techno is marie to davison chapel to queensland to see firsthand one of the seven natural wonders of the wild. and to explore the scientific efforts to save it. ask a thousand different people to describe what makes australia's great barrier reef special and you'll get a thousand different answers and sometimes none at all just to be new silence a nod to the fact that there exists things on this earth so beautiful he defied description and yet for all its capacity to inspire us on an intimate level it's when we step back that we are even more amazed the great barrier reef covers three hundred forty five thousand square kilometers roughly the size of germany it stretches twenty three hundred kilometers in length nearly equal to the entire coastline of chile and it's the only living structure on earth that can be seen from space and therein lies its vulnerability because it lives it can also die. although coral reefs cover less than two percent of the ocean floor twenty five percent of all marine life depend on them for their survival and yet according to the world resources institute

increase the risks the epidemiologist is hoping to counter scientific myths such as detox with facts davisonshaft mr. science wants to bring the truth to light and he wants to dispel myths rushed into it once to explain links and determine whether treatments help or not. the aim is to find out more about the human body for example. million crist works for the nationwide narco health study narco is the german national cohort and has been running since two thousand and fourteen the scientists want to examine two hundred thousand people at regular intervals over a period of twenty to thirty years. the scientists have set the bar high for their study all the tests are strictly standardized from the questionnaire to the smell identification test. despite great progress in many areas science often cannot find simple solutions to complicated problems that clemens i should mention our of course people cling to results that sound like they can be put into practice easily. if the study says he just have to do x. and y. and you'll live ten years longer then that's reported on by the media because peopl

davison about 4:30 yesterday morning. investigators say the flames raced through the house. fire crews were able to keep it from spreading to homes next door. one person died in the fire. another person was hurt. so far police are not giving us any information about the victims. >>> well, the first of hundreds of millions of dollars of bonds to bill more a affordable huesing in santa clara county have been sold. it is part -- housing in santa clara county have now been sold, part of a $950 million bond called measure a, providing housing for vulnerable populations, as well to help new home buyers. the $250 million in bonds was sold last thursday. the remaining $700 million will be issued over the next three to ten years. >>> california water officials say no matter what kind of weather we have this winter, the oroville dam will stand up to it. wednesday is the deadline set by the state to have the 770- foot tall dam ready to release water. if are five months crews have been reinforcing the structure and pouring concrete to repair the spillway damaged in february. you may rem

chris davison is from north korea, and one from south korea. from iowa -- how big is the need here? >> it's big. >> here on the mountainous west side of the island, people say they see little if any federal response. >> reporter: marie gonzalez has cans and is desperate need of a generator. >> do what you're supposed to do. >> reporter: the mayor who lost his own home and sleeping in a shelter says some aid is trickling in. cut-off communities are relying on this rough and tumble band of good samaritans. a group that has gone viral since posting this video on supplies are not coming in from san juan. >> reporter: we joined them on a mission to haul food and water to a neighborhood still trapped by a dangerous mudslide three weeks after hurricane maria. >> i would want somebody to help me. >> reporter: after a journey that takes hours. >> the real rambos. >> reporter: they arrive after sunset. why is it so important for you guys, private citizens, to step up. >> because they're americans. just like everybody here. if we were in trouble, we would want help, too. >> reporter: fema says

[audio en inglÉs] reportera: al igual que el adorado personaje, va montado en una harley davison.de paz. [audio en inglÉs] reportera: y aunque la cifra que ha colectado para su causa lo supera, este capitÁn de la esperanza siente un gran orgullo por el destino de esos fondos. [audio en inglÉs] >> Él dice que su mejor recompensa desde la reacciÓn de los niÑos. [audio en inglÉs] [audio en inglÉs] reportera: dices que van a regresar a tu ciudad durante el dÍa de halloween. vas a estar completamente listo? >> exacto, sÍ. [risas] alan: y aparte al hermoso. ana: si los super hÉroes no sÓlo existen en las pelÍculas. quÉ bien verlos en la vida real llevando este mensaje de paz, de amor y de compartir. alan: de carne y hueso. Él regresa a colorado el dÍa de halloween para poder celebrar. esas son las bonitas cosas con la diferencia entre el bien y el mal. astrid: karlita, hoy te traigo un video que se ha hecho viral en social media. es un niÑo colombiano que ha hecho algo sorprendente en las Últimas horas. dicen que los niÑos son quienes hacen de la vida de otra forma y que nos enseÑan de