Nope.  A scientific answer has to be provable.  To answer yes to this, you would have to able to scientific prove that you have scientifically proven EVERYTHING.  Since new things keep coming up and invented/discovered, we will probably never be able to find everything, let alone explain it. 

Hmmm...the experiences of my younger self helped guide me to this point.  I like where I am in life, so I don't think I'd want to change anything major.  I'd probably warn me to check under the couch for underwear before my friend's come over, cuz they find some and its embarrassing. 

Deciding that since I didn't have the computer or Wii to distract me, I should get some cleaning done, so I grabbed the flashlight and the broom and swept.  Its not that memorable, but has a rather perverse irony to me.