Skip to main content

tv   Tomorrow Today - The Science Magazine  Deutsche Welle  December 14, 2017 8:30am-9:01am CET

8:30 am
d w z learning course because fish german made it easy. to w.'s program guide. like. the whole. dot com highlights. what does a football loving country to which its goals. will tell you how the german soccer made it back to the top. in our web special. dot com. football made in germany. you tune into tomorrow today coming up a. cosmic dream come true the discovery of gravitational waves. witnesses to the past why scientists find carlos' in the alps. and the
8:31 am
sound of music what it does to the brain. these sounds of the order to visions of faint signals detected by to observatories in the u.s. in twenty fifteen. this sensation of discovery was decades in the making the experimental proof of gravitational waves. and the chips from deep in the cosmos promptly gannett three researchers the twenty seven thousand nobel physics prize. we are a few on facebook and twitter to post you associations with the topic of gravitational waves without looking it up first. take the fat and shut some seann wondered if they might be the basis for the formation of planets and stars. misstates treated that the ripples in the fabric of space time due to the collision up. black holes and he knew they'd been discovered by the like oh the power of
8:32 am
trees he thinks they're cool. but describe them on facebook as similar to the ripples you get when you throw a stone into water except that they propagate at the speed of light as einstein predicted. thanks for all those remarks. the detection of gravitational waves has opened up a new era for astrophysicists what makes it so exciting. as we're walking through the forest we can only see the bushes and the trees. but as soon as we stop listening we can hear all of this population of birds that are all around us that we couldn't see before. the same is with the ways we could look at stars galaxies planets but now with the ways we can study objects that we just couldn't see before. them all is an
8:33 am
astrophysicist at the albert einstein institute in pottstown. the scientists here develop models to improve the detection and analysis of gravitational waves. but when they were first detected in september twenty fifteen. was in his office it's a day he says he'll never forget it was such a surprise it was so so shock to get for the very first time a wave saw loud. right when we turned it down it was a lot of princeton's it took us a while to make sure that it was actually real work because the two non-specialists these might just look like a few squiggly lines but to scientists they tell a dramatic tale of two black holes that spiraled into each other at high speed
8:34 am
until they merged. that produced the first gravitational waves that were directly detected by researchers. the next breakthrough came in august twenty seventeen researchers were able to see for the first time the death spiral of two compact neutron stars. data from the wave detectors made it possible to determine where in space the dramatic encounter occurred. that enabled around one hundred telescopes worldwide to focus in on the star collision of a moment the discovery ushered in a new age in astronomy is multi miss injuries to me the era of most the most interest for me has begun in august looking at the sky looking at the universe across ovals possible mediums the gether. einstein would have been thrilled he
8:35 am
predicted gravitational waves one hundred years ago but doubted they would ever be found. vivia raymone explains that physicists back in einstein's day didn't know of any celestial objects heavy enough to produce such waves. this is one of the observatories where the initial detection of the waves was made in two thousand and fifteen and two years later the nobel prize was awarded for the discovery three pioneering researchers received the accolade ray weiss kip thorne and barry barish. for an achievement that took decades of work after so many years of very hard work so after such a long time having this for completion this very prestigious recognition is just fantastic. more than one thousand specialists around the world played a part in the groundbreaking discovery. the
8:36 am
institute in potsdam has been providing computer simulations that show which signals the physicists should look for in their measurements. i find it truly fascinating to work in this field and i have to say it was already very exciting before but now that we have always detections is just tremendous we get really almost on a daily basis it feels good to prove the universe and ask questions that we couldn't even dream of asking before. the next challenge will be to shed light on the mystery of dark matter a so far unseen substance believed to hold galaxies together. the source of this mass could be black holes detectable by the gravitational waves. in some cases the gravitational wave signals are converted into auto built chirps and the researchers hope to hear many more of them soon the detectors will be fitted with
8:37 am
new technology and neighboring new discoveries what we want to do next is be able to identify those sounds a lot of them not just identify what is a bird what is a car but what type of birds how big is a particular bird how auld is it flying away is it hungry what is it telling us all of those questions will be able to answer. during filming tomorrow today fans sense and questions about gravitational waves for astrophysicist video. you'll find his answers on their website. as well as on twitter and facebook. and keep your comments coming we love to hear from you. once upon a time three hundred million years ago the land mass on earth was connected in the
8:38 am
supercontinent pangea. it broke upon us around two hundred million years ago to form the continents we know today. that take this admission spread and covered the regions where the alps now stand europe's highest mountain range. that's why scientists are hunting down the fossilized weaknesses of that time when the alps were under. the brown neck south of munich may not be the most spectacular mountain varia but take a look under the surface and take a trip back in time over two hundred million years through the planet's history. it's a journey that martin knows and alexander not slow embark on regularly they're essentially professional time travellers here in the limestone alps they search for prehistoric
8:39 am
fossils silent witnesses to the sea that once existed here. was we here seems interested as these are remnants of the tech this ocean so this is a coral colony and it's to do these are branches of coral cement wife solution would you on here we have a cross-section which is why they look round and see you and we think they were part of a small reefs a few meters in diameter and. all the rock in this section of the else was formed by organisms the limestone was produced by both corals and miniscule algae over the course of millions of years it built up on the seabed to form a three kilometer thick layer. when the african tectonic plate began to drift towards europe one hundred million years ago the seabed broke apart and was subjected beneath africa. as the two continents collided the layers of rock were pushed upwards probably to heights of up to six thousand meters. erosion by
8:40 am
wind and weather gradually wore down the highlands to the size of mid range mountains. and then the alps began to rise again the pressure from this clash of continents also pushed the former seabed upwards. along with the petrified legacy of past marine organisms even today's paths that lead up the brown neck opened up a window to those distant times you notice noticed there on fossils everywhere. so it's a mass of molluscs. on the road to be launched to. a large number of the specimens laws around here are just fragments of mollusks. the accumulation of shells here probably came about due to a prime ordeal storm just some of the finds give the researchers a fairly accurate idea of the era they're currently digging in. these
8:41 am
ammonites are between two hundred and two hundred four million years old further up the mountain the two paleontologists focus on an inconsiderate q.s. layer of material in the surface of the path and uncover. a minor sensation the ground is strewn with tiny snail shells species that were previously unknown and fish scales further evidence of a reef teeming with life. the brown neck also bears signs of a dramatic event in our planet's history two hundred million years ago the transition from the triassic to the jurassic period was marked by a mass extinction probably unleashed by volcanic eruptions. conditions in the shallower areas of the primordial test this ocean changed dramatically. what do you see in this is a steep hillside from the early jurassic period. or the ribbon habitants disappeared together with the corals in addition to
8:42 am
a monarchs and certain mollusks died out so what we're looking at here are the remnants of a major ecological crisis. but some test this ocean species did survive perhaps because they lived in the seas deeper sections instead of the shallower waters. it's a question that's of acute interest to stephan keel from the swedish museum of natural history in stockholm. the shine on this mare or rocky see is a plateau in the back to scott alps here he finds layers of stone that were once home to masses of brachiopods another group of hard shelled animals. and one of these valves open up a little they reveal arms covered in fine hairs called cilia and when water streams into the shell they serve as a filter separating particles of food from the water not once but.
8:43 am
there are a range of similar finds across the line stone alps their sheer numbers can't be a coincidence so what explains their prevalence steffen killed believes that the brachiopods were dependent on one particular source of nutrition in the depths of the testis ocean methane. oregon in the u.s. state of oregon we found mass occurrences of the same brachiopods in deep water sediment from the same area called we were able to confirm that this was connected to a former methane deposit as the methane emerged from underground it would be ingested by bacteria which grew in numbers and the brachiopods in turn ate the bacteria we suspect this also happened here in the l n i didn't. primeval times methane deposits were as they still are the oases of the deep sea creatures at home in this habitat have always adapted to the extreme surrounding environment. which could
8:44 am
explain why the brachiopods lived on species and shallower waters underwent mass extinction. but first stephanie keel has to prove that brachiopods also fed off methane here in the alps. that he collects samples to examine the land the creatures left their mark here with their limestone shells and their secretions researcher hopes to have solved the mystery in a few months time. and there are probably a number of other unknown ecosystems to be uncovered in the outs each contributing its own chapter to the story of how the mountain range was born. every who supplies travel thousands of kilometers today when to go it is except for the basing of wings. in contrast to that migration. in germany sent in
8:45 am
a question. elizabeth club from cologne wants to know why do migrating birds call to each other during their flight doesn't that cost them too much energy. every autumn there is frenzied activity at the gathering in resting places these cranes coming from northern europe have thousands of kilometers still to go before they reach their winter quarters wild geese also head to warmer climes in the winter when they begin their long journey they all honk loudly this vocalization is an important form of communication. much communication between animals goes on heard by humans elephants exchange signals in the infrasound part of the sound spectrum the tones are so low frequency that our ears can't pick them up. manta rays send acoustic messages underwater by
8:46 am
beating their wing like fins we don't hear those signals either. that's in contrast to the noise the migratory geese and cranes make during their long journey. the birds constantly call back and forth that helps them keep track of their young in the air and tells them whether the lead bird needs to be relieved calling costs energy but saves energy for the formation overall. by the way the calls of a single crane are roughly as loud as those of a human weighing in around sixty decibels. if you have a science question go to our website and send it in if we answer it on the show who did our d.v.d. with a light hearted look at some of avid einstein's greatest theories. the most
8:47 am
important thing is to never stop asking questions. the a. mistake is world music to the is that the mind. scientists are finding out how it acts on the brain. the music is not only a powerful emotional experience it also has an influence on the structure and development of the neural networks in our heads. matilda was born three months prematurely now at the age of two weeks she's a subject of a study conducted by researches from the university of zero does seeing if music can help her development three times a week for a bag comes to matilda. she wants to find out how music affects the brain imprint
8:48 am
your baby's. until it is a buzzy at us for sheen's than stored in one man behind it's far theory is based on various studies that showed how music stimulates many parts of the brain at the same time and above all that this musical learning as it's called starts even before birth by its forward it will begin so pre-term babies should be very receptive to musical learning as was accomplished. when fleet of bad comes to matilda the baby visibly relaxes he lifts her hands. and she opens her eyes. bruce searches are testing their theory on sixty babies using music therapy with thirty babies and not using it with thirty others this baby is fifteen weeks old he
8:49 am
was also born prematurely fredericka has a bag has been regularly humming and singing to him today was actually the date he was originally do. an m.r.i. scan shows the researches how his brain is developing. the initial results suggest that music doesn't deed stimulate infant brain development . but how does it actually work neuroscientist looks young has been looking into the phenomenon for twenty five years but is. what i'm interested in is how brain activity develops dynamically over time and the extent to which this brain activity is changed by our individual experience of music as well as other factors.
8:50 am
ones to give us we hope to be able to use our findings in the future to develop clinical applications. goals clinician and then when and. the monitor shows the electrical activity occurring in the brain of this study participant in a soundproof cabin she is listening to valleys full seasons the piece your mind slips young coves the autumn t. spent in boston they'd listen to vivaldi on long walks in the woods. he's interested to see how the piece affects people who don't have an emotional connection with it based on the electrical signals he records it can see what kind of brain activity is occurring. as abilities are keep it in mind if i compare this brain activity to my own there are
8:51 am
similarities but there are also differences for example not only the order to the cortex is activated in both cases recently but also other areas that don't normally play a role in processing sounds. but in my case feel this is more pronounced submission miro versatile z. and. this is what happens in lots yank his brain when he listens to the vivaldi piece. the music he would see it in my brain the music evokes a storm of activity. activating lots of neural network areas that are involved in the control and generation of all sorts of information related to perception and memory. is in four months or nine or born. if listening to music has such an obvious effect on the brain what effect is playing music have. explored the
8:52 am
question in earlier research and found that playing an instrument promotes the formation. new connections in the brain. on the international space station the i s s astronauts are constantly doing experiments also on themselves for example to find out about the effects of weightlessness on the body during their month long stays in space. down to a long term study has also started to design together basic data about human health . thirty six year olds are have been on this taking part in what's called the rhineland study the physical and mental health of some thirty thousand participants is being assessed over their lifespan to find out why some people develop diseases such as alzheimer's and parkinson's while others
8:53 am
age healthfully. every four years so i have been and who works as a vet gets a head to toe medical check. it's in the cystic best month i think it's important to take part in such a study plus the medical checks are exciting when else would you get an m.r.i. scan on a regular basis we have an aging population in the study is looking at out simon why some people remain healthy as they get older and others don't mention. it miss international researchers are working on the study they're experts in various fields from neurology to psychology this pseudo civil court of the study is to ensure that people can live longer healthier lives we want to understand the factors that lead to neurodegenerative disease in later life such as dimentia which bit of the immense also loosen the researchers look for biomarkers in the participants blood that serve as indicators of processes underway in the brain some
8:54 am
of the blood samples are snap frozen given that they're stored at a temperature of minus ninety degrees so they can be studied at a later date. for example if we want to examine them for certain facts at us or in the context of studies that are impossible yet. we both and participants undergo an hour long test of their mental agility including vocabulary concentration and powers of observation yet even glad i'm going to read a series of words to you please listen carefully and then repeat to me as many words as you can remember so you know what the movie sneddon could the tests are confidential other study participants mustn't know what to expect. and i'm saying i don't one with a nice hard work. you have to listen to lists of words that are completely random and then repeat them. so it's interesting what you remember and what you don't.
8:55 am
know. the musculoskeletal system provides the first clues to any kind of latent brain disease the study will be assessing the participants over their entire life span any changes to their health or recorded. life because. we look at how certain movements are carried out with parkinson's patients for example the movements tend to get smaller they sort of peter out which is why people with parkinson's tend to shuffle a bit with very small steps. the studies being conducted by the german center for neurodegenerative diseases its aim is to identify the key to a healthy life how does the brain change in the course of a lifetime. the ultimate goal is to develop preventive measures. for boy the best of us highlight the scooter prevention is better than cure sites ideally in cases of conditions that emerge gradually this plenty of time to take measures against them. so named. medical marathon is almost over she'll be
8:56 am
back in four years time for her next round of tests. that's it for today next week we'll be looking at how dragons and robots my collaborators out in the fields. this kind of high tech agriculture could be especially helpful to is going to. join us us with .
8:57 am
entered the conflict zone confronting the powerful two months ago motos most famous investigative journalist staff make our on the guy lead syria was assassinated in a car bomb and feel you should target the top politicians and business leaders my
8:58 am
guest here in valetta is the deputy prime minister chris fuck these governments allow be a budget said the mafia eva the fish and thirty minutes w. food. images from an isolated country. images from north korea any telling photographer captured fascinating shots of everyday life in a regimented society. an exclusive peek behind one of the last iron curtain it's. a north korean diary starting december twenty eighth on t w. the something nice print ios came to dealing with and even at that i killed many civilians was immunised coming including my father was selfish and i was a student i wanted to build
8:59 am
a life for myself. but suddenly life became knowledge kind of. providing insights global news that matters d. w. made for minds. he tells us stirring stories. it makes us laugh. and cry a little tremble and smile. magical images and big emotions that none of us. know the magazine every weekend on d w it's. if. you look at me speak your language stuck up. for content in dari pashto and order prospects for returning to our web special. journeys life in
9:00 am
germany and the prospects for those returning home to. join the discussion on t.w. dot com and on facebook. prospects for returning. d.w. may for minds. this is state of the news coming to you live from. still walking but wounded. parliament deals a blow to britain's theresa may as she heads to a summit in brussels we go to norway and ask could a king cry.


info Stream Only

Uploaded by TV Archive on