everyone experiences it differently as if there are different forms of time. time with a dimension, we know we won't live forever. an illusion. about time presenting futures past starts april 14th on d. w. the joys of spring are highly visible in the animal kingdoms, writes and rituals of courtship, displays of prowess and flirtation, moving in pursuit of the ultimate plaza, mating. yes, even animals can have sex without offspring. thanks to contraception. that's just one of our topics this week. mm. hm, ah, hello and welcome to to morrow to day

d. w. science magazine. with the rise of spring time can also be seen in zoos. these red pandas still haven't connected yet. and these male blue backed mannequins are going all out to whenever a female. but if all the animals here were to fulfill their natural desires, wazoo would soon become very crowded. the answer is contraception for the males. this is leopold as a responsible bush pig. he takes the pill and this guy could also use it. or this guy mail birth control has been around for quite a while now for animals. but it would also work for humans is similar way.

contraceptives are already being used in zoos with mammals are closest relatives in the animal world. sex hormones looked exactly the same and all mammals, testosterone, for example, produces horns in one species, facial hair, and another, or a sexually attractive body odor. but in all cases, the hormone is required for sperm production, without which there'd be no babies. oh, you just can't get enough of them. right. that said, here in unix hell upon zoo, there is room for new babies, but not so much that the animals can reproduce as often as they would in the wild veterinarian. dr. hans pita steinmetz is in charge of contraception, which obviously varies depending on the sex of the animal. in question. in the case

of the male bush pigs, he uses hormonal contraception. that means putting lamp hold on the pill, except it's not a pill, but an injection. by dimensional pains, last line with a male bush peaks. you crunchers go and give the animals a shot last fall fall bryson and we have to administer it with a blow gun device. it's repeated at regular intervals as a booster vaccination. since it's why fi more every 2 or 3 months before most to illustrate how the vaccine works. and importantly, whether it would also be effective with the human male. let's look at how sperm production and mammals basically works. imagine a man is a multi story building with the production department on the ground floor. sperm is

produced down here in the testicles, along with most of the testosterone 2 operations are run up top in the brain via the hypothalamus. and right next to it, the pituitary gland. the hypothalamus is essentially the boss starting up production and releasing the g n r h hormone, the g n, r, age and strengths. the pituitary gland to produce 2 additional hormones, l h, and f, s h f s h is responsible for the sperm production line. and l age for testosterone production. while sperm cells are being turned out to stops drones, swarms out across the man's body, resulting in a little body, hair growth here, and a bit of muscle mass there. before returning to the hypothalamus. would that message that operations are now up and running? the boss puts the brakes on g r h production. but once testosterone is no longer flowing,

the order comes for production to start back up again. the whole system is called the hormone feedback loop. and for contraception that loop has to be interrupted from leopold that happens by a remote injection using a blow gun, a kind of vaccination. in this case, the bush pigs own immune cells are used to interrupt the hormone loop. they've been programmed to block the generator messenger halting production, and that means no more g n r h, no l h or f s age, no sperm, and no testosterone either. leopold has all the features of a male bush pig, the tusks, the masculine jaw, but very small testicles, no libido and no sexy sent. although he does seem of pretty

content little pig the same whole contraception, not a bad idea for disease carrying mosquitoes. some research has already been done on it. it's not needed for the many homeless mosquitoes. they bite, but then just ish. but a female enough in these mosquito can carry malaria. parasites that infect the host, it feeds on to scientists are looking at ways to prevent a malaria infection. ah, scientists, sylvia bore to gown is researching the parasite plasmodium farsi poem which the mosquito transmit when it bite, and which can develop into malaria up the line. parasites dangerous is that they grow inside your at bell south in and in your blood. and they multiply for each

pass. i think within 48 hours gives rise to $16.00 to $32.00, a nuance ands and they, they growing numbers. they and they binds to all the lining of the blood vessels rights. and when in very small vessels they can block circulation in these can cause a severe problems mostly in children causes a thing called a cerebral m malaria. dr. portugal i learned that the malaria power site can stay dormant, the body for around 6 months without the person getting sick and insight that can help in fighting the disease. vaccine would be helpful. i see very limited possibilities as we've what we have right now for an if he sent a vaccine against malaria. but we, we've seen in many countries that just developments of good hospitals, access to treatments or access to health actually brings numbers tremendously down

. and also, mosquito vector control, the current vaccines still does not offer sufficient protection, access to medical care and many regions with malaria is not sufficient. either. mosquito netting treated with insecticide still seems to be the most effective protection against the disease. but the mosquitoes are developing in immunity to these poisons, therefore, further insights into fighting malaria are still needed. russian scientist, yelena liver. sheena is researching the pathogen itself, but rather the anal felice mosquito that carries the malaria. she learned that not every kind of mosquito transmits the disease. based on this insight, researchers are now looking for more targeted solutions. the know about the 3 contract mosquito spacious worldwide. so it's really quite the number of different

species and many of them are complex, suspicious. so they are inside, there are still sub specious. ofa are the same species and out of nose i would say around 30 it's believe globally again there on the world of those which can transmit, right? and so the number, sorry, nathan, of and down in the particular area will be a one to really they the, the most efficient vector. this one method scientists are working on is called gene dr. technology. the mosquitoes are genetically modified, so they either become sterile or no longer are able to absorb the malaria pathogen . this means they can no longer transmit the disease. this technology can be used to break, ah, let's say a specific way. and that, and there are many tools now which will be developing now to contain it. so you

could basically stop spreading off with insects. and of course, you don't want to pull you to the world where a few spacious or something genetically modified without really been sure of that. of this a safe promising research approaches to start the transmission of malaria from mosquitoes to humans. but there's still a lot of work to be done before the bloodsuckers finally become a little less scary. vaccination against malaria already exists with more in the research pipeline. like some covered vaccinations, one military vaccine is based on m r n a technology m r. renee is constantly being created in the nucleus of every so it's full name is messenger rival nucleic acid. after it has copy genetic information, the m r n a leaves the nucleus and it's called the blueprint,

tells the cell to make a required protein. it's quite literally the genomes messenger. before the pandemic, hardy, anyone had even heard the name a marin a. so what's behind its sudden overwhelming success? ah mathias henson has been researching m r n a for decades. he leads the european molecular biology, laboratory, m, heidelberg. it's new to him that so many are interested in his research bell swung by giving out and out about m r and a the dinner table conversation is something that never happened before the pandemic up on the new involved mr game m r n a. serves an important function in the body, because it's mo bile, it can transport blueprints. these blueprints are saved on the equivalent of hard drives and our body, specifically in the dna on the chromosomes. they stay there undisturbed. to build

proteins, genetic information must be translated m r n a contains the same information, but is more immobile. it's the way the blueprints are transported. it leaves the nucleus and brings the information to the ribozymes. this is where the m r any is read. all the possible protein combinations can now be billed from the generic specifications transmitted the body needs them for pretty much all of its processes. m r n a was long neglected by researchers. chemically. it's not much different than dna. however, it's more stable and therefore easier to handle the sculpture much earlier, there were exciting findings about dna and already was a bit of a late comer. but that late comers really caught up in the last few years,

elijah of boyhood. still some people believed in the application of m r n. a early on, one was in my her while doing his ph. d here in tubing, and he discovered that he could bring em renee and all that information into cells without any special packaging. at 1st he thought he'd made a mistake and hopped on a mother's got then very carefully, i repeated, everything's about documenting, controlling it all. exactly. and got the same results also then there was this eureka moment. you know, really i, when i thought the, please my god, if this actually works, it'll be revolutionary roots young with his colleagues, her later found at the company cure evac pcs. great advantages and the medical application of m r renee them on yet. so i'm on the modifying other vaccines requires a lot of animal testing to see how well it works with renee and i'm just have to

modify the sequence on the order of the letters if you will hold. second, you can talk to the body and just move it, that's the vision. and it's the same production process, whether you're developing an arna for polio or for corona, but it's the same in terms of production. when researchers know the genetic sequence of a protein, they're now able to derive that corresponding m r renee. it's produced artificially packaged and introduced into the body, which then build the desired protein all by itself. that's also the principle behind m r n a coffee vaccines. the body gets the blueprints for viral spike proteins and uses them to train the immune system. but there was a problem at 1st because when m. r. any moves about freely our bodies view it as a foreign substance and sound the alarm cut to lean county co together with her

colleague drew weisman, solve this problem. they used to trick and modified the m r n e. so the body no longer attacked it. finding the change that would produce that effect was the case of trial and error. and it was, you know, caught, coming down from, wanted a different modification and you are just expecting that. finally you have 3. maybe at least one of those, you know, which is not will there jamaican logo for all danny's lay them. so that's what we found. that was the breakthrough still, it took decades of research to enable the development of an m, r n. a cove at vaccine and record time in 2020. had the pandemic occurred a decade earlier. this would not have been possible mathias, hence it has great hopes for this new type of vaccine. that 1st and this is an obviously m r. renee is new of all of my nose, easter when i consider that

a positive a positive in center. and it's true that messenger r renee is very unstable in fabulous the highest i. what that means is it enters the cells, does its job, and then breaks down and disappears. housing the mist existence. so the coven, 19 vaccines are very likely only the beginning for m. r. n a technology? ah, so an m r in a vaccination doesn't alter gene. but there are effects on the way to alter the genes of some living creatures to produce ingredients for medication. gouts are especially interesting to they can produce a substance that prevents from pisces o blood class. gates that make medicine for humans. there's one situation where a solitary goat can beat 90000 people producing at the from than

doesn't ring a bell. then let's start from the beginning. researchers have been using the option of introducing foreign genes into organisms in the hope of producing medicine. diabetics have to regularly inject insulin for a long time. doctor's obtained supplies of the hormone from the pancreas is of pigs, but supplying the world's diabetic school require the insulin from one and a half 1000000000 slaughtered pigs per year, which exceeds the global population. in the late 19 seventies researchers began producing the gene responsible for insolent artificially when it was introduced in coal, i bacteria, they began producing intellect. ah, after pressing the bacteria, researchers were able to isolate the insulin to the relief of animal loving

diabetics. many other drugs are developed in this way produced by genetically modified bacteria. but the method also has its limitations. the bacterial cells then also modify the desired substances. the end result is not always ideal for humans because our cells also processed substances except in a completely different way than the bacteria do. one solution to this problem is to use organisms that are more closely related to us, such as plants, despite the superficial differences, theirselves convert the active ingredients in a similar way to ours, which is why they're often better tolerated by humans. right now, researchers are experimenting on to battle plans to see if they can produce a vaccine to fight cope with 19 and in addition to plants, certain animals are also

a potential source of solutions. researchers were able to engineer a goat with a gene that's responsible for the production of anti thrombin 3, which inhibits blood clotting. but it's not produced in sufficient quantities by some people in certain situations. after surgery, for example, it then has to be administered. anti from 3 can be obtained from the blood of healthy people, all be it only in small amounts. and this is where the goats come into play. the anti thrombin gene was placed in them in such a way that the desired active ingredient appears. many animals milk, one leader yields 10 grams of anti from bin 3 over an entire year. that means a single goal produces as much as the blood of $90000.00 humans were provided. so goats are a major life, so we'll know what comes out of an address and

what comes out of the back end of grazing animals is something completely different . but it isn't just way go. sheep and casual droppings are important for the ecosystem islands of life. to pull insects and animals. in an average couch, patty weighs 2 kilos. measures 30 centimeters and diameter is 2 centimeters thick. each animal unloads at least 10 of them on the pasture a day. they are excellent fertilizer or ever one. lance. it stimulates growth, creating a clump of grass. but cow patties are much more than fertilizer. and one wild meadow in the tell by geese and nature reserve near fryeburg. insect expert jo and buddha, and biologists help at nickel are searching for fresh dung. here we have

a fairly old patty. mike, you can tell the surface of the patio is dried out and has a relatively thick crushed what we are already able to see. the 1st larval stage is developing inside. you can see that here, fly larvae like that, that grows in the dung is in turn, food for other insects. if we mainly find these bugs inside them is here, for example, we have a clown beetle and it's relatively small, but there are significantly larger species. 2 of these are purely predatory, wished they have a very large mouths, similar to a butcher's cutting machine limit with which they chopped larvae into small pieces and, and then eat them. this is a very complex food web. cal, patty's are little islands of life. the dung provides food and shelter for thousands of creatures. the colonization of patty starts after a couple of seconds of his existence already with the arrival of dung flies that want to lay their eggs in the warm. patti's sewland,

the 1st dung beetles appear. they did passageways for their offspring, these and turn our prey for spiders and predatory bunks. 2 weeks later, the earthworms arrive soon the paddies themselves will disappear in their environs . there is always lots of life. birds in other meadow inhabitants such as lizards come to help themselves to the insects. dog, dog catalogues, o predatory beetles who birds long and then birds of prey, thus will those represent 5 tropic levels as as an end of what a patty generates has huge functional complexity. one's a lot. and if the paddies weren't there last, the cows stayed in the should, then we would lose elements of the landscape. when one grazing cow produces up to one ton of dung per month. and that generates 20 kilograms of insects,

which can feed 10 kilograms of birds. 3 storks, for example. or 30 starlings for this equation to work out natural farming is required. like an ta burgeson. mm. mm hm. ah, here 40 animals live on 70. hector is a forest and 30 hacked airs of pasture. it's never mode ah, to day how about nichol wants to take stock of who was living on this pasture? with a modified leaf blower, he vacuums up a sample and finds over

a 100 different species. it isn't open this sample. there are often cicadas and bugs as intervals. there are also beatles and very often a spider let you dish even everything that jumps around above ground the high. you look inside and you can't imagine it. you can no longer find that kind of diversity in a normal meadow that there is a normal cow pasture near by. the meadows of this operation were recently mode. the biologist takes another sample for comparison. and he can't even find a dunsen species as if you really are far fewer kinds. exactly. it's a disaster for insects and birds. there is almost nothing left. and what about the col, patti's themself? many animals in this pastor are given medication to ward off parasites,

which affects the done of his any financing case. i don't see a single battle. i don't see any vital holes long, no creatures at all. welcome back to the wild meadows and the nature reserve habit. nickel believes we could easily preserve this wonderful realm of flora and fauna. in men van dodged on frank's it's just 5 percent of germany as pastures were wild as more extensive all season and past year. lease must insect life would get a massive grooves, reflecting even on the smallest spaces like this one, we could double or triple biodiversity and turn species and individual numbers within 2 or 3 years. in fact, i've seen it work here. it is it vices? ah, none of that would have been possible without the humble cow patty,

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d w. ah, ah, there's a dw news live from berlin, on the brink of humanitarian catastrophe. the mayor of the misuse port, city of mar, you hold warns of disaster. if more evacuations are not possible, uses the russian military of trying to wipe it from the face of the earth. wholly genocide, also wanted to show the kremlin, slammed us president joe biden's comment on vladimir putin as a personal insult. quite in however, refuses to apologize for his.