with the biggest composer of all time i constantly begin to imagine a world class one player singer willis on a musical journey of discovery. a world without a coven. this week. this is deja news and these are our top stories republicans in the united states a valid to push ahead with selecting a new supreme court justice to replace ruth bader ginsburg who died on friday president trump tweeted that he was judy bell and to carry out the task he was elected for democrats argued that the process should take place after this november's election. policing bellaver is have detained hundreds of people during

a women's march in the capital minutes wakely protest has become one of the largest anti-government actions since a disputed presidential election triggered on wrist in the eastern european country police have begun to round up female protesters in recent weeks. pro-democracy protesters have gathered in thailand to demand the prime minister's resignation and reforms to the monarchy tens of thousands have so far turned out for a weekend of rallies student led demonstrations are calling for democratic reforms and changes to laws against criticizing the time monica. this is datable the news from berlin follow us on twitter and instagram d w news is the handle over is it our website they w dot com. betty sets. today to take

a glimpse into the world of insects. no other class of animal has so many species. but a german study has shown that they populations up planets have. how do you actually count insects. the answer to that and other questions coming up. well come to you tomorrow today the science show on t.w. . is still a string night sky is an ever rarest sight for most people on the planet the night looks more like this. we shamans can shield our selves from too much artificial light. that sounds and animals especially insects are defenseless against light pollution we need someone who's trying to help them the 1st night protection

officer in a german city. on this autumn evening sabrina frank goes out looking for sources of light pollution in her home city of fulda in central germany she discovers a brightly illuminated plane tree on the university campus. this gets me really annoyed people forget that trees have a biological rhythm to the one in the light still has all its leaves while the one next to it is back on call that. much artificial light has convinced the tree it's still summer now frank is germany's 1st so-called night protection officer she goes around with a light meter measuring and recording the outdoor illumination 5. lux's the minimum intensity required here for squares and streets but there is no upper limit. left sounds i mean the light is supposed to be there to help us see powerful lights set

in the ground have no meaningful function it's just a night for nothing. when you walk over them they does all you they use up electricity light up the sky all for nothing it's next. she'll contact the university about this later it's her job to meet with officials property developers and businesses to raise their awareness about light pollution and advise them on solutions nearly all life forms have a natural rhythm of day and night in the darkness the human body produces the hormone melatonin which encourages sleep but too much light during the night disrupts the process which can just stir metabolism and regenerative processes in the body animals are affected in the same way. unlike us animals can't just close the shutters they have to live with the light.

studies show for example that black birds in cities start singing earlier in the year migratory birds lose their orientation over bright urban areas the strong like confuses them the possible consequences are still being studied. pond in bravery life is also affected by life as scientists in britain have found normally water for you swim up to the surface at night to feed on the algae there that keeps the ecosystem intact if it's too bright the water fleas don't come to feed that causes an imbalance. these 12 streetlights have been placed in the middle of a field by scientists from the life and it's institute of freshwater recolor g. in berlin they want to know how would like to get night affects insects is in the story. we see that the lights draw insects away from what they're doing and stop them searching for a mate. the insects gather near the light so you think it would be

easier for them to find a mate that but the sense that females patel to attract a male is reduced by saying quality. and an amount. every month between march and october the scientists catch insects in special traps they found on the street lights drawn up to 70 percent more insects that's compared to the numbers measured in the dark control field. but. also wanted to know how different types of lighting affect the insects and usually they used sodium vapor lamps with a color temperature of 1800 kelvin then in 2015 they changed to a brighter l e d light with 3000 kelvin. hall insects a very sensitive to ultraviolet light and so we assume that they will be more drawn

to the cold white lights than the warmer white ones such as the sodium vapor. but if there's no other light around the sodium vapor light also shines out very brightly. and so at the moment we're not seeing much difference between the 2 types of lighting it's of course on. that would suggest that if there's only one light source roughly the same number of insects will be drawn to it no matter what color it is so the scientists are now working to develop a lamp that the insects won't see. gets involved that's the complete the option a now is to have the lamp completely shielded said that the cover comes right down over the light source so that we're only lighting up the areas that we need down below the people the road and so on and off. that would not only attract fewer insects but also mean less light pollution for

birds and humans back to full night protection officers up enough frank has an appointment with someone from the university she explains why the lighting set in the ground is not good. we're not so keen on these buses and such and i'm green while the university has got the message and the campus was planned in 2011 it opened in 2013 like pollution wasn't such a high profile issue and so will the university take action. is usually good in the university we'll check the outdoor lighting on the entire campus next year and we'll look to see what's really necessary in terms of safety and what could perhaps be switched off those ground embedded lights are probably more for effect so i presume they'll be switched off. the phone asked us up to try to true. that would be another success for the night protection officer she's already achieved a lot in fulda right cold winds have been replaced with dimmer orange light and the

trees by the cathedral are no longer be. an illuminated listening hammer you know so we now have these modules installed they're flat and the light shines downwards to the right and left it's a nice warm color and the trees are no longer eliminated via the new models developed by the light meter institute are also due to be tested in fulda but what would help even more is an upper limit for the illumination allowed on roads and public spaces one more way of bringing back the night. how can we tell how a species is doing many conspicuous beautiful species like butterflies have been collected by researchers for centuries dad densify them and preserved them for they to generations for example collections from the vicinity of the german city of lincoln's book have been maintained since 1840. scientists recently reexamined them

while in the 840 s. the area had 117 different butterflies species by 2013 they were only 71. up to 3 local species have vanished altogether. they have required certain plants and ecosystems for their survival. they were known as specialists now german landscapes are dominated by butterfly species that are less picky. such as the common brimstone. leaf. and the meadow brown so the number of butterflies species that existed 2 centuries ago has definitely declined but what about the actual number of insects. that kind of study requires different methods from. researches at the entomological society in

crayford germany have been gathering data for 3 decades that allows inferences about the change in insect populations they used traps like this. the insects fly into the tent wall head up to the branches point and end up in a small chamber above a bottle containing a solution of ethanol the vapor daises the insects they fall into the liquid which preserves the. insects trapped this way day and night throughout the season the bottles the collector. every 2 weeks sometimes thousands of different species of fish out of the alcohol. the labs the catch is sorted. and the experts get to work. every member of the entomological society has a special area of expertise to amass hern fishes out of the flying there are more

than $9000.00 fly species in germany alone the team joins forces to identify the species the society's insect collections go back more than a century they document the diversity of local insect species and how that's changed over the years. since the late 1980 s. members have been recording not just the various species but also the weight of each catch. before the sorting begins the content of a bottle is weighed. members follow a standardized procedure to make sure they get comparable results. i have to perform every step in exactly the same way each time we have set procedures for times materials everything otherwise we can compare the results of. the society now has some 3 decades worth of data on the total weight of the trapped

insects. over time the research is observed what appeared to be an alarming patton. they'd been putting out traps in a clay fed for many years in 1909 the spatio did 1117 rounds of insects in 20 said that yielded just 257 grams that's a drop of 77 percent was this just an anomaly. they kept conducting measurements and finally reviewed the data. it collected between 19092016 from traps at 63 locations more than 1500 bottles of insects over 27 years. they found a lot of variation from year to year but overall the biomass trended downwards

on average 5 percent less per year which adds up to a huge decrease. if you look at the entire period from 1989 to 2016 that is 27 years then we're talking about a decline of about 76 percent. for. the shocking findings by the fed insect watches made headlines around the world. if you are looking for even more d.w. signs content some that you can take with you anywhere you want to go you should really check out our podcast it's called science unscripted will keep you safe keep you healthy and we will give you something to talk about you can find some spotify apple or d w dot com again our podcast is called science unscripted we hope you listen and until then please stay safe out there.

in the 19th century machines driven by steam and power at the 1st industrial revolution. the early 20th century saw mass production aided by assembly lines and electrical power the 2nd industrial revolution then came the said industrial revolution as technology went digital. now industry 4.0 is taking that to a new level robots people who machines logistics and products can communicate and cooperate directly thanks to artificial intelligence. let's meet some researchers who are making it happen. city in western germany is home to the. team and $29000.00 they took 1st at the world competition the annual robot soccer world cup offers researchers

a chance to collaborate on developing robot algorithms muhammad from indonesia was part of the team helping to develop artificial intelligence and robots the body is the robot and acts as its spring. my name is mohammad was this is you bought an industrial robot my research interest is robot perception how robots. their environment and how they respond to objects. this robot uses a time of flight camera which can capture objects into the end 3 d. using that sensory data it can identify and estimate the position of objects and its vicinity. mohamed uses machine learning to train his robot to recognize objects such as bolts or material such as aluminum and factories. first of all we need to

collect data of the objects that we want the robots to learn then we train them using that data this is what happens during the training process the robot predicts the name and location of those objects. the object that support. the robot is then instructed to autonomous men perceive and transport the object. that doesn't always work when the object has a complex. sometimes miscalculates its position. but if you thought it's a good navigator when there's an obstacle in its path it comes up with an alternate route on its own what kinds of applications are there for robots like this to industrial robotics. industry robots can be used to assemble components they can also be used to move goods autonomous lee from one place to

another. at the. almost. in agriculture my research could be applied to detect crops so that fertilizer can be applied more efficiently and that a salute. that they get into. it could help autonomous cars detect roads pedestrians traffic lights cyclists and other cars to reduce the risk of accidents that accident. hopes that research on artificial intelligence will also progress in his home country i'd like to see more indonesian researchers working in the field of ai we're now on the cusp of industry 4.0 which will have ai as one of its key. this could help it show the rate i research in many fields such as manufacturing and agriculture in indonesia. it's points to transform manufacturing agriculture and other industries the world

over and help them become more intelligent and efficient. if our old one is right right. do you have a science question you'd like us to answer send it in if we answer it on the show you'll get a little surprise as a thank you. come on just ask. you can get in touch by going to our website d.w. dot com slash science or check us out on twitter. the alps are a popular holiday destination. but it's not all fun and games in the cliffs in the swiss can tell of god bindon landslides are growing more

and more frequent erosion and global warming our contribution factor is melting ice and strong rains sent rivers of mud and rock star on the slopes how can people protect themselves. summative the hopeful that a mountain in the alps will soon collapse into the valley scientists at munich's technical university want to pinpoint exactly when it will happen and warn people in the vicinity as quickly as possible yeah far pretty hokey start the mountain is moving quickly and we might see rockslide soon we're planning to monitor this something that happens to see how good our forecasts are could we give a useful warning 3 days in advance and with your target for have was from just. going to warming. when speeds are high access is difficult and it's all a bit dangerous to see if you lift.

a large section of the southern summit is threatening to break off and tumble down more than 1000 meters. new cracks have formed some of them more than 100 meters long. the most striking is a huge crevice so wide a truck could drive through it it's growing by 0.4 millimeters every day that might not sound like much but it's very fast for a mountain. michaud cutter and his colleagues have already installed some sensors meanwhile they've broken. today the weather is good so they've come to repair the instruments. i say this is that i don't respond it's right now this is the most exciting crevice though it's quite small it emerged in 2014 i

can see 15 meters down right here but if you look from the rock face it's more than 100 meters deep. we put these sensors in here which can measure the gap to $100.00 of the millimeter but a lightning strike charge of the sensors this one is broken too so we're going to try and fix actions prove me a minute or 2 and often 3. new senses need to be installed on the other side to. the senses measure the distances in the crevasse record every change and send the data back by radio. the big red base is next. to the right are you ready i'm going to throw the rope down out of. the crevice has been expanding so rapidly that the upper edge tipped backwards and bent the sensor rods the teen have to climb down and re-install them they reckon that if all the cracks and crevices were to break open

at the same time up to 260000 cubic meters of rock could fall into the valley. there's a guy that's huge a one cubic meter rock fall is enough to block a ravine or a road that's the usual size so 260000 cubic meters would be huge there would be clouds of dust for hours it would probably take quite a while and be insanely loud. the dust cloud would be visible across the horn but i'm probably cover everything but it would be a major event. to get. a similar rock fall took place in aug 2017 on the pits in the swiss alps. around 3000000 cubic metres of rock broke off its northeast track. 8 hikers were killed in the rock slide

a massive river of modern granite swept more than 6 kilometers across the valley before striking the village of bondo. the village of him to horn back in austria at the foot of the hole for what it is not likely to be hit by a rock slide but mudslides afterwards could wreak havoc here too. the scientists hope that their continuous monitoring will allow them to warn the residents and any hikers in the area in good time. these plastic rods contain distance senses that expand and contract to monitor the size of the crevice as it grows. that data is then transmitted to the valley. if the southern flank of the hopeful go collapses that would also affect the

northern side in germany there are no villages here but there is a popular hiking trail. as a vendor for stock cliffs suddenly collapses the entire summers will be destabilized more rockslides will be the result will come to why don't you it's. really a made land and. also monitor the area with a drone. it's good let's focus on the summer for. the. search for a good altitude the photos you steered as smoothly as you can. flurry and major takes photos with the drone camera which he uses to make a 3 d. graphic image that is accurate to within one or 2 cent. is this allows them to detect cracks or to centimeters in when. their research is also take the opportunity to test different monitoring techniques.

on the back of the large crevice michelle cottle atta and his team are installing the sensors. that's easier said than done. but the problem is they're struggling to attach the devices. it's hard work there's about 20 kilos of tension on this for. you to. listen to them. so you have to be very careful the cliff walls are crumbling you need to check carefully because you can easily lose your grip. on one of this is everything. everything ok. but then it works.

you know what yes. by nightfall they've installed all the sensors another step forward in warning nearby residents in time because of an impending rock slide. was. that's all for this week's edition of tomorrow today the science show on d w. we'll be back next time with more hot topics from the world of science and technology. until then stay healthy i'm curious.

these are not the mountie use of your judgment garbage everywhere it isn't. seen our least there's enough already in the environmental activist and her fellow campaigners travelling wildly archipelago educating advising the boy and me to clean up what they are fighting back to the tide of trash. on d w. r i why do you mean. the sound

of the alps and now open your eyes what do you. see of callousness and ted as an outlier. welcomes what may be the most unusual event of the year. the high rise concert of the dresden symphony orchestra the words. in 16 hours. emancipation compatible with the brand. most muslim women choose between their faith and self-determination. that's why the rebel group the militant feminists looking to i don't want anyone to tell

me what the right where a head scarf or no. color women are striving to reform their islam. traditional prejudices. september 24th on t w. e island is burning and has been for 30 years originally a small a good and the waste crisis on the mounties became so pressing that the government repurposed it as a landfill now the island keeps growing with reclaimed land made of rubbish discarded junk and mounds of plastic the trash island contradicts the maldives image stunning beaches pristine water a dream holiday destination.