What I find really curious is that how, at every decade, we were living in "modern" times. We were living in "modern times" in 1950's, in the 1970's, in the 90's and now in 2015. It means that we are living in "recent times" with "recent discoveries", but does it mean anything?

Other thing I have found curious is when people ask things like, "Ghosts? Do you believe ghosts in 2015?", no really, what do we know about ghosts not existing, in 2015 that we don't know in 1900? It is as if people assume that, since we have been searching for things like this for 100s of years, and we haven't found them, they should not exist at all. People seem to assume that we are standing in a room where we can see the bounding walls, when in reality we are standing in a mist with very limited visibility and we have no idea where the walls are...

Periods like 'a year' is just an arbitrary time span. It which is big from human perspective. A 100 year span is big in terms of human existence. It might be a blink of an eye for another being which experience time differently. So I think It is a fallacy to attribute such time periods some kind of absolute size, and make assumptions on that basis..