Unlike the spiral arms, where stars are still actively being born, all the blue stars in the bar are long dead, exploded, leaving behind billions of lower mass, redder stars.
And that means, you know, which parts of the genome are kind of unwound at any given time during development or different environments and sort of active for gene expression versus being very closed and basically inert.
By the way, throughout Europe, pickpockets are hard at work on the buses and trolleys most popular and crowded with tourists, so enjoy the ride, but keep an eye on your belongings.
And I'm not saying this is the same thing, but I'm saying it's a model of some reasons that these are objects which could have been very actively used during an individual's lifetime.
I have been on the Internet pretty actively for the last five years, so I'm sure I've said many stupid things and they'll probably hurt me years from now.