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I am not sad for my gender, i am just sad for women who never meet a man who would respect her.
He takes extra fuel for the landing - this means he can only launch a lighter cargo, but he can one day reuse his rocket again, so it is worth it.
The last Falcon 9 flight http://en.wikipedia.org/wiki/S... did not attempt a landing because it took a cargo of 2,216 kilograms (4,885 lb). The last flight which attempted a landing http://en.wikipedia.org/wiki/F..., only had 1000 kg payload.
The http://en.wikipedia.org/wiki/F... will be able to lift up to 53,000 kg and land again because it is 3 Falcon-9s strapped together.
Life is definitely better than 100 years ago - people have better human rights, more food, better health, smaller families, and increased longevity - also in the developing world. And I think 100 years from now it can get even better, especially if renewable energy democratizes energy sources - removing the source of most global conflict of the last century, if people can get their (probably lower than today) energy needs sourced form their own creativity and ingenuity, rather than drinking energy from the corporate hosepipe as a mindless, paying consumer.
You can sit back smugly and wait for the millions of refugees to descend on Europe from Subsaharan Africa and Central/Southern America as their homelands become more arid, driving them north, or watch as global fishery catches dive because of eutrophication and ocean acidification.
This is no fiction - already these are burning issues in America and EU this year.
Forget your apocalyptic scenarios - there have been many environmental problems of the past that we fixed because they made people sick, and now we need to fix the environmental problems that are making people hungry and killing sealife.
Westen Society has done IMMENSE damage to the planet,eg http://en.wikipedia.org/wiki/G..., , and we need to keep finding, preventing and fixing these problems.
When talking about fracking, people almost always IGNORE the fact that they are pumping masses of http://en.wikipedia.org/wiki/L... into the ground, without taking responsibility for the consequences. Be assured that the next few generations will be cursing yours for that and filling the earth's orbital space with 300,000+ pieces of junk http://en.wikipedia.org/wiki/S....
There is no "business as usual", we all need to be acting responsibly for our own health and others.
If you now apply this to Dark Matter and ASSUME that the Dark Matter in our part of the galaxy is evenly distributed then its gravitation effect upon is is effectively zero (or insignificant in terms of the Sun's effect on us). That is why we are unlikely to be able to measure local Dark Matter's effect on us, it is better to look outside of a Galaxy where it is less "spherical" or comparable to baryonic matter's influence
Also, since the baryonic matter INSIDE our solar system has MANY ORDERS OF MAGNITUDE of density higher than the Dark Matter INSIDE our solar system, Dark Matter is completely irrelevant for the orbits of solar planets, moons, etc..