Fish hatchlings no more than a few millimeters in size are able to find their way home by smell, scientists from James Cook University found. After hatching from a reef, baby fish are often swept out to sea for miles. The scientists were curious how they are able to get back to the particular spot where they were born. “The team exposed tiny fish larvae in a tank to pure streams of water from four different reefs,” the article says. “To their amazement, within minutes a surprisingly high percentage of baby fish had congregated in the water flow from their home reef.” Every reef has a unique chemical signature. The scientists were surprised that so soon after hatching fish were able to detect that signature and use it to home in on home. The press release speculates on how this trait causes biodiversity by evolution. “We think some fishes then choose currents that smell like ‘home’ and swim up them. The ones that cannot do this perish. The ones that get home preserve the unique ‘ethnic’ make-up of their tribe — and so continue the process of evolving into separate new species.”The team did not see the fish evolving into separate species. Even if they had, they would be talking about microevolution, which is not controversial. It would contribute no argument to how the fish emerged in the first place with their remarkable sense of smell. For a fascinating documentary on how a salmon is able to smell its way from the open sea all the way back up to the particular tributary where it was born, see the film Wonders of God’s Creation by Moody Video.(Visited 8 times, 1 visits today)FacebookTwitterPinterestSave分享0
“All the problems in the world are basedon a breakdown of relationships, from thefinancial crisis right through to HIV andAids,” says Dr Garth Japhet. A still from the television series Hopeville,which aims to teach the values of theHeartlines campaign.(Images: Heartlines)Wilma den HartighWhen Dr Garth Japhet started his career as a medical doctor he had no idea he would one day pioneer Soul City and Heartlines, two highly successful social change projects.Japhet always knew that he wanted to be a doctor, but was never interested in opening a private practice. He had a desire to provide medical care to poverty-stricken people and decided the best way to do this was to work in rural and township clinics.He worked in rural clinics for five years, but soon became despondent seeing people’s everyday suffering .“I realised that I wanted to make a difference to people’s health in Africa and I wanted to find a way to communicate health issues,” Japhet explains.His first idea was to use newspapers. He approached the Sowetan in 1991 and started writing about health in a non-clinical and accessible way.“I wanted to write in a language that people could understand, make health issues interesting and relate it people’s everyday lives,” he says.But he soon realised that the written medium wouldn’t reach a large majority of South Africans – some of whom have no access to newspapers, or cannot read.He decided that a multimedia approach, including the use of radio and television, would be most effective. He went on to create Soul City, a series of programmes that examine health and development issues. Today it is one of the three most-watched dramas on South African television.His move to television was a major shift from the dusty township streets. But although he may have swapped his stethoscope for the television cameras, he says he is still a doctor, only using different tools.“Now I use communication instead of medication. I’ve just chosen a different medium to help people,” he says.Japhet is delighted at the major impact the Soul City series is having on people’s lives in South Africa. The programmes are also popular elsewhere in Africa, being broadcast in 10 countries on the continent and reaching about 45-million people.Japhet’s work didn’t end with Soul City. He then went on to launch the Heartlines project, an initiative to promote social change through promoting values.“All the problems in the world are based on a breakdown of relationships, from the financial crisis right through to HIV and Aids,” he explains.Heartlines also uses television to broadcast its message, through the highly successful Hopeville series. Hopeville, currently on SABC 2, attempts to restore relationships by telling the story of a community without hope transformed by one man’s courage to live out his values.Heartlines challenges people – irrespective of race, gender, age or religion – to live out positive values in a way that will build people, families, communities and the nation. Japhet believes that the vast majority of South Africans already aspire to a set of good values, which, if lived, would transform our country.He says that television is predominantly a medium to provide entertainment, but it can also be a powerful tool to bring about social change. South Africa is no different – at least 85% of the population can access television.“It is my firm belief that media drives culture,” he says. “Television should not just be about entertainment, but also about doing good.”Their goal is to reach 80% to 90% of the South African population, but it seems as if Japhet and his team is already successful in communicating their message.“The Heartlines films have been extremely well received and have won numerous awards for film excellence,” he says. Other African countries have also expressed interest in the programmes. Zimbabwe will soon flight the first Heartlines series in an effort to help restore relationships in that damaged country.He adds that the story-medium has also contributed to the success of Heartlines: “We found that story-based programmes instead of talk shows is the best approach, because everybody loves a good story.”What is next after Hopeville? Japhet is already started working on developing the Movement for Good, a new initiative that will use cell phone text messages and the internet to inspire and motivate people to take action for good. It will be membership-based and anyone can join. The Movement for Good is another step in the right direction to make South Africa a safer, healthier and more compassionate place.Do you have queries or comments about this article? Email Mary Alexander at [email protected] articlesIt starts with youPreventing HIV with OneLove An open solution to healthcare Children’s radio, by children HIV/Aids in South Africa Useful linksSoul CityHeartlinesMovement for Good
Share Facebook Twitter Google + LinkedIn Pinterest By Emma Sutherly, Chapter Reporter.The Agricultural Advocacy Committee of the Miami East-MVCTC FFA Chapter recently sponsored a coloring contest at Miami East Elementary. The event was held to celebrate National Sheep Day on Saturday, October 26.Members of the Ag Advocacy Committee challenged the students in Kindergarten and were given a sheep picture to color. FFA members evaluated the pictures and awarded first place to each homeroom. The results are as follows:Mrs. Amy Gerlach – Harper AddingtonMrs. Stephanie Larson – Grant DavisMr. Preston Elifritz – Weston YoungMr. Justin Roeth – Luke KnoopEach student participating received a pencil, bookmark and candy treat. The first place picture in each homeroom was awarded a special prize of a sheep stuffed animal. Congratulations to the winners!During the event, the committee members shared that baseballs and tennis balls are both made from sheep wool fiber. Sheep have a fantastic memory and can retain identification of people or places for many years. Miami County is home to multiple sheep producers and farmers.Members of the Agricultural Advocacy Committee involved in the project were Ella Demmitt, Ethan Fine, Keira Kirby, and Adi Richter.