day is the largest we need to talk about here, the stories, shadows of german colonialism. the out of the 225 witness of the nobel prize in physics just fine. so women in fact, women under represented generally in the subject in western countries in particular that were found fewer female physics students and 3, such as the male. how do you get goals interested in physics? perhaps with an exciting experiment. the welcome to dw science shaped the . the object that's crushing down here comes directly from the stresses fair. it's

the results of months of preparation by students that this old goes high school in southern gemini, a few hours earlier. the final preparations are on the way. so the experiments, it's a joint project between the school and cosmo is university of education. the aim is to launch a high altitude weather balloon with a measuring crew into the stratosphere. everything is being planned and built here and includes some age appropriate propes. as we've started the chocolate marshmallow on that with super glue so that we can see how much it expands in the, with the emphasis on practical work makes the learning relaxed, almost effortless enough later on in his own a weather balloon. probe a power shoot. it's really swelling, so i'm very excited now. tense, i toss fund. i found it really exciting the topic. i'm what's it looks like up that what will happen to the pounds when they're out there and how much are you going to

say? i've always been interested in once it looks like up that what the us looks like from above to me, it's just, it kind of fascinated me. i think going to move this kind of top. everything's assembled full, measuring devices there on board, the gps track, a working time for a final check for insurance reasons, the pro mist way, no more than 2 kilos. the experiment has a further purpose beyond the obvious how to get goals interested in physics and how to make teacher training and science subjects interesting with more practical experiences. and my mom that can play for stuff, that's what we've learned most is how much fun it can be off in the gums. it comes no idea other devices in a really curious way. what's interesting to us. yeah. and then approach the physics that we need for that is it the math is inductive. awesome. and kind of a kid we're not doing well, keeps science, is we doing an educational project? and at the same time we're learning about the composition of all right, ms. vega and perhaps also how unique this plan it is that we're living on right now

. and then regarding the university students have helped supervise the people's fault and the physics is so relevant to everyday life out of time. also in situations which you don't yet know, perhaps don't even think about the thing spot in the, in the exciting thing about physics is that many people don't realize that it surrounds us. had virtually every moment at the launch. it's clear that this is all about physics. the pressure is on 5000 liters of helium. and the whole school watch countdown the time the balloon rises rapidly. soon it's no longer visible. and then people, students, teachers, parents,

the chase is own land very exactly about that. and then the gps transmit to temporarily fails, is the pro, last time in newton's in the balloon is full cost to land in a nearby town with this noise. that's all the blueness mandate that they're in the tree at the top left. the slate. did it guys the victoria sending us about the house, the most, my life that is next a bit small. the highlights, analyzing the camera footage. the

how does that sound cool? really cold desktop the radiation measuring device has had enough because too much radiation. mm hm. that's what was be paying now. yes, it reached its daily maximum. doug's just come with us. i find that in physics you just discover things that i don't think you really teach it. you experience it yourself and that's what i think we did today on the i'd say we achieved what we wanted to achieve as the pollutant maintenance shop. a few weeks later, a debrief obtained altitude. 34602 meters, a 2 and a half hour journey into the stratosphere and the high speed return. when in missile some of the measurements what 12 others less. so that's just how it is in physics.

we're still working to save a couple of the data sets in today. we evaluated what we already have a minute. let's do that. we have on this one, we were a great, great, and had fun. we were interested in the solve the tasks we were given really well set time with good news, which just shows that education can be simple when it's fun. face trouble is another male dominated environment. to date, just 12 percent of students have been women. and yet to study by the european space agency reveals that women a fall back to suited to space travels and map they have more efficient metabolisms and consume fewer resources. including space pools on demand o l v e from mexico has sent us an interesting question about that topic. how is it possible for us to know what to do space books are

working outside of station or via cold in space is by difficult and dangerous. it's extremely cold where the i ss obits and there's no human beings would perish after just 30 seconds out. that astronauts can only survive in space wearing special seats, which are effectively like small space ships. a rock sank, supplies them with add to breeze, and also removes exiled carbon dioxide. the seats have several layers, they need to be gas tight and with stunned excess pressure. the outlet is made of fire retardant, catalog coated with the menu. the suits protect against the vacuum as the cold, as well as mike cream. meteor rights and solar radiation special underway would choose to which cool water flies prevents the aspirin notes from overheating during best strenuous work as to trains of space missions in special swimming

like type is that more than 100 killer heavy suit substituted with whites which allow them to select corresponding to the conditions in the international space station is a waiting list environment. this is because it group, it's the so fast that centrifugal force of gravity balance each other around. it travels 7 kilometers per 2nd, the astronauts and moving at the same speed. but they didn't notice it. physically speaking, outside the station there in their own little bit. even a tiny kush lives meant to come to this old bitch and cause them to drift away that the up guess that i still have already lost the or they wouldn't be able to return on that road. that's why oh extra notes that tended to the

spacecraft at old dreams. in 1984 nessa tested special get backpacks. these with develop submissions where astronauts have to move far away from the spaceship. for example, to cap just have to lines the in an emergency. astronauts can ignite this thrust as to stabilize that position and then return to the ship, the cheering extra, the hit, killer activities on the i assess astronauts as a kid with 2 testers. these lines of attached to poles and candles, which the astronaut seems to move around when they change position, at least 110th miss ways be attached to long distance is the ask, you know, so, so close on the right bus, take home to the deployment sites,

special platforms for that fee to help them securely in place. we love answering your questions, do you have one it so you send it to us as a video, text or voice message. and if we don't switch on the show, we'll send you a little surprised as a thank you. so come on. just ask when it comes to choosing an apprenticeship in germany goes typically up to train is assistance in the business of medical sexes. boys tend more towards mca tronics will become electricians. career choices are still very much shaped by stereotypes, but it doesn't have to be the way hey, so plans prefers action instead of tools and doesn't want to go to university right now. she belongs to the generation campaigning for climate protection, but that's not passing. she wants to learn practical skills to protect the climate . i think for us to also provide some drinking water treatment to softening systems,

not so positive our job. and so we might even have a drinking or to shortage in the future. so how can we use raymond wheeler and, well, that's at school. i'm practically to on the construction site. there's plenty of you and there's definitely something to be gained from taking to the streets. i'm all for that, but i'm the kind of person who prefers to create solutions with my other times. and each of us today, the 18 year old is switching ventilation pipes. so far her favorite aspect to the what because being in customer service, she enjoys educating people, advising them on climate friendly technologies. this is mine, i'm training to be a fun mechanics. assignment tree heating and air conditioning is that's the full name on her instruct to boost and you see shows us the main heating we get to that with the latest technology. does that stinking with a storage? right? no, that's the buffer time kits. different. yeah. a foot plan to go talk grades at high

school, finished and fall off. she's chosen this male dominated profession because she wants to make a difference. ready so i'm on to, to even do something to the local environment and that is if the guy, that's the right attitude to the right. if you can do something yourself on the sites, don't expect others to do it for, you know, the tech is always developing and this is the next generation. so it's very important because i feel this is every her commitment to the climate has grown. in the 11th grade, she wrote the physics paper on the side table text and fell in love with renewable images. she's being fascinated by the subject of a sense, spending session in those 4 would be that right now, construction site, since those being supplied only with heat generated from the ground out and does a young person, it's so amazing to see that you can get heat energy from sources other than fossil fuels to come to but it makes you really have pictures of the month parts and stuff

about parents, those that cadet makes a proud of that door to end the path. she's chosen well the is to be less supportive with her. that's much of a less my, maybe i'll become a mazda trades pass and spoke to a degree of friends gets it. i'm going to find the most of my friends are studying, but they're actually quite positive about it too. they usually say, okay, i wouldn't want to do the job myself, but we do need people who do so esna's says both as well to the point where we have no option but to can. now, if i've done to chosen a profession to which she can make the world's best to place the ventilation systems like those the 8th of planned works on becoming increasingly important. the career and a virus pandemic made many of us aware of just what can collect to not endure and keeping in those spaces wells and selected is still vital.

an ad quality measurement campaign as an elementary school in switzerland is a way to go, you know, into team from the school of engineering and architecture in sleep. what are in storing senses for potentially hazardous pollutants, both inside and outside. the data collected from around 25 switched schools shows a clear problem with the quality of the this is the case in many buildings where people spend time together was all to be sick. we now know that the variety of pollutants is found in indo ac and have a significant effect on our house. the ones that pollutants has already clearly demonstrated

this corona virus. it wasn't so long ago that students were sitting in school classrooms with the tools and windows, and several studies showed that there were 5 few infections in well ventilated rooms that employee ventilated. once the pandemic put at quality firmly on the agenda, i'll send you definitely the the can you send through that into at quality was suddenly a token point student javion. unfortunately, since then, people who are phoning back into old habits and the lessons learned from cove it. and now having little effect. wonder if it was all the ventilation behavior is now knowledge the back to us. it was before the pandemic. and yet people typically spend 80 to 90 percent of their lives in those schools can house a high level of pollutants in addition to viruses, c o 2 often accumulates and then and then with fine dust mode, schools and different chemicals in many pumps of dwelt radon is often also present or radioactive gas submitted from the at the resulting mix. you can be bad for our

house, invisible and potentially responsible for diseases such as asthma and kemp. sit in the long term to let it go yet know, sees an urgent need for action. in 2023, the arrow biologist attended the w. h chose 1st indoor at quality conference in them. switzerland. it same was to raise awareness and bring decision makers and massages together. that message was clear. visualize in the visa make in durham are visible. when i go to the ball, it was to me all into twain button, subject consultation. i need to know. is it an i was safe or not? so i need to see that visible at the conference. the indoor at quality was also measured encouraging room temperature, humidity, and c o 2 levels. although not toxic can high concentrations, c o 2 can impact wellbeing. and the gas is also an indicate of of pathogens. if it

exceeds a certain amount, an infection becomes more likely as yet there a no binding limit of values for c o 2 or other pollutants. about the w h o is developing recommendations. and then decision makers, either at country or international that those are using them to set standards in mind. there is a complement of the responsibility of the state of decision makers. you said regulation sydney, loudly as we have a right to clean water. we also have a right to breeds clean and we might not, and we should not compromise on. that's right. and kind of the centrally pure thought i'd like to in every building, even if we,

we should be equipped with systems that accurately measure toxic public tips as well as c o 2 and which ideally automatically exchange yeah. for example, via and mechanical ventilation systems. these need to be properly adjusted, but that's not always the case as the study for what reveals to all that goes out of 11 schools, studied almost all ventilation system that have very different values, even though they have the same purpose named me to ventilate classrooms of similar sizes with similar numbers of students in on the fonts to me to on top of this even well maintained ventilation systems make the very dry, especially in winter, an ideal environment for virus that sees what over, how's your success. you have to find the right balance between ventilation and moisture recovery to limits, infections, especially viral infections, that there's nothing strong and not the motion. and if you have windows that can be

open, it's a good idea to add rooms regularly and extensively to the exhibits and museums that typically protected from environmental damage by being kept in display cases. but the air within these can itself types of risk. now reset to the testing out a surprisingly simple solution. the festa code book full access complex in bavaria, boasts of valuable glass collection, including unique's red glosses from the renee songs and precious cloths where from the 16th century the collections conservatives have done everything. they can to preserve these treasures, which it's most enough display of drinking glass contains fine. mike cracks is this clause is this cost is about

a 150 years old and it's being damaged by formaldehyde. this is, this is one of the main guesses that we have to contend within the museum wells. this damage is caused by the depletion of substances that dissolved out of the gloss resulting in these micro credit was curious to know some loss and other interesting because i said what's challenging is that the home full substances are in the arrows. the display cases, they come from a t sips, for example, or textile coverage. now, scientists from solange university have come up with a simple way of killing the pollutants by using salt solutions. these are made up of water and various thoughts like potassium carbonate, or potash. because i think this as will depend on is the salt solution, such as potassium carbonate to be placed discrete in display case in the should then absorb pollutants. so for a long period and protect the exhibits, acetic acid, gas is a pollutants that can damage museum exhibits. or if i please choose colleague,

want to show how potassium carbonates can render this homeless. the tube of all this represents the meaning showcase is the one on the right to contain means the potassium carbonate salt solution. the one on the left contains via as soon as the a c take, nasa gas is injected. the gas concentration in the book told us rises right. and the buffalo with the salt solution, flew in the bottle containing time. then it's time to wait a few minutes. but it's interesting, i'm sure you can see quite nicely here that within 2 minutes the potassium carbonate has taken most of the a c take acetate out of the demo victory in the example below, you can see that the casting is still in the yeah, leaving it to damage the exhibits. so how does it work? the polluting gas flows into the mini between the attractive forces and the water

molecules drew a large number of acetic acid molecules into the salt solution. the potassium carbonate mendez, many of them homeless through a chemical reaction. this leaves space in the salt solution for more as a home full gas, which continues to be attracted to some of the a c to acid molecules escape and turn into gas again. but then the drawing backend over time, the process comes down. then almost all of the home for gas is dissolved and the liquid and no longer poses the risk. the next step is to place the sol solutions in display cases that are over 60 museums in the festa. co book is one of those museums, keen to put the salt solutions to the test. the museum is a special case. for the past 2 years, it's been using a salt solution will be it's magnesium, co ride. that smells effective against pollutants such as a seated capital,

formaldehyde no has not been massaged, but it is against damage caused by moisture in the display case, at 1st kite had the face moist. it has the ability to draw all components out of the glass. if you don't do anything about it over time, the cracks will run through the entire loss and can cause it to for the pot to end of class, we'll send a method to avoid this. the humidity and the display cases must stay at a fixed level. something the magnesium co ride previously insured is very human death flows into the display case and some of it reaches the magnesium to ride salt solutions through the cracks. a large number of water molecules are solved from the yeah, into the salt solution. the add becomes dryer until this a constant humidity of 33 percent. if the air is very dry, winter moisture levels drop in the case, then many water molecules evaporate until the humidity with tons to 33 percent. a

simple and effective regulation system. now i am flush a lot of things. however, recent research has shown that 33 percent is actually false, too low, especially for unstable and sick class to. so we looked for other salts that could keep humidity at around 43 percent, and found potassium carbonate could do that. it's much better to sit gloves fewer best so. so potassium carbonate solution can rent a damaging gas as homeless and also insure constant humidity. this is important for many exhibits. the salt solution is also easy and inexpensive to produce, making it perfect for small museums with limited resources. the hi nick leave is now replacing the museums, magnesium fluoride solutions, with new ones made from potassium carbonate. he's cain just calling down with the optimum humidity level. in the display case,

a really remain stable at the moment. humidity is at 69 percent decides as it's over the next 6 weeks, the potassium carbonate should reduce the relative humidity to 43 percent connected to 4 to 6 weeks later. the humidity in the showcase. uh, is it a constant? 42 percent with us and that's the super result, the way more than happy with it doesn't get any but has a nice to ensure that the display case treasures are preserved as well as possible . 38 museums in germany and 24 across europe. and the us and now testing the sold solutions, the upset from us this time on dw science. i. thanks for joining us and see you again soon on tomorrow. today. state curious, the,

the, the

shift your guide to life and attention to you know, the latest online trend, navigate your way through the digital jungle global perspective. we'll see you guys and show you what's possible. really message to you in 15 minutes on the w eco for time saving indigenous, some additional plugs from extinction, jeanette to kyra key on those goals. these plans have such

a powerful effect that they can even fight to malaria. a success story full of the agents. the code for a few minutes on the w, the crises, every single connection mapped out shows that you can disagree. odyssey be on the board is what makes things the way they are mapped out. navigating a changing world, the now on youtube rugs, the environment, trends, technology companies, digitalization, stall, tops, new markets,

new media. the world is accelerating. sees the opportunity to try new things. take flights with b, w. 's business magazine made into many on d, w, a little guys. this is the 77 percent the platform for the issues page share idea you know, or this channel we're not afraid to pass and then it gets to talk to the young people clearly have the solution, the future of the 77 percent every weekend on dw the

this is dw, and who's coming to live from berlin. motors in france flocked to the far right supporters of the national rally celebrate their strong lead in the 1st round of snapped parliamentary elections. party leader marine the pen says president the collins centrist campus. white tell she's urging voters to give the national riley an absolute majority in next sunday's final run. also coming up parts of europe clean up after deadly sto. busy arms, scientists say it's another reminder of how climate change is making extreme weather more frequent and even more severe.