Your point was that man can climb/descend up to 12km without oxygen assistance.
You've also said that the drill at the Kola Superdeep can't penetrate further than 12km due to the rock.
You're wrong on both points unless you can provide a link to say otherwise.
At this moment in time, you're still on 0 points.
I dont know how to do links and things ,but i will find out and try and post a link