When I removed all the debries I discovered that the computer had also been damaged, at least it lost power connection when the heavy bookshelf crashed on it (white large box). On its temp-file time stamp I could retriev the time point when the accident happend. It was exactly 11 minutes after I left the institute. So a few minutes later, maybe another 15 minutes more thinking in a relaxed position about the risk of cosmic debris, and I would have fallen on the office field of honour.
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Venn diagrams are tools to summarize in a graphical manner the results of a multifactorial analysis. Outside proper number theory in mathematics, however, they are usually more confusing than elucidating. Actually, I hate them, because people in life-science use them mainly to show how much work they did (but not how much intelligent thoughts they invested).
Here I'd like to suggest (and of course claim trademark ownership for) a couple of special cases of Venn diagrams
The Solar Eclipse diagram
(2 sets with 1 shared set)
The Krupp diagram
(3 sets with 3 shared sets in pairs and 1 shared set for all)
The Audi diagram
(4 sets with 3 pairwise shared sets)
The Olympic diagram
5 main set
7 pairwise shared sets in the overlap between
3 subsets shared by 3 sets in the overlap between - blue-black-yellow
You might call this scientific brain drain, but I rather consider it the competition of the brightest brains for the best possible places in the world to do research. I do every year a two-weeks summer school on "Molecular Mechanisms of Radiation Carcinogenesis", which over the last ten years or so attracted more and more students from all over the world. This years class had participants from China, India, Iran, Turkey, Romania, Serbia, Sweden, Germany, Nigeria, Ghana and the US (please note I listed the countries in the order of the rising sun, i.e. from the farest east to the farest west).
I have to say that they were all extremely commited to the lectures they heared here, and since they returned to they home institutions or continue their PhD projects anywhere else, it is not a brain drain from the poorer to the richer hemisphere of the world, but rather the spreading of scientific knowledge.
I strongly believe that anything that mankind has discovered or created should be available for no costs to everyone, because only this way this and all future generations can profit from scientific discoveries. But I not only want to advocate a world-wide benefit from the discoveries of a few brilliant researchers (such as Harald zur Hausen or Emmanuelle Charpentier), but I strongly believe that an unlimitted access to the creative pool of the whole world will speed up and nourish any further progress, be it scientifically, technical or cultural.