Alright then...I couldn't figure out where to put this, and tried searching for the topic, so my apologies if my search-fu is weak.
I've been thinking a lot lately about time. Not time as a human construct, and the notation we apply to it...I think we all 'get' that.
My question is...what is time really? We can define energy, matter, etc...but time is kind of swinging in the breeze. Is time like pornography...hard to explain, but you know it when you see it?
So, with scientific theories floating about, using time as a variable...how is it truely defined? Can time be altered, sped up...slowed down...or is just our perception of time as we've been trained to keep track of?
Again...sorry if this has been beaten to death in the past...but I've been so preoccupied with "time", that I'm starting to dream about it.