00:00A first view, Venus seems totally hostile to life.
00:04Her surface is quite hot to make fond the plomb.
00:08These clouds are made of sulfurous acid concentrates
00:11which destroy the complex organic molecules.
00:14And the atmospheric pressure is about 92 times higher than on Earth,
00:19quite strong to destroy everything that we consider living.
00:24All this, put out to it, it seems to be a total impasse.
00:27But this conclusion is not as obvious as it seems.
00:31Let's start with the temperature.
00:33Yes, the surface is extreme, but Venus is not uniform.
00:36At about 50 km of altitude, the conditions change a lot.
00:40The temperatures are in below 50 degrees Celsius.
00:44It's still hot, but comparable to a day caniculate in Arizona
00:48or in some parts of India.
00:51Now, the clouds of sulfurous acid are highly corrosive and reactive.
00:57The acid sulfurous acid decompose very quickly
00:59most of the materials and organic materials.
01:01A direct exposure will destroy the family forms.
01:04But the recent results of MIT suggest that the chemistry of these clouds
01:08is perhaps not as limitless as they are.
01:10It's important.
01:27It's important.
01:28It's important.
01:29It's important.
01:29The complex structures are not in the environment.
01:33In clear, the chemistry does not totally exclude the life.
01:38The experiments confirm it.
01:41The organic reactions can be produced in the sulfurous acid,
01:44producing things like the acid aminous and the acid nucleic acid.
01:48The researches more recent go further,
01:50asking if the complex systems of type ADN could exist
01:53in using different blocks of construction molecular.
01:57The structures based on cyclopentane
01:59seem quite stable to serve as a system of genetic genetic system.
02:04Not the ADN as we know,
02:06but something that could play a similar role.
02:09Then, there's pressure.
02:10The Venus surface is located in about 92 bars of CO2.
02:14For better to represent the thing,
02:161 millibar is about the pressure that we feel
02:19in a small piece of money.
02:22But as the pressure is a force
02:24divided on a surface,
02:26at the surface of a human body,
02:28the force becomes enormous.
02:3092 bars,
02:32it would be like millions of kilos
02:33on you.
02:35Modifying such a pressure
02:36would require an engineering at the planet.
02:39There are three main ideas.
02:41First of all,
02:44we have to block a part of the light
02:45of the sun with the big stars orbit
02:47to refroidify the planet,
02:48causing the condensation
02:49or the gas of CO2
02:51and reducing the atmosphere.
02:532.
02:54We have to fix the carbon dioxide
02:56to the carbon dioxide
02:57to react with minerals
02:58like calcium or magnesium.
03:013.
03:03We have to add hydrogen
03:03to convert the CO2
03:05into carbon dioxide.
03:062.
03:119.
03:1210.
03:1511.
03:2012.
03:2012.
03:2110.
03:2416.
03:2416.
03:2416.
03:2616.
03:2616.
03:2716.
03:2920.
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