ah, a fine with ended glistening place of morning. the mediterranean sea. he had almost roar and to fall into korean, drift along, exploring modern lifestyles and mediterranean meeting people on hearing their dreams. ready to me journey this week. do you w everything on our planet falls downwards towards via centers. we experienced this gravitational pull all the time. without gravity, the earth wouldn't have any atmosphere. that means no oxygen to breathe. without gravity, we wouldn't have any other planet stars or moons and our soda system. without gravity would float aimlessly like astronaut on the international space station.

but we're not designed for weightlessness. ah, welcome to to morning to day the science program on d. w. german astronaut mathias mother returned to us from the i ss in may, how fit to see after 6 months of being weightless in space? t w is leah our quick to met marva the 1st time before his mission to the i assess. then she spoke to him again during the mission, also about the impact of weightlessness on the body. now he's back on earth where he told her that getting used to gravity again isn't easy. these will be astronaut mathias morrow's last 0 gravity hugs for a while. with mathias now are floating in as well as the now it's time to

squeeze back into the space capsule and return to earth with her was a wonderful ride back down from 0 gravity down to one gravity. in the mean time react to pass like the acceleration and up to 4 times bound by the way that was quite intense of a wide ride reserved for the spacecraft enters earth's atmosphere at 27000 kilometers per hour. the friction generates on re entry heated until it loops on the outside parachute slow down its descent and it lands in the ocean near florida . welcome, how common now diana, ah, on the ground, my very 1st smell was like being outside of the capsule in, in florida on the see on the ocean and was just fabulous feeling the thought in the air was feeling on the wind in your face of us beautiful, and we definitely saw a big thumbs up from

a t s bar back on earth after almost 6 months in space. flight he not only spent 6 months living in 0 gravity, but also without being able to smell much of anything. at this make chip thanksgiving dinner, the astronauts could only smell a fraction of the meal. mathias malware explains why one young face. you have 2 effects that like lead to the effect that you cannot smell as well as on the ground . one is that your fluid shift goes up and so all your sinuses kind of swollen and you cannot smell as well as on the ground. you always found a liquid like you congested. the 2nd effect this, that swelling smelling food. it also comes when there's a hot soup, for example, ot mill and the warm air rises and it brings all to the smell to your nose. but in theory g, the warm air doesn't rise. so physically it's are possible. so these 2 combinations

and resolved that he don't smell as much as on the ground. water also behaves differently in 0 gravity, including in astronauts bodies. in space, bodily fluids rise toward the head, which causes not only the all factory nerves to swell. when i fly up to face the fluids go up in the body and i had almost like somebody joking me. so that was my 1st feeling and you see those on the photo. when i'm in space, i have a round face, puffy face that changed immediately when i came back on the ground. and the very 1st time i saw my colleagues after a few days up to the landing, i felt like they all looked we at bizarre because they were like very slim and not like i remember them having seen them in space for comparison. here's my ts malware . in 0 gee, and here he is on earth. what all of us who come back from spicy gravity

sucks and it really is a tough on your body. your arms are heavy, your legs are heavy. and when you walk, it's kind of almost like exercise like just walking at the beginning, i had problems holding my head straight because in space my app was floating since the international space station orbiting the earth in 90 minutes. astronaut, see, up to 16, sunset cent sunrises in 24 hours. whether mathias malware looks up to earth or down doesn't matter. 0 gravity of fetch the inside of his body as well. and throws his sense of balance out of why it takes him a while to get used to living on earth. again, the biggest change was the phillip him because in the, in a if you have the sense of equilibrium and it's called auto lights. and he says

more christus and his christus floats in space. and so they need up to 5 days unto they settle down. and they give you the right information on if your head is like it, australia, and you need this information when you walk from the beginning. when i closed my eyes, i couldn't tell if i was standing or laying down it just like i didn't have this information since returning to earth mauer can't just flowed out of bed any more. even simple tasks like tying shoes and putting on socks are very different in space. but with a bit of practice, the astronaut has readjusted to earth's gravity. beginning you the exercise of like in a police test than your car stop. so they told me like, okay, go a straight line and you go like hulu. and if you want to take him, but they by day you get to these exercises with more flexibility with more bending . and then you're back in for type the effects of mathias mowers. time and

space remain in only one part of his body, his spine. meat on the sand at. yeah. on the ground, the spine as an s shape. it's because he walk in the run and so that is perfect for this movement. but in space, his spine stretches and it becomes try the straight line. and then so now it needs to form back again into the original shape and to fulfill the original exercise. and it's still a little bit adapting. mowers spent almost half a year living in 0 gravity in this high tech environment it took almost the same amount of time for his body to completely re adjust to the earth's gravitational pull. fortunately, mauer didn't suffer any damage while he was in space. the fluid shifts caused many astronauts to experience permit changes to their vision. according to his doctors

morrow is in tip top shape. his timing, outer space will have no permanent effect on his body. he's still as fond memories, though, like of the fact that in the space chores are much more fun when you can float. yeah, i miss floating and the, let's say, to make use of the 3 dimensions of the room. now we only limited to the flat surface that we're standing on. i enjoyed like living up there. it was like i go, i push and i'm already that corner. but having seen both sides, i definitely can see where the advantages of being in space. sometimes the thought of that of benefit to be on the ground. for example, when you eat your food, then it stays on the plate. it doesn't float off. that's a real benefit. a holiday meal that hasn't come from counts and sashes is one benefit to being back. mathias mauer is especially happy to finally be able to bunch on a crunchy salad and pizza. again. life

on the i assess is clearly not a particularly healthy one. weightlessness puts a strain on the body, not to mention the cosmic radiation. these high energy particles from space rained down on the earth and penetrate everything that lives on it. but in much smaller doses than on the i ss, ignacio munoz, 24 from chilly centers. the question about band how does cosmic radiation affect all living beings? the sun is the source of our lives. it provides the earth with heat and light. without it neither plants, animals nor humans would have been able to develop honor. but the sun has another side. it also hell's electrically charged particles into

space which hit the earth at high speed. so you can, over explosions also contribute to cosmic radiation. they throw out charged heavy atoms of nickel and iron, for example, which can also travel extremely fast. the radiation with the most energy probably originates in distant galaxies, massive black holes nest at their centers, and when they devour matter, they emit highly energetic radiation. a cosmic particle can have as much kinetic energy as a tennis ball falling to the ground from a height of 10 meters. no living being can withstand the bombardment of such high energy particles which are also electrically charged. cosmic rays can penetrate organisms unhindered and alter the dna of cells so that they mutate or even die. if those particles hit water molecules, they can form free radicals that damage souls and triggered diseases.

the body react to these radicals with inflammation, which damages the heart. fortunately our earth has a magnetic field, it deflects most of the cosmic rays away from us. the atmosphere also ensures that only a small amount of cosmic radiation reaches the ground. the particles that shower down can be made visible, which so called cloud chambers. there they leave luminous traces. the radiation increases with the distance from the ground on a long whole flight. and a matter of ours were exposed to 5 percent of an entire year's radiation dose on the ground. on the international space station, the dose is around $700.00 times on good an on the ground. that weakens the

astronauts mitochondria, the tiny power plants in the cells. if they go for a space, walk outside the space station, they get a year's dose of cosmic radiation. this poses a major hurdle for future flights to marcy. perhaps it's better to stay here after all. and the secrets of the universe can also be explored from earth. for example, how the world is structured. in physics, the so called standard model describes phenomena in the microcosm. everything that we see, the earth planets people, animals, plants, is made out of matter particles. the standard model describes the structure of particles and the basic forces that hold them together. if these basic forces didn't exist, the world would disintegrate into the tiniest elementary particles. to name the 4 basic forces, there is the electromagnetic force, the so called strong force,

the weak force. and the 4th one is gravity. but it's so weak in the world of the smallest particles that it's emitted from the standard model. there was one question with the standard model that physics couldn't answer for a long time, where to elementary particles get their mass from. this is where the heck space on comes into play named after the british physicist p to hakes to 1st propose its existence. the particle itself was finally discovered 10 years ago at a massive research facility near geneva, known as san it's europe's nuclear research center. our reporter, sushi mito, ramakrishna, went to see and learned that the iconic. so though fountain in lake geneva, switzerland. but guess what? i was actually there that me walking to the stickly,

ah, we are standing here a geneva with several international organizations, including the world health organization, the world trade organizations and the united nations office in geneva is behind me . however, we are not here to visit any of these organizations. we're going someplace special . follow me. i'm standing here at sun in front of the atlas experiment, building 100 meters beneath my feet is the large hadron collider where the higgs bows on was discovered. 10 years ago, sun,

the european organization for nuclear research studies, incredibly small particles that we are all made, or they have a giant donut shaped facility deep within the ground. that accelerates and collides subatomic particles to see what happens. on one such smasher taunts, they found a really special particle called the higgs, pusan, whose discovery short scientists, how sub atomic particles get their masses. at that time i was a physics undergrad in china, india. and this discovery was the biggest event of my college life. a decade later, in july 2022, the collider has been fired up again for the 3rd time. in this run, scientists planned to collect more data than ever before about the higgs boost on. i wanted to know why this is a big deal, so i met with andre david a little confused here, but this is the man responsible for.