most people. want to use today of the future of. g.w. dot com for the megacity the american. culture. welcome to to morrow today the science show on t w. despite our best efforts we still haven't discovered life on another planet not many fulfill their requirements for humans spaceflight is a risky business to smart dummies while hope is not wished exactly how dangerous it is. water covers much of our planet.

it also fills much of our body. we couldn't live without it it serves a whole range of vital functions. highrise vegetation is trending plants clean and cool the air but how do you want her garden in the sky. cosmic radiation from space is something else it's all over the place and it's heading for us all the time luckily earth's atmosphere shields us from a lot of it. how much of it reaches the ground depends on the elevation. near sea level as in hamburg it's not so much it's a lot more in mexico city at over 2000 meters and it really goes up on mount everest and in the plains up in the sky.

so what about astronauts how dangerous is it for that. the german air space center in cologne has 2 new recruits waiting for their 1st into space. and soha are what they make his call human phantoms. physicist thomas bag-o. wants to deploy them to find out how dangerous exposure to cosmic radiation is faster not just taking a trip to the moon those days were gone missing and marrying the phantom is a replica human it's an ideal test subject for measuring the effects of radiation from one form of card on myth and took on. the medical dummies comprise a stack of contoured layers each containing plastic replicas of human bones organs and tissues.

a range of different density materials are employed to reflect the diverse structure of the human body. on them or god is a problem with our organs is there disparate levels of sensitivity to radiation the blood forming organs are far more sensitive than our skin. and to find out how big the risk is for an astronaut in outer space we have to know how high the radiation is on the surface of my skin or in my lungs or in my reproductive organs and my spinal cord for ransoms were gone and. in one and mark. special crystals are placed inside the dummies to measure the exposure to radiation jaring a spaceflight. each

domain has over 2 and a half 1000 of the crystals distributed around its body. the measurements generates a 3 d. model of the radiation dose absorbed by the dummy showing how much each organ is exposed to. the invention abel's the experts to determine the potential risk of cancer for an astronaut traveling to the moon. is the 1st time we enter interplanetary space with a phantoms and. measuring radiation in the spacecraft built specially for these research trips to the moon it's unprecedented. on board the orion spacecraft that will also be conducting tests for another radiation risk it only rarely occurs but it's a serious matter for astronauts. radioactive proton storms on the

east into space by solar flares. this nasa video shows how astronauts should react when a proton storm is headed in that direction. they build a protective shelter made of blocks filled with water or plastics where occupants can take cover until the storm has passed by. another option would be a radiation protection vest. one of the 2 dummies manning the upcoming arayan flight will be wearing such a vest for test purposes for physicist thomas bagger and so has mission is a unique opportunity. very concern is of course in a word for sure it's cool it's worked for her it's so much fun to putting this interim back to us it's great to see us being able to send helga and so hard to the moon and bring them safely back to earth for but where does your 3rd go to.

so exposure to lots of radiation means the risk of getting cancer is high if humans wanted to colonize space they would need a lot more than sunscreen. but what conditions are required for any form of life to emerge and survive whether here or elsewhere. that's the subject of a question submitted by one of our viewers. which planets other than earth could support life. our planet is home to a remarkable diversity of life. life as we humans define it requires certain conditions to develop and flourish.

it takes a combination of numerous factors for life to form. for billions of years the light emitted by the sun has provided a stable environment for life. the earth orbits the sun within a zone where temperatures are just right to maintain liquid water on the planet's surface. orbital region around the star in which a planet can possibly support life it is called the habitable zone for earth too close to the inner edge of this zone its water would boil away as. steam and if it were too close to the outer edge its water would freeze solid. astronomers have identified over 4100 planets orbiting distant suns exoplanets.

the nearest known star to the sun proxima centauri is orbited by a planet called proxima being within the habitable zone that means water could exist as liquid on its surface. most earth like in terms of size and surface temperature teagarden is high on the list of potentially habitable exoplanets and then there are planetary systems like trappist one this stars orbited by 7 planets of which at least 3 are in the habitable zone. some bodies in our own solar system could also potentially support life such as the icy moons of the gas giants jupiter and saturn they're outside the sun's habitable zone but below their surfaces our oceans that could be home to life protected by an

icy crust. if outlet is right why object data. do you have a question about science if you do send it to us as a video text or voicemail if we answer it on the show we'll send you a little surprise as a thank you so come on just ask if you can find us at d w dot com slash science on twitter at d w underscore site tech and on facebook at d w dot science. earth is unique. our lovely planet posts. more liquid water than any other astronomical object we have found so far. since we're talking about water did you know that it not only covers more than 2 thirds of the globe but also makes

up much of our body why is water so important to life. earth is covered with water h 2 o. one oxygen atom and 2 hydrogen atoms. most of the water on our blue planet is found in oceans. but on land it's also in rivers and streams and lakes this built up urban space looks bone dry but there's thousands of liters of water hidden here too in human bodies. up to 65 percent of the adult human body is water. by young body is as much as 80 percent water we lose water as we age. the body of an older person is around 50 percent water which is still a lot. that means that adults lug

a good 45 liters of water around with them it's an important structural component of the body now cells like the referee sites in our blood are embedded in watery solutions the cells would shrivel without it. steam our muscles would travel by 70 percent without water. and that wouldn't be much left of our brain either the brain is also about 70 percent water. it's impossible to imagine what we'd look like without water. the water in our bodies has further vital functions it helps to transport nutrients and oxygen to all the cells of the body through channels like the blood vessels the plasma the liquid part of blood is mainly water with dissolved substances and cells in suspension including immune cells and the red blood cells that carry oxygen

around the body. the water also helps the body remove waste through your anation for example. the kidneys use water to flush out excess waste materials. approximately one and a half liters of urine is excrete it from the body every day 5 or bladder. it's important to keep the body well hydrated we all need to drink a lot every day. water is a solvent and a agent. of the body can only process white of substances like salt with the help of water. water helps to break down food said. the body can absorb the nutrients. water is constantly at work throughout the

body. our metabolism needs water to function. water plays another important role in the summertime. it cools the body down. when we're too hot the sweat glands release our salty fluid through the pores which then evaporates on the skin. this process known as perspiration helps the body stay cool. that by maintaining body temperature. without h 2 o. human beings couldn't survive and not just humans without water there would be no life on earth. as long as we have life and water and the earth we think about the future we asked you

on facebook for your ideas about sustainable architecture. michelle taylor thinks in the future houses will probably be floating on water and can be moved from one place to another without needing any other vehicle. map nor from indonesia wrote to say his motto is back to nature he would like to build a house on a hillside with a view of rice fields filled with sustainable timber or perhaps a tree house. dimitrios writes we shouldn't need a house we will be living in a virtual reality forever now that's pretty radical. david drilling rights it would be nice if each house had its own power. solar panels batteries wind power etc that would be

a step in the right direction. too and rio no likes new technology could be 3 d. printed and not just out of concrete we could melt garbage to make plastic bricks or bricks out of fungus. wow thanks for all your interesting ideas. construction is booming in some parts of the world increasing prosperity and population growth are mung the drivers but an awful lot of natural resources are consumed in the process the supplies are finite and the environmental impact is often problematic song researchers are looking for ways to use smaller amounts of brawn materials in architecture. based researchers vita hasa and inspect a concrete roof element on display outside the institute for lightweight structures and conceptual design it's semi hollow but still stable their team's aim is to

develop concrete components with less mass thereby conserving resources the idea seems simple enough they take freshly made concrete and pour it into a mold. it's then turned into a hollow ball by spinning the mold while the concrete is drawing. divorced. the researchers then prize the results of their work out of the molds. and presto a hardened but hollow concrete ball. indeed a hymn to the smell of the our dear is for us to position the bowls in the relevant building component that's going on because they have an air cavity we save between 30 and 60 percent material in the component. of.

the researchers have come up with an ingenious way of getting the finished balls into position simply pouring concrete on to them won't work the balls rise due to the air inside them. so the ball on the left was set in place before hand with concrete ensuring it stays inside the box. the construction will not break unless it subjected to extreme stress. the roof of the institute is a precursor of the more famous construction spending munich's a lympics stadium. the lightweight and yet stable structure is a source of inspiration for the research done by stephanie vide not and now. they want to use actuators devices that move parts in a system to further increase the stability of constructions that are low in weight

and in resource utilization. hazardous forces flow off via the actuators in a similar style to of lightning conductor. the same principle also works with facades exposed to wind and storms. once the actuators are turned on they dampen any excessive and potentially dangerous fluctuation. i'm not in touch with this other than death man areas of application could include office high rises which have a lot of facade area and a lot of mass the fear facade flesh you have and if you. must a football top and here we can say you can decrease the amount of special material needed by deploying intelligent systems such as hydraulic actuators pneumatic actuators or fluid actuator we believe this will revolutionize construction in the

future. slender but stable constructions thanks to smart engineering a 2nd option for conserving resources. tomorrow's homes are increasingly resembling today's cars in terms of manufacture with a shorter lifespan but recyclable. horrific will see with people moving house more frequently it will either buy houses like we do cars or build houses like we do cars and then run toward lease them out increased mobility among the population will lead to a more frequent change of home compared to the previous century with. a vision of future construction faster cheaper and greener but no longer built for eternity.

zation and population growth are putting massive pressure on cities around the world. cities can be cool places to live but they can also get very hot literally. in urban heat islands he gets trapped the problem is compounded by global warming one way to make. cities more livable is to plant lots of greenery. when green replaces gray and skyscrapers start to look like vertical forests architects and urban planners have realized that these living walls are a way of making cities look a lot more attractive singapore is just one example. and greenery isn't just nice to look at it also has environmental benefits exactly what those are is the focus of hunger vacs research he and his project partners attesting the walls to figure out which plants are best suited to them. because in

here what we see here are sense and they contain measuring units this here is a small window a sensor on a 3rd and behind it 2 little permeable grades that allow air to reach the sensor with them we measure temperature humidity and air pressure then we'll talk the cables run through the vertical garden and into its immediate surroundings the collected data is fed into a mobile measuring unit. it shows how much greenery alters the surrounding microclimate it give you some. but this is what we call the cockpit and the data we're looking at right now show that the walls temperature is significantly lower than the immediate surroundings by about 4 to graze further from. the gable when the weather's hot plants emit lots of water vapor which

cools the surrounding air this is useful in cities where temperatures in summer are generally much higher than they are in the surrounding countryside well normal stone or brick facade store heat green ones have a cooling effect. but high temperatures can also dry the plants out. and keeping the greenery well watered in vertical gardens requires customized solutions. on this test wall in western germany the building material itself plays a role in the irrigation system. and the tip of the advantage of calcium silicate building stone is that it quickly absorbs and releases water and we take advantage of this by watering the manufacture of stone which then causes it humidity on to the substrate that optimizes the irrigation of the greenery. pretty surprising that stone is helping nature to flourish in cities

. here the importance of open green spaces is becoming increasingly clear parks provide benefits that vertical gardens can't but both help improve air quality. tiny openings in the undersides of leaves allow plants to absorb nitrogen oxide and carbon dioxide from their surroundings. and to release oxygen in this way plants act as both filters and africanus providing a valuable service in cities where the air is often loaded with vehicle emissions soot and other micro particles. green walls can even make industrial zones into healthier and more pleasant places. this firm makes a stone elements for vertical garden irrigation systems. this free standing wall helps filter toxins from the air. just cut off by shop sign up because of the large

fine dust that collects on surfaces like these. because look at the surface of the leaves you can see it. often going on surfaces also provide a habitat for intersects birds and microorganisms that have no other natural habitat in and industrial. with little limbs on. so this manmade system provides them with a place to live. in the in home field. for the last 3 years the project partners have been experimenting to see which plants are likely to flourish where in a vertical garden. south facing walls can develop an almost mediterranean character even in an industrial zone. i think yeah after that we get most sought here on a south facing side so we have been experimenting with herb's. if you we've tried our various things we've got basil meant

a lot of aged from our tomatoes garlic chard and a lot more. colleagues really enjoyed harvesting at all but the. vertical gardens are designed to bring pockets of nature back to cities. urban planners have long appreciate the value of horizontal gardens rooftop gardens might have a negligible effect on microclimates but they're great places to grow vegetables all just hang out. vertical horizontal it doesn't matter greenery is a valuable addition to concrete jungles. that's all for this week. on the next show be looking at beautiful fire salamanders there native to forests in central europe and they're in danger of

fungus apparently brought in from asia is decimating their populations. is the entire species at risk. biologists are searching urgently for a solution. join us for that on tomorrow today until then by.

i'm not often to the gym well i guess sometimes i am but i stand up and whip it up and thanks to you consider jam a culture of looking at the stereotypes of class but here think the future of the country that i not. yet need it seems to take from this grandmother day out to me it's all about who they are. by my job join me to meet the gentleman from d.w. . post. it's all happening. pretty.

sure a link to news from africa and the world. your links to essentially stories and discussions hello and welcome to student news i'm going to program tonight from foreign to me from the news of these eaves and why i would say d. deputed comes much africa join us on facebook d w africa. org 5 keys to city for food. police to prevent contamination. draw and cook foods to avoid cross contamination. cook 3rd to kill microorganisms.

keep food safe temperature. to prevent bacterial growth. use safe water and safer all materials to avoid content. producers are the ones primarily responsible for the safety of the food. but you can protect yourself and your family from seizes an old pipeline the 5 key is to say for food use them you also have a role to play. politics

shaken by another earthquake of the far right the woman tipped to take help from chancellor angela merkel is the standout on a good cop card and balances said decision will have no impact on the stability of the country's coalition government also on the program the death toll in china.