I'll see if I can find the study, I think I read it in google books.
Yes I can see the stars there in night there. Now that you mentioned it, I want to go away from artificial lights and watch the night sky hehe. It snowed yesterday so winter is here I guess.
Yes caffeine is bonded with catechins in Guarana, this makes it sort of time-release. Combined with coffee it made me a bit overstimulated though, so I went out for a run. For some reason guarana tends to be perhaps the most stimulating source of caffeine for me, not sure why this is. Some of those catechins work as MAOB-inhibitors I believe but that shouldn't cause such a stim effect. Maybe there is a COMT-inhibitor compound or something? I might have to look into this more.
It's interesting that the active ingredient caffeine should be pretty much the same, yet something like Yerba Mate never gets my heart racing or anything but is a rather cheerful stimulant.