to worry about this sounds of power, inspiring story about survival of the home and go get the tennis. i was the only one who lives in nazi germany. watch now on youtube dw documentary. the out of the 225 witness of the nobel prize in physics just fine. so women in fact, women are under represented generally in the subject in western countries. in particular, there were phone q, a 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 goals high school in southern gemini, a few hours earlier, final preparations are on the way. so the experiments, it's a joint projects 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's 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 yeah, with the emphasis on practical work makes the learning relaxed, almost effortless in the bottom line is on the whether the noun approved a power shoot it's really swelling, so i'm very excited now. once i find, i found it really exciting the topic. i'm what it looks like help that and what

will happen to the pounds when they're up that the shooting been posted. i've always been interested in once he looks like up that what the us looks like from above to me it's just, it's kind of fascinating me. i think going to move top from the everything's assembled full, measuring devices that are onboard the gps track of 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 and with more practical experiences on my list to them please respond customer. what we've learned most is how much fun it can be off in the gums, the gums, noisy other devices in a really curious way. what's interesting, so see and then approach the physics that we need for that. is it the football and kind of a kid. we're not doing what keeps science, is we doing an educational project?

and at the same time we're learning about the composition of all right, ms. vega. i'm how oh so how unique this planet is that we're living on right now? and then regarding the university students have helped supervise the people's as a full lead physics is so relevant to everyday life, out of talk also in situations. but she 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. eventually, every moment at the launch, it's clear that this is all about physics. the, the pressure is on 5000 liters of helium. and the whole school watch countdown times 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 gloves. i mean, those things 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 did it guys the victorious ending? what's about the house, the most my life death is next up in small the highlights, analyzing the camera footage the

the that, that's also cool. really cold desktop the radiation measuring device has had enough because too much radiation. mm hm. that's what was be paying. yeah, yes, it reached its daily maximum dose from the desk. 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. and the coming out of them, i'd say we achieved what we wanted to achieve as the maintenance shop. a few weeks later, a debrief, obtained altitude surgery, 4602 meters. a 2 and a half hour journey into the stratosphere and the high speed return. when in

missile some of the measurements what well others less. so that's just how it's used in physics. we're still working to save a couple of the data sets, and today we evaluated what we already have. they're going to ask about the tool and 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 my students have been women. and yet to study by the european space agency reveals that women of fall back to see to, to space travels a man they have more efficient metabolisms and consume q or resources including space schools and mental l, v e from mexico has sent us an interesting question about that topic. how is it

possible for astronauts to do space books are working outside a station or vehicle in space is by it's difficult and dangerous. it's extremely cold where the i assess little bits and there's no human beings with terry shelf to just 30 seconds out. that astronauts can only survive in space wearing special seats, which are effectively like small spaceships. 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, capital coated with a menu. the suits protect against the vacuum as the cold, as well as mike cray, meteor rights and solar radiation. a special underwear with tubes through which cool water flies prevents the asper notes from overheating,

chewing best strenuous work as to trains of space missions in special swimming pools like type is that more than 100 killer heavy suit substituted with whites which allow them to flight corresponding to the conditions in the international space station is a waiting list environments. this is because it will bits the so fast that centrifugal force and 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 caused them to drift away. that the up guess that i still have already lost

they wouldn't be able to return on that road. that's why oh extra notes that tended to the spacecraft at old streams. in 1994 nessa tested special get backpacks. these with develop submissions were asked to notes, 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 deposition and then return to the ship the during 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 astronauts used to move around. when they change position, at least $110.00, this ways be attached to long distance is the ask, you know,

so, so tulsa on the right bus, take home to the deployment science special platforms for that fee to help them securely in place. we low phones during 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 to come on just off when it comes to choosing an apprenticeship in germany goes typically up to train is assistance in the business or 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 a step and 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

cluster of provide drinking was the treatment will to self in existence, not so positive a job. and so we might even have a drinking or to shortage in the future. so how can we use raymond wheeler, an old us at school? i'm practically to one. the construction site is quite a few 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. 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. so that's drinking more to storage, right?

no, that's the buffer time keeps different. yeah. a, so i plan to go talk grades at high school. i'm finished and fall off. she's chosen this male dominated profession because she wants to make a difference. ready so i'm gonna to, to even do something for the local environment and that is if you guys to, that's the right attitude, right? if you can do something yourself on sites, don't expect of those to do it for you. the tech is always developing and this is the next generation. so it's very important. it's up to you and 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 been fascinated by the subject ever since spend in session and so far will be that right now, construction sites and those being supplied only with heat generated from the ground 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 up. but of course it makes you really have pictures of the one part. the stuff about parents is that cadet makes a proud is that door to end the path she's chosen? well, the is to be less supportive with their thoughts, much of a select my, maybe i'll become a mazda trades pass and spoke to a degree of friends gets it. i'm gonna find the most of my friends of 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 bruce as well to the point where we have no option but to can. now, if i've done to is chosen it professions 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 in a virus comes out make, make many of us aware of just what can collect to not endure and keeping in those

spaces. wells and collectors is still vital. an uh, quality measurement campaign as an elementary school in switzerland is a way to go yet no into team from the school of engineering and architecture in sleep . what are in storing senses so potentially has a just a pollutant space 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 will 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 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 rims . they didn't pull the ventilated ones. the pandemic put at quality firmly on the agenda. i'll send you definitely do that. can you send to them into at quality was suddenly a token point student javion, unfortunate base. since then, people have phone and 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 re don't,

is often also present a radioactive gas submitted from the at the resulting mixed. you can be bad for our house, invisible and potentially responsible for diseases such as asthma and cancer in the long term genetic go. yet pen no 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 for such as to get the, the message was clear, visualize in the feasible make in durham are visible. when i go to the ball is it was to me all into twain buttons, public transportation. i need to know is it an i was safe or not? so i need to see that visible at the conference. the indoor air quality was also measured, encouraging room temperature, humidity, and c o 2 levels. although not toxic and high concentrations,

c o 2 can impact wellbeing, and the gas is also an indicator 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 and then those are using that to set standards in mind. there is a component of the responsibility of the state of decision makers. you said regulation sidney loudly as we have a right to clean water. we also have a right to breathe clean and we might not, and we should not compromise on that. right. and kind of the centrally pure thought,

i'd like to mention 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, by a mechanical ventilation systems. these need to be properly adjusted, but that's not always the case as the study for what reveals to what was it going out of 11 schools studied almost all ventilation system that have very different values, even though they have the same purpose from namely to ventilate classrooms. of similar sizes with similar numbers of students in the fall semester. on top of this even well maintained ventilation systems make the very dry, especially in winter an ideal environment is a virus that sees what over how's you succeed. you have to find the right balance between ventilation and moisture recovery to limits, infections,

especially viral infections. to this i fix you on the motion and if you have windows 10, 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 pays 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

clauses. 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 content within the museum was this damages caused by the depletion of substances that dissolved out of the gloss resulting in these micro credit was curious to know some flaws and others. interesting, because i said, what's challenging is that the home full substances are in the air of the display cases. they come from a t sips, for example, or textile coverage. now, scientists from solange university of come up with a simple way of killing the pollutants by using salt solutions. these are made up of water and various soaks like potassium carbonate or potash plants and stuff. because i think this as will depend on this, 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

a c. take gnostic 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 folders represents the many show cases. 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 and the tolls rises. rate in the buffalo with the salt solution, flew in the buffer containing time we spend, it's time to wait a few minutes. let's just take, 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 here in the example below, you can see that the casting is still in yeah, leaving it to damage the exhibits. so how does it block the polluting gas flows

into the many 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 developed and the liquid no longer poses a risk. the next step is to place the solar solutions in display cases that are over 60 museums in the festa. co book is one of those museums, keen to put the soap 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, fluoride,

that smells effective against pollutants such as a seated cafe. though formaldehyde no has not been massaged, but it is against damage caused by moisture in the display case. at which kite had the fish 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 fall apart to induct of glass. also, i'm not fit to avoid this. the humidity and the display cases must stay at a fixed level. something the magnesium co ride had previously insured. is very human death flows into the display case in somebody. it reaches the magnesium fluoride, salt solutions through 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 if operate until the humidity returns to 33 percent. a simple and effective regulation system now have a 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 is harmless, and also ensure 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. a. hi nick leave is now replacing the museums, magnesium, chloride solutions, with new ones made from potassium carbonate. he's keen to find out what the optimum

humidity level in the display case, a really remain stable at the moment. humidity is that 69 percent decides as it's over the next 6 weeks, the potassium carbonate should reduce the relative humidity to 43 percent and connected to 4 to 6 weeks later. the humidity in the showcase. uh is it a constant? 42 percent dust and that's a super result. the way more than happy with it doesn't get any but has a nice to ensure that the display case tricia is preserved as well as possible. $38.00 museums at gemini, and $24.00 across europe. i'm the us and now testing the sold solutions, the sunset from us this time on dw science. i. thanks for joining us and see you again soon on tomorrow today. state curious

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news at what happened to me was right. i just didn't know where i could share with who is going to believe me. this is greg was sterilized against her will. in canada, as with thousands of indigenous women from the 1970s to present a global membrane. in 1st few minutes on d w. they carmela di family gave the world the secrets

of shown discovery as helped in the fights against infectious diseases comes to therapy and all the time. the really like the non. 1 are the t i'm story queued by camel, none of the in 75 minutes on d w the this shadows these are costs and video shed lights on the donkey street. devastating colonial har is infected by germany across and he employed the scorched post, tactic farms and destroyed lights. what is the legacy of this wide spread races, depression, today? history. we need to talk about here, the stories,

shadows of german colonialism. the dream of revolution. in 1979 ancient dictates as the most uh, was closed, that changed my life. the people hoped for a sara society. i imagine we would change the world. tens of thousands of messages from all over the world wanted to help reconstruct the country. this mission became the dream. it was simply a spirit of optimism where we encouraged each other, and so many things were suddenly imaginable. that there are the most efficient and making a dream of revolution. thoughts, july 20th d, w d

live faces. this is the w news, live from bell in the us supreme court rules that donald trump is partially immune from prosecution. the quote says former presidents have absolute immunity for official acts potentially offending a case, but alleged from tried to subvert the 2020 presidential election. also coming out front this fall right inches closer to power. national riley leda marine depend of his votes, has to give her policy a governing majority officer it strong, showing in the 1st round of snap elections, of the policies on that, weighing their options on how best to prevent the fall right from coming to power. and.