how does a virus spread. why do we panic and when we'll. just 3 of the topics covered and we couldn't read your blog. if you would like any information on the crawl of virus or any other science topic you should really check out our podcast you can get it wherever you can get your pod cast you can also find us at g.w. dot com. science. there's a tendency to think that a bigger is better consider diamonds houses cars but it's often the little things that really makes a difference some so small you can't even see them from nanotechnology to micro

homes and amateur traders they're all making a splash and demonstrating that size is actually relative when small is big that's our topic today welcome to made want to get jones in berlin it's good to have you with us now back in grammar school i had a teacher who wasn't actually told he was a powerhouse used to say i'm not small i'm concentrated his lessons were very intense and successful even i had excellent grades in math and physics small and concentrated could also apply to nano particles they are found in lots of modern everyday products to make things water repellent for example but what do we actually know about those super tiny nano particles and their interplay with our lives many other schmidt reports. this is sung to with not a part of who gets. 1000

nanotechnology have to do with me. i was trying to polish containing nano particles it was supposed to make the polish absorb into the shoe better it didn't help them much but it seems there is something new for me after all in the wonderful world of minuscule artificial particles. i have a broken model of which has to be replaced with a dental implant until now there was a risk for the bacteria would attack the implant and it would have to come out again but the nano coaching of silver can protect against bacteria in the future. critical schneider from german company arias has developed a coating for dental implants. technical development takes a few years if it happens at all. and then there's the certification process to prove the whole thing is safe. that it often takes years at least

a decade. because the hurdles are high. they want to avoid putting the consumer at risk in any way and that's a big challenge for a small company like ours. the stringent demands are also slowing innovation. you can see 1st and us many whenever i contact the medical equipment makers 9 out of 10 of them say they don't want to pursue it because the regulations have become stricter or they have become too vague leaving no planning certainty. that none of articles can also be found in many foods such as chewing gum baking powder where they make the whites appear even brighter it's basically just a coloring effect. critics are worried about the use of tiny particles in food though. we know that certain nanomaterials cause inflammatory reactions in

the gastrointestinal tract that's a precursor to cancer and the kind of thing we must prevent so why is it that something like that gets a license when it can cause inflammatory reactions. the reasoning was there is a labeling requirement for nanomaterials in food but you won't see any foods labeled contains nano products that's because we're still arguing with the various industry associations about whether it still has to be declared as such because they say they haven't used it as a nanomaterial but there are all was some nano components in the product itself. ok honestly i don't really see through doing. nanotechnology is on the chance of territory rich in potential. i would like it either but then not everything that's useful is also edible so that

shouldn't be a criterion when deciding whether new technology is worthwhile and when it comes to nanotechnology there's still so much to explore in recent decades scientists and engineers have learned to make and manipulate nano particles and nano structures and deploy them and products and processes the range of applications is enormous and expanding fast see for yourself. small smaller smallest nanotechnology. a human head has a diameter of 50009 or meters one nanometer is just 150000 of the diameter of a hair. here's another way to visualize it one nanometer is 2 a meter what a hazelnut is to earth. nanostructures how fascinated scientists for decades now they are even able to make some of those structures themselves they can manipulate matter at the atomic and molecular level so that the matter takes on new

properties. industry has discovered the virtues of various nano particles many sunscreens now contain ones that block u.v. radiation. silicon nano particles are used in smart coatings that make fabrics water repellent that's a novel way to waterproof clothes and upholstery. super sticky glue tennis balls but keep their balance and unbelievably tiny computer chips all things to nanotechnology. it's become big business sales of nanotechnology have been growing at an ever faster rate. one estimate put the global market value in 2020 at 63000000000 euros. the nano technology is said to revolutionize many sectors in the field of medicine research

is intense and wide ranging. it's also contributing to environmental and climate protection. nano scientists even working on self healing materials imagine a crack in an airplane wing that repairs itself with nano particles going where they're needed for now that still pie in the sky but perhaps for not much long. nanotechnology is really taking off. now severe lack of space has led to a shortage of fordable housing in many big cities try finding a flat in berlin a nightmare as a result some people are setting their sights on something smaller a tiny house unconventional lodgings are ready popular with holiday makers and 2018 air b.n. b. so a roughly 125 percent increase in worldwide bookings over the previous year the figure for barnes was 110 percent and shepherd's hut came in at 93 percent plenty of people are also looking to downsize permanently so we met

a successful tiny house builder in germany and an architect in hong kong says small homes are key to overcoming homelessness. anika is a product design and has built herself the house of the tree. live in the tiny house i live in a tiny house. i used to build but she's quite different now when i left the film industry and travels for a while everything i needed was in my backpack went to a tiny house is a lot like not everything you need fits into one room and there are lots of places to start stuff away from everything else multi-functional. she books for stefan. he started building tiny houses 5 years ago and now he's one of the biggest manufacturers in germany. he builds foresee

a year none of them larger than $25.00 square meet his. first saw them in canada. i spent some time there and saw how they were building micro houses though they weren't mobile homes on wheels the idea really fascinated me. from. then the trend reached europe from north america we picked up on it relatively quickly and decided to build a prototype and see how it goes down off more important to us mine also. this starting price is 45000 euros for a house like this some customers want to live in this full time 'd others just for holidays by the way you can't cram much stuff in here. many minutes many people have come to appreciate minimalism downsizing lean living we know that because we see lots of people here who think that way. if your 1st time that if you're living

in a small space is just one aspect of minimalism more generally it's about reducing your c o 2 footprint oh i don't know i depart from to my minimalist most so choosing to live in 20 square metres rather than 60 square metres could be part of that secret let me type of woman behind so no further north runs a credit meter in hong kong for example 20 square means his is quite stand it and still very expensive lots of people live at very close quarters they can't afford more space james lewis an architect based in hong kong has designed micro homes in segments of concrete water pipes he calls them oh parts so i came up with the idea when on one day i was on my construction sites and i saw some of these very large concrete water pipes being laid into the ground and i walks into one of them and

they were big enough for me to go inside and suddenly i felt that this source instant architecture this is like an instant shelter which with a bit of design and a bit of creativity could be quickly made into a small house. he says these low cost units can help eradicate homelessness and ease the shortage of affordable housing $120.00 units are set to be built in hong kong this year more are to go up in canada. losses the world needs to rethink housing as the population source. homes will have to get smaller and. the cities asked so. so expensive to live in space it's so tough to get and so many people are chasing after that space so that you know wait the architecture we build is no longer so affordable for people so maybe this idea will become necessary in some form in every urbanized area in the world because we realize that

we cannot always just build iconic and expensive projects for a symbol of our city we also need to really take care of people otherwise the people will be the exotica. hung kung is only one of many cities where housing is very expensive and in short supply. stephan dyckman says the market for tiny houses is going to be here to. tell but if i for i think people have become more flexible nowadays they're not so bound just staying in one place for the computer. well that's another reason for choosing the chinese house or the i'm about this for the entire house dyckman plans to open a tiny house hotel once the pandemic is over that is the pint sized units are ready to go each one is different. i think of folk it doesn't need to be convinced she's already a fan and says her tiny house gives her everything she needs. it should

be easy to keep clean moving on to the world of stock markets more and more amateur investors are trying their luck these days and they're even sending some stock prices soaring but in this very risky business the stakes can be high here's my colleague to delay new with the lowdown on day trading. the beating heart of germany's financial industry the frankfurt stock exchange but it's one word down people used to. trading has moved from stock exchange floors like these to our phones and laptops deals are done while waiting for a friend or for a coffee and many people like you and me even my mom's doing it amateur investors have flocked to stock markets like never before since the crown of iris endemic began well it has devastated many people's lives and jobs other people have found themselves with extra time and money during lockdowns and this record breaking rally we've seen in global markets has made many people already very rich. as and

p. 500 in the u.s. was up 16 percent and 2020 but that's nothing compared to this day trader favor at tesla more than 700 percent i've been covering stocks as a journalist for years but i'm ready to get off the sidelines and try my hand at being a pandemic to trader. one to 2 platform when a lot of people think about trading stocks their mind conjures up a scene like this. and while you still can trade stocks by calling up a broker treating has increasingly gone digital setting up an account as easy as downloading an app there are dozens of free or low fi options out there to choose from step to choose your stock. die hard day traders make hundreds of transactions every day others like me have day jobs and only so much time for writing market

swings so i have to make my investments count. oliver wrote as a trader here in frankfurt he says we should all be trading stocks because ultra low interest rates mean more traditional investments like savings accounts no longer pay. there's no way really a turn or 2 of to stock investment when you look at the interest rates they are so low it's not possible to save money on the account or somewhere else so this is just without an eternity of therefore even the private people the private investor retail investors very interested in stocks even in germany which is not very popular on the on the stock side today is the 1st day of my experiment as a pandemic day trader what advice do you have for me as the new the from a professional like you. are 1st of all if you go to the stock exchange you have to be very disciplined that's very important because you need to think about where you

want to invest why you want to invest and then you have to be disciplined by saying this is where i'm going.