak and easy to the harm caused by high temperature. Black flowers can take in all the light waves, which cause the flowers to dry up in a high temperature. So the black flowers can hardly continue their lives. While red flowers, orange flowers and yellow ones can protect themselves from sunlight by reflecting（反射） the red light, orange light and yellow light, each of which has a large quantity of heat.

    That is why red, orange and yellow flowers are very common in nature while black flowers are so unusual.

    Academy Awards    The Academy Awards are the most prominent film award in the United States. The Awards are granted by the Academy of Motin Picture Arts and Sciences. Academy Awards are nicknamed "Oscars", which is also the nickname of the statuette（小雕像）. The name is said to have been born when Margaret Herrick saw the statuette on a table and said: It looks just like my uncle Oscar!"

    Berlin Film Festival    One of the "A" festivals in Europe. The Berlin International Film Festival, also called the "Berlinale", is held annually in February and started 1951 after an initiative of the American, who occupied part of the city after World WarⅡ. The jury（专家评奖团）always placed  special emphasis on representing films from all over the world, from the former Eastern Bloc（集团）Countries as well as from western countries. The awards are called Golden and Silver Bears （as the Bear is the symbol of Berlin）.

    Venice Film Festival    The Venice Film Festival takes place every year in late August / early September on the Lido in the historic Palazzo del Cinema, in Venice, Italy, its main award is the " Leone d'Oro" （Golden Lion）. Recently, a new award has been added, the San Marco Award for the best film.

    Cannes Film Festival    The Cannes Film Festival is a famous international film festival. It has been held annually in Cannes, in the south of France, since 1946 with a few exceptions. Given massive media exposure, the Festival is attended by many movie stars and is a popular venue for movie producers to launch their new films and attempt to sell their works to the distributors who come from all over the globe.

    The most famous award given out at Cannes is the "Palme d'Or" （Golden Palm） for the best film; this is sometimes shared by multiple films in one year.

    A recent study surveyed 5,000 British families about their experiences with volunteering and their mental health. Participants completed the same survey every two years from 1996 to 2008.

    About 20 percent of the survey participants reported doing regular unpaid work Researchers found that these volunteers also scored highest on their mental health scores. The two were linked so directly that the more a person volunteered, the happier they were.

    One could argue a chicken-and-egg theory: happier people are more likely to have the time, money, energy and resources to give back to others. But even when researchers adjusted for education, social class and total health, the link was there, suggesting that the mental increase came from volunteering and not the other way around.

    According to Dr. Stephen G. Post, author of The Hidden Gifts of Helping, when you help others, your brain releases feel-good chemicals, which can help cells repair themselves and grow. And this translates to better health.

    So volunteering can help improve both your physical and mental health—on one condition. You have to mean it. People who volunteered for "self-oriental" reasons, either because they were forced to do so for work or school or because they were trying to get away from problems in their lives, had a mortality（死亡率）risk that was similar to those who didn't volunteer at all. It was only when people were volunteering out of a true sense of sympathy that they saw any health benefits.

    So whether it's arranging books at the library or walking dogs at the animal shelter, find a cause that's important to you and give it a try. Volunteering is a good way to develop a sense of connection that not only helps your community, but may also be good for you.

    The Dunning-Kruger effect is a type of cognitive bias (偏见) in which people believe that they are smarter and more capable than they really are. Essentially, low ability people do not possess the skills needed to recognize their own incompetence. The combination of poor self-awareness and low cognitive ability leads them to overestimate their own capabilities. This phenomenon is something you have likely experienced in real life, perhaps at a holiday family gathering. Throughout the course of the meal, a member of your extended family begins spouting off on a topic, boldly announcing that he is correct and that everyone else's opinion is stupid, uninformed, and just plain wrong. It may be plainly evident to everyone that this person has no idea what he is talking about, but he talks continuously, blithely oblivious (忘乎所以) to his own ignorance.

    The effect is named after researchers David Dunning and Justin Kruger, two social psychologists. They found incompetent people are not only poor performers, they are also unable to accurately assess and recognize the quality of their own work. These low performers were also unable to recognize the skill and competence levels of other people, which is part of the reason why they consistently view themselves as better, more capable, and more knowledgeable than others.

    This is the reason why students who earn failing scores on exams sometimes feel that they deserved a much higher score. They overestimate their own knowledge and ability and are incapable of seeing the poorness of their performance.

    “In many cases, the incompetent are often blessed with an inappropriate confidence, encouraged by something that feels to them like knowledge.” Dunning and his colleagues have also performed experiments where they ask respondents if they are familiar with terms related to subjects including politics, biology, physics, and geography. Along with genuine concepts, they added completely made-up terms. In one such study, approximately 90 percent of respondents claimed that they had at least some knowledge of the made-up terms.

    So what can you do to gain a more realistic assessment of your own abilities? Instead of assuming you know all there is to know about a subject, keep digging deeper. Once you gain greater knowledge of a topic, the more likely you are to recognize how much there is still to learn. Another effective strategy involves asking others for constructive criticism. While it can sometimes be difficult to hear, such feedback can provide valuable insights into how others perceive your abilities. Even as you learn more and get feedback, it can be easy to only pay attention to things that confirm what you think you already know. In order to minimize this confirmation bias, keep challenging your beliefs and expectations and seek out information that challenges your ideas.

Ecobee3 Smarter WiFi Thermostat

    Smart thermostats have become the face of smart home technology for most, but depending on what your home is like, it's possible to say the ecobee3 is superior.

    Most of the smart thermostats carry the same benefits, including the ecobee3. They can learn your preferences and schedules, and then adjust the temperature accordingly. They're better-looking and more enjoyable to use than the basic pieces of plastic that occupy most households. Their very presence will probably make you more conscious about saving energy. And once you're able to heat up or cool down your house from your phone, without having to get out of bed, you won't want to go back.

    If you live in a larger household, the ecobee3 can be much more convenient—provided you pick up a couple more remote sensors. Yes, it gets pretty expensive at that point, but having those gives you effective control over the temperature in different rooms around your house. In comparison, other thermostats' measurements are largely limited to the area in which they' re installed (安装).

    If you live in a smaller place, that's no big deal; the ecobee3 still has distinct advantages. It is touch-enabled and more spacious, making it less annoying when you want to enter a WiFi password, see weather information, and so on. Still, all the smart thermostats are pretty great. Which one is best just depends on whether you need a whole-home solution or a more straightforward one. For now, if it's the former, go with the ecobee3.

    Ecobee3 Smarter WiFi Thermostat with Remote Sensor, available at all shopping websites.

    A new "paparazzi-proof" scarf has got heatedly welcomed since launched. A new "paparazzi-proof" scarf could be a game-changer for celebrities who prefer to shy away from the stage light. The ISHU scarf is the creation of Dutch-born fashion entrepreneur Saif Siddiqui and is designed to "give people their right to privacy back". A host of celebrities including Cameron Diaz, singer Joe Jonas, Bayern Munich footballer Jerome Boateng and music producer Major Lazer have worn the ISHU after it was spotted at London Fashion Week last year.

    It works by reflecting the light back into a camera, effectively becoming "invisibility clothes" for celebrities who don't want their photos taken. Anyone wearing the scarf is protected from mobile flash photograph, with the fashion accessory's fabric(附件结构)effectively blocking out any unwanted pictures, although it doesn't stop no-flash photographs from being taken.

    The 28-year-old Siddiqui was inspired while visiting family in Amsterdam in 2009 when his friends attempted to take a photo of him using an iPhone in front of some bikes. "He noticed that the bike's reflector carried the flash of his mobile camera in a way that confused the faces of his friends in the picture." the ISHU website explains. "He immediately realized that if developed into the right product, this feature would be an ideal solution for his friends and is now available to the public who want to keep their private moments in public private. "Saif put together a team of experts who dug into the science of light and reflection, and how to blend technology with fashion."

    He told Decoded Magazine: "The ISHU scarf effectively allows an individual to control what pictures and videos are taken of him." There are no more unwanted pictures and videos on Snapchat, Instagram, or Facebook! Everyone carries a phone with them nowadays that has an amazing camera. So, it all made sense to me." More ISHU products are set to launch in August, with mobile phone cases set to launch in the next few weeks. The ISHU is currently sold out but you can pre-order it online for￡289.