almost done we're almost done that's why Venus gets so hot so one of the reasons we haven't sent people to Venus is because it's just so incredibly hot over there that no human being can survive under any kind of current spacesuits we have now there's a different problem though there's a different problem a reason that we haven't sent many probes and we're never gonna send people if co2 kept going up and up and up and up and stopped coming down what gradually happened to the weight of the atmosphere over time what happened to the weight of the atmosphere on Venus if co2 continued to go up and stopped coming down nobody's trying on this one if co2 continued to go up and stopped coming down with the atmosphere get heavier or lighter over time heavier yeah it would get heavier so and if the atmosphere is heavier so basically what I'm getting at is that the atmosphere on Venus is a lot thicker because of this process than the atmosphere on earth and that makes the atmosphere a lot heavier and what that does is it increases air pressure at at ground level now the air pressure in Florida which is roughly sea level is call is measured at one atmosphere so what we're all living in right now is a air pressure of approximately one atmosphere if you went someplace with twice the air pressure it would be two atmospheres and then three atmospheres and then four atmospheres right now does anybody know what happens to the human body if we go to too much pressure what happens to the human body if we go into too much pressure yeah we die there's a certain point where the pressure gets so high it can completely crush the human body and if you go under enough pressure it you will pass out if you try to go above something like 10 atmospheres because your body is trying well it has a hard time running and that's good for you because it helps us to avoid going to higher pressures than we can handle but if you go to beyond 20 atmospheres of pressure you will die and if you go much beyond that you could end up completely crushing your body to essentially a liquid okay so you will turn into paste under too much pressure okay and again 20 Atmos 20 atmospheres is what kills a human being okay so what is the air pressure on the surface of Venus 90 atmospheres the pressure on the surface of Venus is 90 atmospheres so even if it wasn't very hot if you as a human being tried to land on Venus what would happen to you yeah you're crushed into a paste so badly that we would have a hard time telling that you were a human being imagine the worst possible roadkill and because it is so hot you would be cooking so you turn into a paste and then that paste would cook kind of probably like eggs or something so we don't want to send people to Venus one last thing that comes from all of this is Oh somebody is asking if we could be suspended in the air because of this air pressure kind of like swimming in the ocean I assume I because this is a gas I don't think that we would be able to remain buoyant because I think that our body would still end up sinking in this material if it was a liquid that might have worked but I think because it is a gas I think we would would still sink all the way down to the ground I'm not an expert on that though so take that with a grain of thought now on Jupiter we eventually float because eventually you run into the liquid material and this atmosphere is not a liquid it's all gasps okay now good question though good question sorry I don't fully have the answer for you there now okay so remember we said that there were a lot of clouds on Venus because it's entire ocean evaporated however one thing you might not know about water is that it is actually very fragile in sunlight okay we don't typically think about this because our water doesn't stay in the clouds very long because eventually the water in our rain or our clouds will rain back down but we said that that doesn't really happen on Venus the water would just stay in those clouds a long time ago and what happens in that situation is that the sunlight is actually able to slowly over millions of years break that water down and remember water is h2o so when you break it essentially you're taking that molecule made of hydrogen and oxygen and splitting it into hydrogen hydrogen and oxygen okay and that hydrogen and oxygen is going to mix with something else that comes out of those volcanoes and to help you guys figure out what that other thing is I want to ask this does anybody know what volcanoes smell like actually I'll tell you that volcanoes frequently smell like rotten eggs because of the gas that's coming out of them does anybody know what gas coming out of volcanoes makes them smell like rotten eggs sulfur that is correct sulfur so sulfur is coming out of volcanoes and normally that's not too much of an issue but on Venus because you had all of this broken water in the atmosphere all of this hydrogen and oxygen some of that hydrogen and oxygen a lot of the hydrogen would escape to space but some of that hydrogen and oxygen would be able to combine with the sulfur and form a new molecule and that new molecule is h2 so4 h2 so4 actually I'll write that down it forms h2 so4 so even though the clouds on Venus started as water clouds probably because of combining with the material from the volcanoes and being broken down by the Sun the clouds have now all become h2 so4 now does anybody know what the other name for h2 so4 is actually somebody already wrote it it's called sulfuric acid so the clouds on Venus are made of sulfuric acid and that is here we go so there are no more water clouds on this planet just sulfuric acid now do you want to mess around with sulfuric acid yeah absolutely not that is a pretty strong acid another name for it is car battery acid so the acid that makes up these really thick clouds on Venus is made of the same stuff that is in car batteries okay now do you want to stick your hand in a car battery does ma know it what would happen if you open up a car battery and stick your hand down into those chemicals just like yeah just put your hand in there for a little while what's gonna happen what's gonna happen to your hand in that situation oh yeah your hand would start to blister immediately and if you left it in pure sulfuric acid for long enough it will completely eat away your flesh it's it's going to eat you away it might take a little while although it's gonna hurt immediately but yeah you're you're gonna if you stay if you have swam and a pool of sulfuric acid you will turn into a skeleton and I am I'm not as sulfuric acid expert I'm not sure if it will eat away at your boat it probably eats away at your bones too so uh do you want to hang out in those clouds no and here's another thing is they know what a fog is does anyone know what fog is what's a fog fog is clouds near the ground that's correct if fog is clouds and the clouds on on Venus are made of sulfuric acid what is the fog that you might sometimes have to walk around with it in on Venus made out of yep the fog itself is made out of sulfuric acid also so why do we never send anybody to Venus because it is a terrible place there's acid everywhere it's superhot the air itself can crush your body it's just that we're never gonna send people to Venus and I think that's kind of funny because Venus is named after one of the Roman gods just like all of the other planets does anybody know what Venus is the god of in Roman mythology here's a hint I think you guys can figure it out yeah the hint was that the Greek name was Aphrodite and it's the goddess of love and beauty so based on that a lot of people before we knew what the surface of Venus was like some people thought that Venus was going to be a tropical paradise planet why else would we name it the goddess of beauty is this a tropical paradise planet no no it's not it's not a tropical paradise planet it is the exact opposite of a tropical paradise planet it essentially is a Hell planet right it's it's like a cartoon Bugs Bunny version of Hell okay there's volcanoes everywhere it's super hot there's acid everywhere you die just from being there you would die before it long before you hit the ground okay the pressure would be enough to destroy your body over a mile above the surface just please don't visit Venus