this is the ideal place to slow down and relax. check in in 30 minutes on the w. w. crime fighters are back africans the most successful radio drama theories continues to spend. the, all of the soda are available online. course you can share and discuss on the w africans, facebook page and other social media platforms, crime fighters, tune in. now, this is the sound of past having a feast. grain. we both unknown for destroying entire crops. this tube is designed to stop them in their tracks. ah, should we be worried that an asteroid could destroy janet as ah, and no more scalpels autopsies go virtual. this and more coming up on

today's episode. ah, welcome to tomorrow today, this time show unbeatable use. to establish the cause of a person's death date back centuries. ah, motive seas are conducted not only in the name of science but also just solve crimes. ah, for hundreds of years the techniques and tools didn't change much. ah, but now a new method could revolutionize an age old practice. ah, ah, ah,

some 23000 people die in traffic accidents every year in the european union. but it's not always easy to immediately establish the exact cause of the accident and the fatalities. ringback often there are said questions me. ready ready why did the driver lose control as to which side was the pedestrian hit? who is to blame for the accident? when it comes to forensic mysteries where victims are no longer able to tell their side of the story, it's up to, to solve the mysteries. for centuries, we've relied on 4 steps and scalpel and zurich forensic scientist, michelle italy, and his team, a breaking new ground that the pioneers, a virtual autopsies. the goal is to quickly establish what killed the person and how they died. currently forensic experts have to work alongside

police to determine from which side an accident victim was pit. oh, i knew technology is supposed to assist with this. the scan with millimeter precision the scanner photographically documents external injuries, 180 degrees from the front, them from the back. so in just a few seconds, the scanner generates a virtual duplicate of the victim. but a virtual autopsy is not just about speed because it's a digital render. the scan generates evidence that investigators can access years later. this also applies to the images from the computer tomography, the c t. this device uses x rays to scan the body several 1000 times in seconds. a digital image of the deceased interior is created. but what exactly

does it reveal? was the pedestrian actually hit from the left? here this bonus fractured in the middle. it was really intense. we have something there there and there. i'm not sure we should also look at the sco if it's less decided we should expect something on the left side, right? there's an impact on the left and okay, there we have that. yes, that confirms it left sided fraction says to near within minutes they have a classic autopsy would have taken up to i was in that the left side was head injuries done by the season. and the sco yes, due to this massive fracture wound daughters with the cause of death, that's the fraction of the break and then the bleeding into the brain. okay, well then we actually have the mystery of the pedestrians. death was solved.

but what about the driver? what caused his death like in many cases, the young man had been partying until the early hours before he got behind the wheel. was he intoxicated when he got into his com? this is the question that the virtual autopsy team is trying to establish as the cases book before the justice system. removing tissue from the deceased is the usual method. alcohol analysis is a laborious and expensive process. magnetic resonance spectroscopy can provide data more quickly and to determine if there was alcohol present, especially in the brain. the m r i machine works using magnetic fields and radio waves. the dpi of the hydrogen atoms in our bodies react in the magnetic fields. an m r i is therefore particularly good at depicting organs, and muscles is high water content. images,

the based on signals emitted by the hydrogen atoms in the water molecules during the scam. if a hydrogen atom is located in a molecule other than water, for example, ethanol, also known as alcohol. this changes the frequency of the signal. this allows alcohol to be detected using m r i spectroscopy. so even without a tissue sample, forensic scientists can determine the concentration of alcohol presence in a dead person's brain. initial estimate that's probably 0.8 to $1.00 pro mill and remain okay. but in the case of this young man, the test came back negative. he didn't like alcohol and only drank water at the party. is there another biological factor that caused him to lose control of his car? in a similar case, zurich forensic scientists,

once again going on a digital search for clues, with contrast, fluid, a post mortem and geography should make injuries in the vessels visible the deceased. oh say suddenly lost control, does the car could it have to do with a heart problem? if so, a digital tomography scan should show this but the forensic dog says, find nothing in the house itself. can the virtual autopsy still be used to find how the accident happened? smith smith, now we have to take a look at the main artery. when something happens there on the food on the hunt is indeed correct. the c t images show a small bit crucial injury. montage the blue to the bleeding of, of the heart. the cut in the i alter and there's,

we're glad how long on that one. so it seems to be a natural cause of death behind the wheel. bleeding and the a arctic arch causing death and we have it at the home in the a oh, that's what the forensic doctors have diagnosed in the young driver. the cause of a tragic traffic accident. blood flowing uncontrollably into the body, causing death. just one of the many forensic mysteries that can now be solved more quickly with new technologies. i was upon a time dinosaurs. but at some point they banished i was an asteroid, responsible for their demise. moral not coming up. i cosmic ball days and what could happen if they collided with planet

young from algeria off is summer base this an asteroid could hit us again. when the asteroids are cosmic, boulders rebel from the early days of our solar system. today most of them orbits the sun between jupiter and mars in what is known as the asteroid belt. if small asteroids get you close to jupiter, the giant plants gravity can divert them out of their stable orbits. and that can put them on a collision course with the earth. the straight asteroids can collide with other asteroids and thus create smaller fragments that then also with towards planet earth. which is why the sky is constantly being monitored to track down dangerous

asteroids and calculate their trajectories around 2200 asteroids that passed close to earth and are large enough to cause serious damage have already been catalogued of the around 1000000 known asteroids. some repeatedly, cross earth orbit like a purpose with a diameter of more than 300 meters. it's big enough to wipe out a city like berlin. in april 2029, he will come so close to the earth that it will only just miss satellites in their g o. stationary orbits. this particular asteroid comes close to the earth every 4 years. with the diameter of several kilometers. it's big enough to be seen with radar telescopes. an impact with the earth would cause a global catastrophe. according to new calculations, however, the risk of an impact is low for the next 200 years. unfortunately,

telescopes based on earth cannot see asteroids coming from the direction of the sun . the asteroid that exploded over the russian city and shelley evans, in 2013, came from this direction. it was only 20 meters across, but it released 30 times more energy than the atomic bomb dropped on hiroshima 1500 people were injured and almost 400 buildings damaged. and such unexpected impacts are possible at any time. now, back in time, could an asteroid. the reason dawn, as those went extinct, we hellions 100, just came from the university of bon. yeah. for a long time in the 20th century, it was believed that the mass extinction was due to volcanic eruptions and new as they still do today. that what is now india so intensely kind of activity over

a long time. the impact on the environment may have included ocean justification, which in turn led to a collapse of ecosystems over a period lasting several 100000 years done analysis. but later in the 20th century, scientists on growing evidence of an asteroid impact in modern day, mexico and timelines that impact correlates exactly with the mass extinction. more recent research has indicated what massive consequences it had since in armies. and does that probably blocked out the sun for many years? and research has also reveal deposits of iridium and bro mean around the world dating to precisely that period of time. and the extremely high concentration of these isotopes means they must have been brought to earth by an asteroid. one, yes. so that's why we now believe that while not the soul factor,

the asteroid impact was at least the primary reason for the mass extinction. that's not what makes the end of the cretaceous period. so special ed is that it was also a mass extinction event. the asteroid impact caused the death of a very large number of organisms in a very brief periodic leadings, the extinction of those species of a most mass extinction in our planet. history take place over long periods of time and hundreds of thousands of years when not long in geological terms, though it is for us. of course, you don't tend to notice changes happening around you. it's very possible and there are strong indications that we're currently living in a mass extinction event given the high number of species disappearing within just a few generations. if i was what is read, why do you have a science question? you'd like us to send it to us as the video text or voice mail. if we feature it on

the show, you'll get a little surprise from us as a thank you. have on the moon . fascinating stories head to our website, d, w dot com slash signs or check us out on twitter. health organization full cars. that within the next 10 years, 6 out of every 10 people will live in assisting. the population density is based on the number of residents per kilometer squared african and asian cities to have the highest level. the trend is only said to accelerate, even in germany. in the city of munich, they've come up with a creative solution. in the german city of munich finding land to build on is like winning the lottery. and so architect oliver,

whom has specialized in the opposite direction and consolidation has just finished renovating this building and expanding its antic bond. this is where the stairwell windows used to be and whenever you looked out and you saw the courtyard, the garage is on an ugly rather de la, dated ruth told me, especially in a city like munich. and we think that every area which can be reasonably used should be developed in the architect uncapped potential here. his idea was to use the court yard for residential building together with his colleague, alexander how looked for optimal utilization of the 130 square meter space. ah. busy the

university of dam stance architecture. professor caston oil a month research his the development of urban spaces after all, currently ceiling off about 70 hector's every day of the year for new building land, which roughly corresponds to $120.00 soccer fields and needed talk noise because noisy course this poses any logical problem using our natural land in such a way, constantly depleting it, it will never recover from it. we need to turn it of the getting more out of the land which is already being used is much better. logically, this is what we need to be doing. the collusion extreme new vendor schema. oliver home is a fan of such urban consolidations. one of his favorite examples, munich, architect, florian not le, creating 100 new apartments above a parking lot. this is how much just before

a parking lot between an outdoor pool and just support failed. and today the finished construction on stilts was calls popped underneath. to me, i can speak to me, this kind of deal use of space is suitable for any kind of housing. and we're not talking about the outskirts here. and then we're right in the middle of an established neighborhood. voice with housing built in the $900.00 thirties and it's developed ever since. and now i only want to compliment it shows us another urban consolidation project. an unused gap between buildings only about 3 and a half meters wide. for a long time, something like this was not considered useful space. now, a new building in the adjacent lot to use the gap for balconies. you put in john, a different dog interested in the potential. and now german cities is so great because they're not as dentures. we think, for example, vienna or copenhagen get by with population densities in the range of 10212000

inhabitants per square kilometer munich. the densest city in germany is about 50 percent less than that. and we have half the density in the bank with all of whom. and his building projects about the carriages in the courtyard. his client has since usually asked about the plans. they must also meet the strict regulations of the munich building. also we were told we have to build at least full garage isn't anything more is fine on this one. but if we wanted to use it as free space, well, we wouldn't be allowed to do something like that. definitely this miss muffin. and there are other problems. the driveway is narrow and there's not much room in the courtyard where it could a crane be set up and how to get all the necessary machines, the materials here in the 1st place. but the architect found solutions, a specialized small crane that fits through the narrow courtyard entrance. winful

did. and the wooden rules were adapted to the dimensions of the driveway while being pre made in a carpentry work shop. in the 8 months of construction, the courtyard with the carriages has been transformed into a unique residential building in the blocking basket district in the house of munich. today, oliver william has been invited for the 1st time to a private viewing at the home of the owners. katia and lots and we wanted to show you our house now. yeah, i'm excited to see how it turned out. come on, let's look. where do we start? look right here. even though it's a small space, there's no claustrophobic feeling so much green actually. you could even think you were in the countryside. yes, you think you're in the forest and instead of a dark courtyard building light now streams in through the patios,

even into the stairwell. the skyline here is nice. yeah, it's great. at 1st i thought i should be able to open it, but it doesn't bother me anymore. together they've created new housing through the smart use of space. and this right in the middle of munich, the world's population continues to grow. the demand for food and resources is increasing to grains or especially versatile. it's also food for both animals and humans. they can also be used as a raw material for bio fuel. but cultivating crops is no easy task. climate change and pests are a major threat. for one scientist, so the war on grain labels is one on the way one of my harvest crops, they don't just collect grain,

but fountains of insect to worse comes to the worst. they will include grain, we, those love ate them just heat the grain. the secretions can also cause mold, making the store grain unfit for human or animal consumption. to prevent that down more, it says, taking part in research projects. to day 2, scientists have brought a prototype early warning system for pests countries. a struggle to get up there. the animal said, producer in the researches are planning to bug the bugs. they want to find out if anything's a foot in the $450.00 tons of barley here with special microphones. as it is aware of this, you been able us to hear the sounds coming from the grain from the insects inside the grain. they produced a rustling noise as they move around and eat spending this big day. they trample about and chump their foods. shots. we gather this sound with this metal cheap

medium. it isn't the title of them. we don't just have a little microphone which records the sounds, and it's the sanity of the we have this big 3 meter long, she which collect sounds and the kind of amplifier. but it does more than that. the so called beetle sound tube is also an insect tramp here, less and in the perforate sions in the tube there. so that when the insects move through the grain, they fall through these homes into the chain under court in a container, which we're about to insert to on. and we hear them very clearly them because any and that can that makes a dreadful noise at home mode. it is home made. he used to be a coco shake. coastal off the microphone is the center piece of the sound tube. i'm just absurd. this is a very sensitive microphone which can pick up quiet insect sounds particularly well . it's not the kind of microphone you used to record. singing is pretty specialized

on the details of the research as attached the traps and the microphone to a rope and lower it down into the tube. and then last but not least added kind of nest for harmless insects though, what that does, the whole thing behave. container beneficial insects. when we find pests in the grain, we can stand in the beneficial ones. if we identify the age and said that they didn't have to go the whole way from the surface of the pile into the grain, we make things a bit easier for them and we transport them via the tube. and the strips of paper that to help the insects climb from the container onto the wall that the chief direct. so i clicked on con, they get out through the whole they exit by the hose. beneficial insect a tiny was about the size of a grain of rice. they lay their eggs in the wheels loving killing them before they

compute pate tiny stones ended in food because the grain is cleaned before it's processed for organic farmers like nicholas cozen bag, being able to detect weevils at an early stage and control them organically. is a huge step forward is especially the what's the harm i forget who i can with great having something like this is an early warning system. most farmers have problems with weevils, even if they say they don't want. we've taken a very upfront approach because it is a problem by the last year in particular, because of the high temperatures we had in the winter months. without cold periods, the books have even more opportunity to reproduce. f i'm will be the last year and that became one of the 1st to join the project in the german state of brandenburg back then. this grain silo is full but not just with grain,

pests and bread explosively within the crop. the sound tube, which is still hanging inside and will also be used again this year, raised the alarm immediately by the microphones and related computer program. the research is saved last year, sound recordings. this is what the insect sounded like. this is off now. this is a recording from last year. the, the, the little lava is sitting in the grain, eating the inside of the grain colonel piece my pages. and when it's eaten enough and it enters the pupil stage. and then at some point, it emerges from the grain as an adult weaver. most i'm calling with global warming means the grain wheedle and similar pests are a growing problem. but a possible solution appears to be on its way. there are plans to market the sound tube as soon as the test phase is over.

that wraps up this edition of tomorrow today. join us again next week for more exciting stories from science and technology. until then they can keep asking questions whose the, whose the, whose the, the

the, the the the the far out in the northeast corner in germany, only on the open sea. a day trip is nice, but it's better to stay 2 or 3 days on the island. that makes a real difference is the ideal place to slow down and relax. check in

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