billions of hydrogen bones. back that then won't you the impact is so violent that the impacting object is destroyed less selfless service of the earth is completely liquefied 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 theia was driven deep into with school mixing with the water already present there in this way they are hydrated the depths of the earth's mantle making it possible later for the plate tectonics system to function. as a speaker at sea for me she said speculative us but if it's right and it's impressive it shows us that for life to have existed on earth all this time that we needed that chance impact a very early in earth's history to hydrate the mantle and maintain its lubrication and have this phenomenon this geophysical thermostat all throughout the planet's

existence would have been at. least seen in catastrophe would end up being beneficial in another way as earth gained a new companion which would play a major role in the blossoming of our ecosystem out of the cloud of debris resulting from the collision a new body would gradually form the moon. which. just . misses them to the earth moon system is unique in the solar system and as far as we know in the galaxy this is that it's a very particular system where both objects are large objects this is why certain astronomers talk about double planet and then move on.

barely had it coming to existence than the moon was already exerting a powerful influence over the earth because of its considerable size. the history of the earth moon relationship has been studied very closely thanks to the apollo missions. ministry up a little bit in the apollo missions placed reflectors on the moon surface these reflectors are used today to reflect back laser beams emitted from earth such as this one behind me. there's a regular emission from here at the color i'm glad so in the frat house seeing that our phones. today many observe the trees around the world like this one in the outdoor programs to the moon closely every night scientists use

a laser beam to make a precise measurement of its distance from earth. so this balance will close up on these are important experiments because we can measure how long it takes the laser beam to go to the moon and back. so we can measure in real time the distance to the moon. and one major finding which we sort of knew before but are now sure of is that the moon is moving away it's moving away at a speed of 3 or 4 centimeters per year about. 'd these measurements of showing that when it formed the moon was much closer to the earth than it is today. that is soon after the moon formed if anyone had been here to see the moon it would have been gigantic in the sky because it was so close to them said it was going to acknowledge it's 380000 kilometers from earth but 4000000000 years. ago we think it

was only 15000 kilometers distant guns make you mad at them. that potion it in iraq so many of the moon had a 1st consequence of creating bigger tide and therefore maybe stimulating biological evolution to make. 'd the time it's caused by the moon churned up the oceans and contributed to the dynamism of our ecosystem and the mutual attraction between the 2 bodies also had a crucial effect only earth's rotational axis. has had to face about something modern that the effect wasn't just the tides it was much more to that effect that it stabilized to the famous tilt on the angle of 23 degrees by which i heard the act as a filter in relation to its trajectory around the sun will do so they and this they will has a constant for billions of years i mean yeah then it seems you know it but we do know though that if the moon had been there the earth's rotational axis would have

oscillated causing rapid changes in the climate and this could have had a huge consequences on evolution that with rapidly alternating periods of glaciation and warming for example on it all the less assume that the notion of what. the moon helps the earth maintain a climate stable enough for the slow and gradual evolution of life. without the moon the earth would have been faced with the same up he evils as its neighbor months. saw the mounds of mars phobos and deimos are so small that. plano stabilizing role

on the rotational axis. yeah if there have been a very big variations in the rotational axis of mars laughs. what's more this rotational axis has moved all around the surface of mars just about there i suppose office. mars became a desert earth a garden of eden. like the present earth moon system is the result of a long series of accidents making the earth and moon a unique couple unique. earths now had a stable climate and atmosphere and liquid water surely everything was perfectly set up for life to appear and evolve but earth still lacks the basic ingredients of

life organic molecules. all living things on earth are made of the same building blocks long carbon based molecules scientists now think that a large proportion of these molecules came from outside the planet earth. limerick you are all getting the organic molecules is the basic elements necessary for life is are found in space only it was only yesterday only what their leader writes some are 60 percent organic material which is you know and a lot still to earth. the original organic molecules which may have sown in the seeds of life on earth were present in the distant cold zone of the solar system but how did these building blocks of life travel to our planet the rosetta mission. the 1st to ever attempt

landing a module on a comet shed some light on this mystery. here be bring was one of the scientists behind this whole dangerous mission says his crew on that was really this is what we saw on the 14th of july 24th in when we got this we thought gosh i suppose we can't land on that it's not feasible with us if this is tiny that quick you know method of the whole thing is only 4 kilometers and it's revolving around an hour after that without we never find a spot to send down and it was crazy so it covered more for. a few months later the probe feeling managed despite all the difficulties to touch down on the comet cheery. always you have killed a few days here you see the allies leg and an object made just a few years ago and here the old is an object in the solar system so they are the

same as when it formed 4600000 years ago it was the 1st time and it will happen again so more on that we set something down in a common. with the 1st analyses the scientists realized that comets are very different from what they had supposed he may have value to adorn the shelf and there's no water on this comet surface you know there isn't an ounce of ice here we thought it was the ice with a few molecules and not at all always see here is organic material to them at allegheny . thanks to the rosetta mission scientists discovered that comets are abundant in the building blocks of life. up until then they had thought that only asteroids little rocky bodies with us in down. since the birth. the solar system comets and asteroids have

gravitated in the colder regions where they capture and store these original organic molecules. then these comments and asteroids veritable messengers of life transport these molecules into the inner zones of the solar system. as they pass close to a planet they disseminate these building blocks on to the surface providing it with the wherewithal for life. scientists are keen to undertake liberal tree analysis of organic molecules similar to those which fell into earth's oceans this was the name of the high of booze a 2 mission launched by the japanese space agency to bring back to earth a few fragments of this original organic matter. the sample was collected in july 29th team 300000000 kilometers from earth the mission was

a success there in the mall this is the moment when it touched down the hallways you could pick it to see the leg touching down there with all its mind blowing out of what a pro but then you see it take off again pressing to create the principle for taking examples as for it not to linger in this song it touches down all of the fires the bullet and leaves again with the debris that the guy it takes a few seconds with us and it all happens very far from earth of course that there is still. a slave it's completely mind blowing we hope that in a sample there's carbonaceous material from which we think life on earth began a theory. the probe is bringing back a 10th of a gram of these precious building blocks of life similar to those which landed on the planets of our solar system some 4000000000 years ago. a population at the order from this material we want to fight. find out what the

initial ingredients were in the waters of earth primordial oceans and all that made possible the great chain of terrestrial biology eurasian top. comets and asteroids could be the missing links of a long chain the chain began with the simple molecules found in the early cloud dusts and culminated with the building blocks of life from which life on earth 1st sprang the chain leading to life.

back. constable. for sport uk the octavia r.s. i.v. has the best of both lot of the successful model from skoda is now also a plug in hybrid. the multi faceted car is great for everyday use and a bit of find that all. wrath. 13 was on d w. good shape. there lurking everywhere. well

just think it's kind of disgusting no it's not because those bacteria a very appalled follow a health and well being. what to do and what not to do. affect of hygiene concepts during the corona pandemic. in 60 minutes on d w. what secrets lie behind. discover new adventures in 360 degree. and explore the mating world heritage sites. w world heritage 360 get kidnapped now.

this is developing news live from berlin donald trump is acquitted of inciting last month's capitol hill riot 7 republicans joined the democrats in voting to convict but it's not enough is trump survives his 2nd impeachment trial full so coming up in germany bans travel from regions in austria and the czech republic after a surge in highly contagious coronavirus mutations only essential travel will be allowed for at least the next 10 days. and dog. does legal slump continues

like gold by yelling hold aren't allowed the home side to salvage a draw against tough and. i'm jarred raid welcome to the show donald trump has been acquitted of inciting last month's attack on the u.s. capitol as expected the u.s. senate fill short of the 2 thirds majority needed to convict the former us president that said 7 republicans voted to side with the democrats making it the most bipartisan impeachment trial in u.s. history and despite the staying of a never before seen 2nd impeachment donald trump has hinted at a comeback. smiles all round donald trump the legal team revel in their client's acquittal we won guilty. it was always going

to be an uphill battle for democrats they needed to convince at least 17 republican senators to cross the aisle. in the end though only 7 republicans voted to convict giving former president donald trump 2nd acquittal. 57. for ease 3 the day's proceedings was time for both sides to make their closing arguments hoping to swayed any last minute votes to believe based on the evidence you have seen that mr trump actually wanted and indeed willfully inserted an armed insurrection to overthrow the u.s. government would be absurd democrats pushed back saying the senate could stop violence from happening again the cold hard truth. is it would happen on january 6th can happen again. i

fear like many of you do that the violence we saw on that terrible day may be just the beginning. donald trump was unrepentant in welcoming his a quick to saying the trial was yet another phase of the greatest witch hunt in the history of the united states. after the vote democrats scorned republicans for voting to acquit but there's a majority of the senate republican caucus including the republican leader voted to acquit former president trump signing their names in the columns of history alongside his name for ever and despite voting not guilty republican senate minority leader mitch mcconnell conceded that the former president was responsible for the riots there's no question. there president trouble is practically.

and morally responsible for provoking. the lawyers have rested their case on the matter of donald trump's involvement in the january 6 riots but the divisions in us society remain the equip to opens the door for trump to run for the white house again in 2024. s. and washington bureau chief poll has been following the trial in the senate over the last few days he has her assessments. after 5 days of listening to deliberations between the house impeachment managers and former president donald trump lawyers we now know that trump has been acquitted of charges that he calls the insurrection on the 6 of generally the feds he now has the ability to run for office again if he so chooses this is a clear signal that former president trump still has

a tight grip on the republican party this was the last opportunity for the party to get rid of him and to spawn bastid ways of governing but fears that his loyal supporters will challenge republicans up for reelection forced them to not make any risk that could hurt their political future the democrats on the other side made a compelling case for the 1st few days showing the destruction of insurrection and the pain it cost many but on the last day the bumbled on the issue of victimises sentences were confused and ultimately weakened their case for the democrats they have a lot on their plate finished voting in biden's cabinet and passing a truly in dollar culverts relief package why tell us this is probably just relieved that the trial is over and that they can just move on with their political

agenda and that was in a poll from washington day well here in germany the country has banned travel from regions in neighboring austria and the czech republic after a surgeon with after surgery infections i should say with a more contagious coronavirus very unstable only essential travel into germany will now be allowed from the austrian region of to roll and check border regions but there are worries about the impact of the restrictions on trying to an industry. starting sunday travel restrictions will be in place between prevail and to roll where the highly infectious south african variant of covert 19 is sporadic in austria travelers test are controlled by authorities and varia occurrences of the variance are more and more frequent. better to be on the safe side i feel that we're taking the right path. from monday at the border between germany and the

czech republic will also be affected cross border workers will only be allowed in after daily testing and if they work in transport of goods or in health or animal care. we need test centers at the borders where truck drivers can get tested quickly if they're healthy they can continue their journey if not then of course not. it's a shipping nightmare that threatens distribution chains. we really fear that the goods and people will be stuck in a never ending traffic jams and that this will lead to even bigger difficulties for industry and trade. according to brussels border closures and travel bans should be avoided and germination make exceptions for cross border workers and essential travel. therefore the commission is asked

to produce president to discuss to quote emission of travel restrictions truing the next. for now stricter control seemed the only way to avoid a 3rd wave of infections. and here's some of the other developments in the coronavirus pandemic south africa will reopen 20 of its land border crossings to allow normal travel off to restrict sions were implemented to control rising covered 19 infections last month rahway journeys in china during the usually busy luna new year holiday all down by almost 70 percent amid coals for people to stay put to avoid a new outbreak of the virus and venezuela has received the 1st 100 $1000.00 as of raw russia's vien vaccine medical and health personnel will be the 1st to be inoculated. here are some of the other stories making news today the u.s.

has expressed concern and urged china to provide more doc to the world health organization on possible early covert 19 cases russia reportedly refused to hand over information to the team investigating the origins of the virus beijing has fired back saying the u.s. should stop pointing fingers. myanmar's military joint has suspended laws that place restrictions on the country's security forces the change will allow them to resume detaining suspects or searching private property without court approval it's part of a series of announcements off to more than a week of countrywide protests against the coup. and form a european central bank chief mario draghi has been sworn in as the new prime minister of italy he will head a new national unity government he's pretty just to pay ministration collapse and druggy was asked to take over. some sports news now and germany's

bundesliga brissie dortmund's dynamic duo of jade and sand show and hold on both scored against hoffenheim. who came into this season with tata lambie sions and with the home side could only manage a draw. darkman coated in tears it has won only half of the game since taking the helm back in december his star studded team came into this clash in just 6th place and against hoffenheim they were once again relying on their backup goalkeeper marvin hits with roman burkey out injured. dortmund drew 1st blood in the 24th minute jaden sanchez doing the honors my sand show leaving the hof and home defense in his way. but the lead didn't last long. before making it one all 7 minutes later sebastian rudy time just passed perfectly

and bore a finish the job in style. and early in the 2nd half and i'm took the lead thanks to. god hears knew he'd been beaten. rudy once again with the assist and verbal heading home. with his team facing a loss yelling holland charge forward to score a lead equaliser and as tempers flared a scuffle broke out before he could celebrate. the young norwegian scoring machine putting on a display of sheer will and power. but the frustration was evident on his teammates faces as tears which is dortmund side had to settle for a disappointing 2 all draw. and by leaving cousens or 2 goal lead go to dustin minutes against mines in managed to level the affair after

the break patrick cheek made it to neil to leaving prison with just a few minutes left in the match she outmaneuvered their minds defense and beat the keeper for the scole his 6th of the season but mines battled back and netted 2 late goals to deny leaving clues in the victory robot glass silver he. with the 1st of the 2 which was also his 1st ever wonder sleep go. if you haven't realized yet today is valentine's day and people around the world are celebrating love in all its forms and after a difficult year there's even more reason to celebrate in one builds a nursing home where nearly all of the residents have been vaccinated against cove at 19 w. caught up with one couple there as they approach 6 decades of marriage. there's a romance in the air at this brussels care home long time lovers francois and nico are marking their 58th valentine's day. they moved

here together when false was health began declining. if he's going i'm going because him alone are me alone that's unthinkable. also i was just 17 when he met his soulmate he says it was love at 1st sight. she was just beautiful she still is. a movie he asked me to marry him almost immediately if that's true and i said yes. also on nicole are among the lucky ones at the beginning of the pandemic covert 19 tore through belgian care homes claimed thousands of lives. but now that almost all residents here are fully vaccinated care home directory assistance has more freedom to spread the love this february 14th. she wants to share messages of togetherness after months of

isolation we want to them that they are not alone in in their rest home we are not alone we are together and we live together so we love each other we can't. just always love you. and you couldn't fall so are dreaming of many more date nights together and their hope for the future. that will be happy no matter what do you want. me don't worry come on. you see he's always cold and i am always warm welcome him to or to. the couple hopes the worst of the pandemic is now behind them feel stick together in sickness and in health. here's our top story for you u.s. senators have acquitted former president donald trump of inciting last month's

attack on the u.s. capitol in the 2nd impeachment trial senators voted largely along party lines we've only 7 republicans joining the democrats not enough to get the required 2 thirds majority needed to convict trump. europe today thanks for watching. it's about billions. it's a problem our work. is about the foundation of the new world order. the silk road. china wants to expand its influence with this treatment were.