kentucky. food producers are the ones primarily responsible for the safety of the food. but you can protect yourself and your family from diseases and home by applying the 5 keys to say for food use them you also have a role to play. is this d w news than days or out top stories. u.s. senators have voted to acquit former president donald trump in his 2nd impeachment trial they voted largely along party lines with 7 republicans joining the democrats to convict trump for inciting the attack on the u.s. capitol last month the democrats needed at least 17 senators to cross the aisle for a conviction the. experts from the world health organization are requesting more

jato from china on possible early covert 19 cases china reportedly refused to hand over information to the team investigating the origins of the virus the u.s. has urged china to provide more exact datta saying it has deep concerns about the w.h.o. reports. protesters in thailand gathered at bangkok's to mock democracy monument driving it in red cloth to signal they were opposition to the old song defamation of the monarchy a scuffle ensued between protesters and riot police and several people were injured . this is d.w. news from berlin you can follow us on twitter and instagram it t.-w. news or visit d w dot com. oh lord. lord.

this week on world stories. immigrants in the u.s. are counting on biden women in moscow are driving metros again but we did gain in northwestern syria where tens of thousands of refugees are living in camps in italy they may have escaped civil war but they still haven't found safety. to bartend frame standing among charred to ruins the reminder of the horrible night. 4 weeks ago when up to 5 am lost his 10 year old daughter. in the bitter cold his 10 neighbors were trying to light a homemade furnace when the entire tent went up in flames. the fire spread very quickly there were huge flames and a motorcycle and some fuel exploded all the tents caught fire my wife and children

were trapped inside only 5 made it out of their homes and. their youngest daughter also suffered severe burns an aid organization brought the one year old to turkey for medical treatment doctors have sent messages and videos but the family's not allowed to visit. the border with turkey is closed to syrian refugees the mother fatima can barely stand it. so long i hope so much that you come back healthy but i saw the fire i fear the worst . tragedies like these happen frequently in the makeshift camps in the northern eclipse tens of thousands of people are living here in miserable conditions even basic necessities latrines food heating fuel and medical care. constant heavy rain has now made the situation worse people here were cut off from

all supplies for days many tents were destroyed aid organizations have been doing their best but are totally overwhelmed the situation is made even worse by the rampant coronavirus infection rate in egypt province has risen dramatically. coming out of the country we've done what we can and together with other aid organizations and the white helmets we've tried to raise awareness about the coronavirus we've handed out masks scientists in fact and. given the desperate situation. it's not enough. of them. have to fatah family are simply glad that the aid organization has given them a new tent some clothing and even a new furnace but they hardly use it despite the cold they have no money for fuel and they are terrified of using it anyway. my children and i have

a psychological problem in the tent we are afraid to light the furnace when my husband isn't here so our children panic and start screaming when they see it's very very hard for us. when they fled the fighting and their rates up the fatah thought they would only be here for a few days but now it's been 14 months and they are too afraid to go back home to southern eclipse because the fighting rages on. around 11000000 undocumented immigrants live in the usa during the trump era they lived in fear of deportation president biden has promised them a path to citizenship but many are still worried. that is what brings them together even on a cold day and meet the pandemic. it's the 4th anniversary of the massive travel

ban imposed by former president donald trump and now revoked by one of president biden's 1st executive orders. and so this band from the get go should not have ever been made it's rooted in divisiveness fear mongering in haiti and the fact that it separated so many families for so long as it's cruel and it's an ever be race i'm here in support of the action all of us meaning that we're demanding to the white house and congress president biden we need justice for everybody meaning. citizenship for all 11000000 undocumented immigrants. and to all deportations and the tensions in getting back are i from believe to the united states with her 2 sons 20 years ago and hasn't been home since her sons know no other country than their own the united states they were granted legal status by the dream act but they still don't have a u.s. citizenship so. it's hard to be an immigrant here it's painful it's sad it's hard

work you have to fight a lot. she arrived with a tourist visa and never left undocumented immigrants like ingrid a contraflow 5 percent of the workforce in the united states they are part of the backbone of the economy taking houses offices hospitals and doing the domestic work for many american families. because of the pandemic ingrid has lost her main source of income now she's also lost her home because she can't pay the rent anymore but she says what hurts most is not to be able to visit her family either most of it is difficult to visit our countries because if we leave we will not be allowed to enter again and it just for many immigrants solidarity and the will to fight have grown even stronger despite the pandemic and the trumpet ministrations policies and for those hoping to become an american citizen that toll now has a name joe biden. called.

the coronavirus hit germany hard but in a city in the state of mecklenburg for paul money the infection rate is much lower than the national average what are they doing differently. is it the cool baltic breeze or the rather calm and collected mindset of people in the north of germany so far they have made it well through the covert crisis. especially here in the city of. infection numbers are currently lower than the german everett. to supernews we are disciplined northern germans are quite different from everyone else. we're a bit more nordic and distance anyway maybe that's our secret recipe timing might have been one reason very early on the city started testing more people than ever

it masks quickly became mandatory in designated places and alcohol was spent on the streets earlier than in most places in germany. another reason might be him of our stocks mayor he is originally from denmark and had just started his political career when the pandemic hit before that he was an entry printer helpful when leading a team. of people of very surprised when i said now we're going to shut everything down it took 15 minutes and then they started working all together as a strong team and immediately put my words in action and i can understand that when the new mayor suddenly says we're going to shut everything down here we're going to get. a search reason for the low number of infections could be the north vaccination strategy relative to its inhabitants they have vaccinated more people than any other region in germany and there's something else

a few family doctors are gaining nationwide attention because they started vaccinating people in their own practice unique in germany because so far people had to go to vaccination centers to get the jap administering it has been doable for doctors here contrary to popular belief the biotech pfizer vaccine can be stored at normal french temperature for a couple of days. my one true true my wish of course would be that when we have enough vaccine available in the near future that we will have proven with this model project it's possible the family doc just can do the vaccinations it has brought in this idea and let the family doctors take over. but germany is still missing vaccine doses until that problem is solved the country's north will have to continue counting on its discipline and maybe the fresh baltic breeze. our last stop is russia for a ride on the moscow metro after

a decades long ban women can once again drive for the capital cities rapid transit system. women are finally in the driving seat and are pushing full speed ahead on gender equality in the russian capital. started working for the moscow metro almost 18 years ago at the time women were not allowed to operate subway trains in russia but arenas says for her it was worth the wait. this is my childhood dream i used to play with model ships and airplanes with the boys my father's a pilot so why the metro somehow it drew me in the fact that it's underground i guess it's like flying but under the ground. irina is proud to be one of the 1st 12 female metro drivers after all the moscow subway is legendary the soviet government started building it in the 1930 s.

calling it a palace for the people for commuting workers in the 1980 s. the government decided women had no place driving these trains they said the metro is too deep underground too loud and too dark for women and the vibration from the trains could damage their so-called childbearing function even now women drivers are only being deployed on the most modern trains and only operate one line runs partially over ground despite the fact that they get the exact same training as their male counterparts. in russia 100 jobs remain off limits for women for example metal manufacturing like the work in this steel mill mining and drilling on an oil rig are still considered men's work russian lawmakers insist the restrictions are still relevant today. we treat women with care here these tough jobs and hard labor are still seen as

men's work in our society also women are mothers so providing for and taking care of their health and their reproductive functions is important that's why we used recommendations from doctors to determine factors that are harmful to women at work . is on her way to her next shift the 38 year old says the metro feels like a 2nd home to her especially now that she's in the driving seat and the arena is optimistic the other band jobs won't be off limits to women forever. i'm sure they're working on it already but bands must be in place for a reason so the government must be taking care of women i would tell other women to keep believing and hoping no matter what you want to become everything is possible . eating a dog already has her dream job and the next group of women will start training to

become drivers soon but outside of these metro tunnels gender equality is still a long way off. where all 6 of the key to good. government. take on the world eat out of all this campus where all of the stories that matter to you. apply that. to my experience on release from being.

we are here is actually on fire maybe some. german. and jewish. i'm jewish so was. does that mean. in daily life. and at school something missing we shouldn't be given a special status but be completely normal. this look of shock like wow there's a jew at our school that's a bad thing 11 teenagers 11 stories. case i'm jewish and soviet. german and jewish starts feb 22nd on d w. plus

. if we just take the time to observe it nature provides us with a fascinating spectacle. over time the inhabitants of our planet of woven complex relationships of collaboration symbiosis dependence and predation. earth is the planet of life running crawling or flying life abounds everywhere. but for all these beautiful diversity to have proliferated earth has had to provide a favorable environment for around 4000000000 years. but. more then with the conditions which enables the blooming of life on earth. and could these conditions be present elsewhere resulting in alternative ecosystems.

in attempts to answer these questions scientists scour the cosmos for signs of life . they've built giant telescopes with which to probe the universe and listen to the whispering of the stars but space has remained resolutely silent. scientists have sent probes to the very edges of our solar system. but all they have sent back has been images of planets inimical to life. over the last 25 years however astronomers have discovered thousands of incredibly diverse planets in our galaxy alone. so many strange worlds with no sign of life not one of the planets similar to our own. so could it be that earth really easy unique.

in this program scientists will tell the fascinating story of how the earth developed how these bowl of ice and dust became the planet of life. in their laboratories or out on the ground they continued their research into the extraordinary circumstances which allowed life to appear and eventually transform this planet. they said were called palos all these were trying to understand with all the possible outcomes what it was that made the uniqueness of our system was on them push it seems like earth's climate fixed itself to always be favorable to life that's amazing secure those who don't know. each will explain the incredible saga from the viewpoint of their own discipline from the

birth of our planet to today's ecosystems it's a story punctuated by an incredible succession of lucky accidents to evolve if you like that usually there's the analogy with a lottery to get you to look at the probability of winning is tiny so in the game of planetary formation forming a solar system with our earth is like winning the lottery the. scientists are only now fitting together all the various chapters of this turbulent history our history that of a succession of helpful managers lucky chances and beneficial cataclysms. without a helping hand from jupiter and saturn without the moon without hurtling comments without the power of volcanoes without the genius of certain microorganisms we would not be here. it's possible that life is a one off with each case as to you know where else that only our last has all the

conditions necessary for life as we know it they're going to. let their also sausage in that sense earth is probably unique although we may detect some life elsewhere as it will necessarily be completely different. only it was this mind blowing series of improbable events that made earth the possibly unique life bearing planet it now is. the idea that earth may be unique could have been spawned by these famous photo taken on the apollo 8 mission in 1968 it changed our way of looking at earth there is al planet floating like an oasis in the magnificent emptiness of space. for the 1st time there we all were bacteria mammals insects and plants on the same

photo our planet a unique ecosystem and even today this photo hints that veiled with clouds and envelop in it's the in that miss fear could be alone in the universe. the 1st reason earth was able to become this welcoming blues fear is because it's at just the right distance from the sun in a narrow zone not too hot and not too cold when the temperatures are compatible with liquid water and life. but planetology just have discovered that earth's very presence in this goldilocks zone is itself 2 to an amazing stroke of luck. when the solar system was still young. this zone came close to being taken over by the planet jupiter so how was earth able to foam here.

research into the answer to this puzzle has been carried out it meets observatory. sundram orbit delhi has written a new account of the birth of our solar system. how many a solution is the planet working on the origin of planetary systems as like being at the tactic of so lets you arrive at the crime scene and use the clothes to try to work out what happens if by sea. knew about the abuses them so that act will issue from our solar system as it is we try to reconstruct how it formed and develop new doc when we come up with a scenario we get a shiver of excitement with thinking that maybe we've got close to what actually happened plus you have a more. planetology just start from the present position of the

planets attempting to hypothesize a scenario of the solar system's formation with the help of computer simulations. and also list i'm like all planetary systems formed from a cloud of gas and dust that surrounded the young son 4500000000 years ago. but our solar system seems to have a very different structure from the majority of planetary systems discovered over the last few years. and also to greek we now think that our solar system is pretty magic with them so they have a lot of chance events had to happen the threat to be as it is usually this suggests that our solar system isn't a typical planetary system but a relatively rare one more. because all shamash when we look at planets around other stars we see that when it's of a similar mass to jupiter are found in earth's spark class then up there this is

important if jupiter was in this spot with earth it wouldn't be here so we pull up . the discovery outside our solar system of giant planets similar to jupiter but much closer to this star posed a serious puzzle for astronomers because giant planets of that kind cannot form in such signs it planets if all the planets form in a disk of gas and dust that surrounds a young star the giant planets form far out where it's cold weather sags which lets these planets grow to a huge size close. like a snowball rolling down a snowy heal the planet grows ever. or bigger as it gathers to itself all the dust in its path. it calling a collect when a planet gets big enough when it acquires enough mass it migrates and works towards the star al it was on the. understanding this phenomenon was

a real revolution planetary migration explains why the majority of giant planets discovered elsewhere in the galaxy don't stay in their distant orbits as they form they spiral inwards towards this dark but in that case why didn't our own giant jupiter migrate closer to the sun why did it stop just in time leaving the space free for the future earth. we also feel should get on the saturn is very important this is a giant planet too and as we've studied the dynamic between jupiter and saturn we've realized that saturn was able to start jupiter's migration and even reverse it off it should be so jupiter started migrating to the sun but when saturn upon her there was a complicated gravitational effect which reversed the migration and the planets moved further from the sun more usually. thanks to sas and the giant planet jupiter changed trajectory it left the in

a zone of the solar system and it was this change of course that saved earth's future. without the intervention of saturn and jupiter would have ended up in the zone where earth now is earth would never have formed and we would not be here. our planet was luckier than its future neighbor man's because on its migration jupiter passed through design when mars was forming. the giant planets swallowed up a lot of the material available leaving only crumbs for mars our neighbor would end up with 110th the mass of earth which in turn. reduced its possibility of maintaining an atmosphere favorable to the line. we're understanding how planetary migration totally changes other planets get distributed player size their position in space and the collisions between these objects before they stabilize the planets make the system developed in its only

particular way with a 52 year. narrowly st by sasson our planet could keep on growing and being just the right distance from the sun meant that it would later have liquid water on its surface. and yes 4500000000 years ago our planet was completely dry it formed in the rockies own in the solar system gathering up dust with barely any water content so where did this water which would later give us our oceans come from. after initially in danger ing our young earth jupiter would give it a helping hand. for most young to be there look we think that the formation of the growth and the migration of jupiter out let

these bodies which formed far out in the solar systems and so there was called bodies with water sent towards the enters around where they crashed into the still forming earth contributing their elements to it up within or zillion more that. these bodies asteroids and comets enrich the chaotic pull of matter which earth then was with water but as our planet started to solidify the water molecules remain trapped under the surface in the magma. yes an essential mechanism for. and its future was already in place and starting to bring some of that water to the surface. it's a mechanism that still very active today. with

. these folks painters these mountains of fire that's been helping to bring water to the surface from the very beginning in earth's youth there was a lot more full kind of activity than today. so i go from now book called when you 1st think about it all kind of you think of lava danger and life

threatening eruption eyes but volcanoes were essential to life as we know i view it that can occur in the. said destruction on you that's the destruction of san juan village by the volcano particle t n n 1944 you don't do better the people had to move away it was

a real catastrophe so to know the artist has made the volcano quite small to get the whole region was devastated where you haven't gone yes it appears from nowhere in a cornfield was i thought no one could have expected it when the village was destroyed that it was still quite small but take all. you would call some balck a nose aren't inimical to life on the contrary they were necessary for life to develop throughout earth's existence to do that then.

but also are such explosions common. they happen not that office you know i've been here 6 years and i've seen 4 or 5 with an explosion like that of ash may fall on surrounding villages from last and you guessed it so what's the gas made of a composite i don't say it's 95 percent water vapor song and although cain was around the world it's mostly water was only a prism along. the water vapor stant by the volcanoes allowed the water truck to the earth's balance to make its way to the surface. this has always been an. essential mechanism for keeping our planet hydrated and alive. cool point 4000000000 years ago thanks to the volcanoes earth sky changed filling with clouds. dilute the and rain started to lash the surface it rained for millions

of years and the 1st oceans formed. yet barely had they appeared then they could have just as quickly evaporated. as good finisher since the difficult bit is having liquid water simonyan you don't just need age to well you need enough atmospheric pressure and atmosphere i mean on the moon there's no atmosphere so there's never been are you left with want to. give birth sat mystere hadn't been dense enough the water would have evaporated into space in the form of vapor. fortunately the gas produced in abundance by the volcanoes maintained enough of an atmospheric pressure for earth to be able to hold onto its early oceans. but the oceans of the young earth soon faced another danger that of freezing over. the sun was still weak 30 percent less

bright than it is now earth therefore needed a greenhouse effect to keep its surface warm enough and its water in a liquid state. this greenhouse effect appeared very early on in earth's history thanks to the water vapor and c o 2 abundantly present in the atmosphere. to no 6 today of course we know that c o 2 increased by human activity is a bad thing but too much isn't good but we needed some back there and still do if there wasn't a bit in the atmosphere the surface temperature would be 15 degrees colder then with the sun younger and less bright it would. but much colder cool birth would have been frozen but about minus 60 degrees it's also not favorable to life she said of. the volcanoes where yet again contributing to making earth habitable in their ex aleisha as they were constantly spewing out shoot quantities

of c o 2 along with the water they. pursued the c o 2 sat out by the volcanoes accumulated the greenhouse effect increased the ice melted and the oceans thaw get good we think this happened 400 to 500000000 years ago we call this period snowball earth and there's a earth emerged from it like that if it's in the greenhouse effect increased and we got back a climate with liquid water favorable to likely kid. but with the constant eruptions the c o 2 from the volcano as was steadily accumulating in the young earth's atmosphere the greenhouse effect could have gone out of control turning out planet into a furnace. fortunately that was a safety valve c o 2 can dissolve in water. over millions of years it's trapped in calc areas

formations and no longer acts as a greenhouse gas he remains trapped you know that at the bottom of the ocean in mineral form. the quantity of c o 2 in the atmosphere then varies depending on the amount of liquid water on earth's surface. over a very long time scales this make an ism regulates our planet's climate. get back to a fascinating thing about earth which may make it unique is that all through it's very long existence all 4 and a half 1000000000 years variations in the lunar. asadi of the sun have been slated for by a variable greenhouse. and if it feels. like a sort of geographical thermostat keeping the earth always inhabitable with oceans on the surface is also want to show us.

but these thermostat needed one more tweak to get it working perfectly and make our planet truly favorable to life. over hundreds of millions of years but the c o 2 in the atmosphere could have ended up trapped in the form of count carious wrong at the bottom of the ocean. they wouldn't have been enough in circulation to keep the thermostat going and it would have broken down. a mechanism possibly unique to our planet allowed for the reinjection it c o 2 into the atmosphere plate tectonics. that there is a compunction you have to realize that the earth has a sort of crust of cold and solid rock inside there's warmer rock the mantle which

changes shape and all this is. clear so you might imagine that the crust forms a solid complete shell like an egg shell around a softer inside but that's not right the movements of the shifting rock on the inside were powerful enough to rub up against of the crust and crack it in places where. the earth's crust is fragmented into 10 plates which are displaced by the movements of the mantle. where the plates come together they crunch over each other dragging the rocks that were at the bottom of the ocean deep into. the bowels of the earth dulce just the c o 2 recycling begin. under the enormous pressure and heat the robots melt and the magma is spewed back out onto the surface taking the c o 2 with. the c

o 2 escape seen gas form during volcanic eruptions finally back in the atmosphere the c o 2 may or may not be captured again by the oceans depending on climatic conditions the circle is complete. sometime with the sure it's a very particular geophysical thermostat which we think has really controlled the climate conditions on earth and made a life impossible even a short lived. if you changed in the plate tectonics just a little having slightly more or fewer than 10 plagues and then with the recycling in c o 2 concentrations would have been different and the bias of yours would have evolved differently they or close. this.

is the us so has this bags another important celestial field secure this at plate tectonics just which seems to be the key the key to life on earth did i just feel there has been light tectonic something really common in the rest of the galaxy angels and or something unique more very rare. up in the solar system you don't find anywhere else in the black in the new. plate tectonics maybe the fact to which earth's neighboring planets lacked for life to appear on and survived them. yet one of the solar systems on the rocky planets did get off to a good start early in its history. with volcanoes c o 2 and russia enjoyed an environment similar to earth's. i don't know if you so there was an environment imagine a blue mars with lakes and rivers up on something there was an ocean in the northern hemisphere it also it was an environment of favorable to life would be

said i think. all would seem to have been set up then for the planet to function in a similar fashion the current state of the red planet however clearly shows that something went wrong. so mass and young mars cooled down much faster that i disagree massive defense of mars is half the size of earth and it's a bit like comparing a huge pot of hot water to a couple of easy i mean bushels of a big part cools lower than the cup of tea which is ours as well that the inside cord faster is south but beyond so there was no chance as we understand it for plate tectonics to arise by you so if there was no recycling that could maintain a climate favorable to oceans for billions of years mars had hundreds of millions of years and it grew something and there after it became a very sterile that planet and it pristine.

monsters tragedy is that it's too small and fell into a deadly spiral because of its smaller mass there was insufficient gravity to hold on to its atmosphere the drop in atmospheric pressure was inexorable and the solar wind swept it all away some of the water evaporated the rest froze blue months became red mars a victim of its own small size. was about all that there so you think the earth is just the right size so why is there no fly. tectonics on venus which is the same size as earth why is that time one of the unlike earth has been is has hardly any water the water's all gone and the mantle is very dry not very lubricated human a bit can't move much more doesn't place any plates on the surface especially new so venus has a sort of unbroken shell all around the planet it doesn't have the mechanism that

earth so it's not just important to be the right size but to have water in the mantle out and that you have all the rules on. earth has enough water to lubricate its plate tectonics venus doesn't and yet the 2 planets were formed from the same materials. one very special event during earth's youth could have hydrated its depths. and this is you know this is the idea for the mantle to have got sufficiently hydrated and sufficiently lubricated early in its existence earth suffered a huge cataclysmic he's in we think that the young earth was struck by another planet the size of mars which we call taya.

a few tens of millions of years after its birth the earth suffered a cataclysm which almost destroyed just how bright the chaos of the solar system's origins still reigned. in asia imagine around earth hundreds of moons or dozens of the planet mars colliding repeatedly these objects grow in the form planet maybe planets. if you suddenly an object the size of mars comes to. the wards are earth and crashes into the surface at a speed something like 15 kilometers per 2nd that comes under the plume at possible . thing crashed into worth the energy released by this enormous collision was acquittal into hundreds of billions

of hydrogen bombs land back that then won't you impact is so violent that the impacting object is destroyed less still for the surface of the earth is completely liquified and the core of the impacting body penetrates the earth's mantle and becoming part of the earth's core we think the earth's core fused with that of the impacting body. back though. the collision was so violent that the water contained in thayer was driven deep into with school mixing with the water already present there in this way they are hydrated the depths of earth's mantle making it possible later for the plate tectonic system to function. as a speaker at sea for me secular service but if it's right and it's impressive it shows us that.