Amazon manatees. The world is in a sorry state and getting worse right a look at the news might make you think but the data show many positive developments a Research Project in oxford anxious to make the move his appeal to the public at large. Oxford university in england is one of the best in the world and one of the oldest. Its tranquil beauty contrasts with the intellectual dynamism of it scholars. Its a tradition to challenge tradition overturn received wisdom and extend the boundaries of knowledge. Meet Hannah Richie their research focuses on Global Development and environmental sustainability part of her work is to care. And publish lots of data. Really. Understand the world as it is i think its vital and most of the developments weve seen in terms of human wellbeing have been positive hannah actually works at the Oxford Martin school a Research Unit founded in 2005 she and her colleagues work in Interdisciplinary Teams on ways to enhance the wellbeing of people across the planet and to find solutions to the worlds urgent challenges such as Climate Change and child mortality. They also gather and present Research Findings on a platform called our world in data for all to see. And i think a lot of the questions that people house researchers know they are the study of this stuff every day that it is there but its kind of what the academic paper. And really kind of quantitative easing is that no one of our friends so really what we bring together are either Academic Research from publications are these kind of International Data set the world bank. And then we kind of tried to bring it to life to take an example literacy in 1900 most adults around the world could neither read nor write 100 years later the number of illiterate adults had fallen significantly today only 14 percent of the worlds population is illiterate in other words nowadays 86 percent can read and write. Take vaccination today the percentage of infants immunized against diphtheria whooping cough. In 1900 few infants were vaccinated against how tight is being now 80 percent. So things are better than many may realize yet its hard for people to access comprehensive and reliable information on the state of the world these were 2 key findings of hans rosling. The swedish physicians statistician who died in 2017. Its not that he was an optimist or pessimist for that matter he was really into facts i have just one little humble advice to. Everything else look at the day. Look at the facts about the world we undeniably face huge shock is that good news is that the future may not be quite as gloomy and that mankind already is doing better than many of you think. 2015 survey of 17 countries did indeed find that a clear majority of people there think the world is getting worse rosling identified a key driver of global pessimism the media he said they were not to be trusted and fail to provide the big picture the Oxford MartinSchool Website also says but popular misperceptions reveal a failure of our media and our Education Systems news outlets tend to focus on horrible or particularly dramatic events. Drawn i think just from a psychological perspective we want to know whats happening right now. And like even i suffer from this even though i try to take a long term perspective i want to know whats happening right now in the world so im kind of drawn to these events so i can solve. For. The much. Documenting positive developments is not meant to encourage complacency progress requires hard work and the Oxford Martin school is busy developing solutions to humankinds great and terrifying problems. When its about teaching common sense tends to fly out the window too much food or too little healthy or unhealthy psychologists outlet. Kinds of surprising influences how we ate depends on. Sitting with at the table. Everyones experienced it regardless of your plans to eat only healthy food hardly anyone can resist potato chips at a party. When food is involved we are very much influenced by those around us. Other people may influence how much we eat. It for slim person next to us a lot were more likely to tuck into after all it doesnt seem to harm but next to an overweight person who eats a lot it can actually put us off our food. The healthiest influence would be skinny people eating small or normal portions. Emotions also play a role in eating we compensate our feelings by rewarding ourselves with food our Favorite Foods activate the brains reward mechanism incidentally people suffering from obesity are likely to need more of a stimulus than people of average weight when it comes to feeling that reward and if we know what our idols like to eat that can also influence us and that begins very early in an experiment kindergarten children were asked to imagine a favorite superhero eating lots of fast food and immediately they all wanted more fast food. But its better not to have idols when it comes to eating those who commit to a healthy diet voluntarily get the most benefit people who are forced to eat healthy rather than sweet get hungry again after a shorter time than those who choose to eat healthier conversely those who are made to eat sweets experience less guilt and are more creative and concentrated than those who voluntarily soon would switch. Its. Bad be careful if youve eaten especially healthy food for lunch you could have a relapse in the evening psychologists call this the licensing effect you could also call it fooling yourself when it comes to eating were easier to read than one might think. But how do we read khaleds. The significance of colors varies between cultures in many western societies death and sorrow are indicated by the color black. In bali in indonesia its white. White in mexico its yellow in other bright hues but what effect 2 colors have on the human psyche. Color is captivate as they stimulate and evoke emotions. There are many beliefs about the specific impact of colors for example on peoples cognitive performance or their emotions mentioned. Red is said to be invigorating blue it helps us concentrate green is relaxing but is there solid scientific proof for this to find out were going to observe 3 experiments. Psychologists daniel overfed to still wants to know if his test subjects respond physically to color to do this hes going to measure their skin conductance it increases for example when our hands where due to emotional arousal. He shows his test subjects for colors its not just the hue that carries red green blue and grey but also the saturation and brightness of the color. The test subject also have to write down how they feel relaxed and calm agitate. And or aroused are they in comfortable and happy or do they find it pleasant and feel happy. Finding and sometimes even with a very intense colors i immediately had a more unpleasant feeling. But did these feelings correspond with the test subjects physical responses well have to wait for the results in the meantime we move on to the 2nd experiment. Thats a welcome to our test on which temperatures are comfortable will vary the temperature throughout and every 10 minutes ask you to rate how you feel. What the test subjects dont know is that the ambient light of the room theyre in has a particular color temperature one group is sitting in light thats comparable the Bright Sunlight with strong red and yellow towns. The 2nd group is placed in a light with a strong bluish turn similar to the light conditions on a cloudy day with both groups the Room Temperature is lowered steadily from 24 to 20 degrees celsius. Examines whether the lighting influences the test subjects responses. I assume this experiment wouldnt show any influence at all why should the color of the lighting affect the way people perceive temperature. Does a warm red light make us feel warmer than a cool blue light. At what temperature will the test subjects reach for a sweater or jacket. Back to experiment and the question of how colors affect our emotional state there are 3 clear results. The majority of test subjects felt most comfortable with colors of medium intensity regardless of whether theyre red green or blue. Highly saturated intense colors elicit the strongest physical response skin conductance increases showing that the test subjects are feeling around star even agitated the researchers still dont know exactly why thats the case. On current one possibility is that highly saturated colors are relatively rare in nature so maybe theyre especially eye catching and have a particular significance. Highly saturated red has an especially pronounced effect. That. Because red is often used to signal danger or strong emotion and thats what weve come to see at the color with. Consider Something Like a flushing meaning when people become red in the face that can be due to arousal or stress due to physical exercise for example or intense anger or possibly due to sexual arousal. So it might be plausible that when we see the color red we are reminded of that kind of situation and that reminder in turn elicits physical arousal as a response. A 3rd experiment is meant to determine whether ambient color has an impact on our cognitive performance according to the lighting manufacturer these colors have a direct impact on our emotional state this pink is supposedly relaxing the blue and hence is attention and concentration the red is stimulating and neutral white is the control. And this experiment 170 High School Students are given a battery of tasks that assess their spatial skills short term memory and logical skills so did the students notice any effect did they feel unusually concentrated focused or relaxed. And not really its a pleasant color but i cant say i noticed that or had any effect. So i didnt notice anything special. And they were right in this test at least the results showed that none of the colors had a significant positive or negative effect. So this experiment showed that color doesnt have an impact on cognitive performance or emotional state. What about the results of the Room Temperature experiment. At 24. 00 degrees celsius both groups were comfortably warm at 22. 00 degrees most of them started to feel chilly and put on a sweater when the temperature dropped even more something unexpected happened for the. Group in the cool blue like a sweater wasnt enough for the test subjects and the one red like it was only 6 percent put on a jacket. For the subjects under the blue light it was 60 percent. So it would seem that when it comes to cool and warm light we do feel what we see. Season him to imagine youre sitting in direct sunlight the color temperature will be more red and yellow. When youre sitting in the shade or under a cloudy sky the light will appear a bit more blue and usually its colder outside vent to my assumption is that weve learned to associate color temperature with the ambient temperature. Warm likely to warm thoughts that would seem ok still a lot to learn about the impact of colors but they do appear to affect us sometimes were aware of it but often were not. If outline is red why auburn higher than leaving here it is do you have a science question you always wanted answered when happy to help out send it to us as a video text or voice mail if we answered on the show well send you a little surprise come on just ask. This week of you in tanzania sent in a question. Could be such a thing as a time machine. Little jim would love to visit ancient greece. Or hang out with our early human ancestors. Or see dinosaurs up close. Hes not the only one whod like to travel in time the british writer h. G. Wells popularized the concept with his 895 novel of a time machine in which an inventor travels to bleak worlds in the distant future. In 1905 Albert Einstein published his special theory of relativity showing that space and time are not separate quantities but aspects of the same thing and shrink and expand relative to one another. 10 years after that in his general theory of relativity einstein showed that gravity is the warping of space time that means for an observer approaching a massive object like a black hole clocks run more slowly. Lets send him on a trip a thought experiment on the basis of special relativity. We dispatch him to a star and bring him back. At a speed close to that of light from his point of view jim needs say 10 years for the trip but meanwhile on earth half hours and years have passed. So jim has effectively travel to the future because of his speed time passed more slowly for him than for people on earth so what about travel to the past some physicists think it is indeed possible but its hardly practicable nobodys going to set off next week luckily imagine if jim fell in love with his great aunt have children with her and rewrote the course of his family history. Better to send him in a present to the us a comma desert in chile where the our Radio Telescope array picks up signals emitted billions of years ago in far reaches of the universe or to orbiting telescopes like hubble and planck they are the real time machines that tuned to look into the past. As much as 39800000000 years ago the early days of our universe when a mass of hot gas began to condense into all the galaxies we know today. For more science stories check out our website or visit us on social media. We asked you on facebook if you had a time machine what time and place would you travel to. Market album i would go back to the time of the 969. 00 woodstock music festival. Mentone about davy i would go back to his early life to correct some errors. Allem which at marco from indonesia would like to return to a time when everyone was a cool without. Ethnic differences and migration. Of our own silver brand would take a journey far into the past to find out what dinosaurs sounded like and whether they had fared as. Richard around would also like to return to the age of the dinosaurs to find out for sure why they died out thanks for all your answers. Maybe a trip to the distant past might clear up the question of whether these 3 animals the manatee the elephant and the rock hyrax shared ancestors in africa. Scientists can study their genealogy without a time machine with the help of genome analysis. The amazon manatee is now found in south america but its under threat in the peruvian town of a key toss people are working to say the gentle preaches. The eat. The amazon manatee lives in fresh water along the river of the same name its tributaries and nearby lagoons. It can weigh more than 400 kilos and grow to almost 3 metres in length and even so many people here have never spotted one in the wild. In monotheist the manatee is the biggest species of mammal in the amazon basin but its probably the least well known i think when we started working here 80 percent of the people in e. Q. Tours had never heard of the creature. Thank you both. You stand here this this base here. This stretch of the amazon in peru looks indelicate. But there are environmental problems here too. And many species are under threat. From. Manatees are classified as a vulnerable species thats one step before endangered. We dont know how many amazon manatees there are. Here its really hard to determine the number because the water is so murky elsewhere its easier you just fly over the area in a little plain you can just see how many manatees there are along the banks and shores what we do know is that in many places people used to see manatees but dont anymore and every year there are more and more places where they are no longer to be seen it. Not be monotheist says the Amazon Rescue Center in looks after several species of animal and it may be the worlds only nursery for manatees preparing them for a future in the wild the babies have to be bottle fed every 2 hours until theyre 2 years old theyre lactose intolerant so theyre given special milk imported from the u. S. Bringing up baby can cost more than 10000. 00 a year. Manatees are under threat for several reasons the ban on hunting down isnt always observed their meat is considered a delicacy some get trapped in fishing nets and drown when they cant come to the surface to breed another problem is that people like to keep manatee babies as pets because theyre so cute. I want sometimes babies get caught in fishing that and are then taken home. People keep them in their fish pond or in a tank but under these conditions the little ones always die. Waiting. Manatees have no natural enemies apart from human beings theyre trusting creatures and dont shy away from people which makes it all the easier to hunt them for their meat skin and or oil. When they come up to brave a hunter will stick 2 plugs of wood up their nostrils its an extremely cruel way to kill such a noble creature which is so important for nature. Manatees do indeed fulfill an important. In the environment theyre vegetarian and have to consume huge amounts of aquatic plants as theyre not very nutritious up to 70 kilograms a day theyre grazing helps clear waterways and lagoons. Manatees eat aquatic plants like this or water lettuce and other plants that grow on the surface in areas where manatees have been killed off the plants just grow and grow and spread across the Water Surface. The light of the sun cant enter the water about reduces the growth of plantain which affects the entire food chain and reduces the number of fish that in turn affects the People Living along the amazon they have fewer fish to eat and cant even go fishing if the Water Surface is overgrown. Its a real problem aquatic plants on the waterways and lagoons of the amazon are spreading even to other countries such as colombia where there are no hungry manatees keen to meet them and the water hyacinth for example is toxic to some of the animals living there horses and cattle can eat this plant but there simply arent enough of them to control the spread. Back at the Amazon Rescue Center any key tell us theres been an unexpected but very happy development. I think every 6 months we gather in the manatees to weigh them before we release them we were totally surprised to find 2 babies among them in the prerelease pool thats amazing news for peru because its the 1st time that manatees had offspring in captivity. That the center has so far rehabilitated 25. 00 manatees every release is a complicated procedure and a big event the staff and friends all join in. The manatees are taken to a suitable location before the final farewell. To the lagoons and rivers are interconnected so manatees stand a good chance of meeting fellow creatures in the wild. The efforts of the devoted team at the rescue center are contributing to the well being of the adorable animals and the stabilization of the ecosystem. The. Plants of the genus and some are often seen as well but it turns out that some varieties absorb nicol from the soil now scientists are trying to recover the metal sources ill focus next week on tomorrow today join us for that by. On the road with our superheroes my mission is clear. And nikko slowly explore germany. They dug him and everything out theres a lot going on in. Germany tried and tested again. Coming up on w. Grappling hooks some tricks. Expressing feelings i am not very creative yet but i would love to be considered an artist mandate looking for new perspectives to do it and not be replaced by a previous candidate doing things differently. Come to the place where we reflect on society armstrong didnt. Come to spawn d. W. Passion a drama competition drive marketing numbers on this here help fight thats hype and childish fights money. Fans times 5 spams and 5. Because when the sun. Come up to go off on you tube. Joining us. Each stone tells my story. Of the people turned to me bill to me dedicated to me. I am not a dumb to. Listen closely and i will tell you about the room days who bill to me on. Sunday. Not to don defending. My city days for centuries im tired of company my country through its finest hour. Until the day i need a vanished. Im still not to dumb to tell you. What. This is d. W. News and these are out top stories british Prime MinisterBarak Johnson has been taken to hospital with persistent coronavirus symptoms downing street says hell spend a night in hospital for tests the Prime Minister 1st fell ill weve covered 19 at the end of march and. Also in Britain Queen Elizabeth has stressed the importance of social distancing in a rare televised address to the nation the queen no