the plants are getting. our vegetables are grown totally independent of the conditions outside so we've basically created our own climate inside the greenhouse that we can control as you can see we work with l.e.d. lights the plants don't get any sunlight the early days provide the sole source of light energy. ideal conditions for testing how life could be sustained on mounds the moment. at the moment a possible scenario could be that we send a greenhouse to mars which then sets about growing its own vegetables controlled from earth. called so that when the first humans arrive on mars they have a greenhouse full of food ready to be harvested exhausts of who would like unfun can. the coolest garden in the world could soon be a working model for outer space cool indeed even in ant arctic some is minus thirty

degrees celsius is as warm as it gets just thinking about it gives you goose bumps . but of course it's not only icy temperatures that can give you goose bumps. one of our view is encounter sent in an interesting question about that. why do some people get goosebumps when they listen to music. can affect us deeply. it can spark emotions and move us profoundly personal tastes aside. it can trigger memories and transport us back to a place where we've heard it before. several

areas of the brain are activated when we listen to music but studies show that some of us get goosebumps and some of us don't. research has affirmed that people with musical training and people who are open to new experiences are more likely to feel chills right up their spine in response to music. this could be. because they have cancer fibers connecting the order tree cortex of the brain to the areas that process emotions which means these areas communicate better if you're the type of person who experiences intense emotions you're more likely to get goosebumps from listening to music too. of course some music makes your hair stand on end of for the wrong reasons. the researchers also found that luke human voice is what most often causes

goosebumps. the cello and the viola are also very moving and incidentally if a piece of music gives you goosebumps you're more likely to remember it. thanks. fred why. do you have a science question that you've always wanted oncet we're happy to help you out send it to us as a video text over a smell if we answer it on the show we'll send you a little surprise as a thank you can just ask. dot com slash science or drop us a line at undisclosed site tech on facebook d w dot science.

the rain forest is a complex ecosystem supporting a vast variety of plants and animals. and it's all interconnected these organisms all depend on each other. and rain forests a crucial for the global climate believe it or not they are similarly complex ecosystems under water. i think grows just off the coast in areas where the sea floor is flat. huge beds of sea grass are often called the oceans rain forests and they play a similar role in marine ecology. they offer countless species both sustenance and protection seagrass beds also produce oxygen and store carbon dioxide by binding it in a long term form and mounted for the last two years with

a project see art roll vian weaver and his colleagues have been trying to find out what other vital functions the marine plants might fulfil. seagrass helps to damp the energy transmitted by the waves and also to curb the power of currents that in turn cuts down on erosion of the seabed the seagrass helps stabilize it. so it plays a role in coastal protection because the waves that arrive on the coast strike it with less energy. the first step for the researchers was to examine the condition of the sea grass beds on germany's coasts their results show that agriculture on land is proving poisonous to the marine plants global warming is also causing massive algae blooms that cut off the light that sea grass needs to grow european universities and partners from industry are working together on the c.r.

project. there's a huge amount of sea grass in the tropics but it's disappearing here because fishers often use dynamite and because trenches are being cut to lay pipelines that creates these corridors through the beds and on its own the sea grass is unable to repopulate those areas. it's. no artificial sea grass could help provide a solution to the problem just like its natural counterpart it would help dampen wave energy and prevent sea better erosion providing the right conditions for natural sea grass to grow back. the plastic sea grass is still in testing. the researchers want to know how long the blades have to be to prove effective. also where the material has to be flexible and we're it needs to be stiff. the testing at this facility should provide some insights. the unwavering and his colleagues try out current set different speeds that tells

them how well their artificial seagrass bad breaks up the currents. it really does work it behaves in a way that's very similar to real sea grass full of us we're going to be in the experiments that we performed we learned that the speed of the current and changes both within our bed and on the upstream side of it. but should the mats be constructed of plastic so i wouldn't a natural fibers be better the researchers are still looking for the optimal material. it has to be as close as possible to the real thing but also easy to produce. and most importantly it has to disappear without a trace as natural sea grass grows back this kind of research takes time in the frigid salt water off northern europe the materials they're testing break down very slowly and that how many actually our dream is to produce

a prototype module that can be adjusted to fit very different environmental conditions.