Until very early this morning I was unaware that a dirty air filter could render a furnace inoperable. It's hard to believe, I know, but if the filter is full of dirt and grime, the furnace can't pull air efficiently through it and it will just shut down. Now I know.
Until very early this morning, I was completely out of touch with the inner workings of an electric pencil sharpener. Who knew that if the little plastic tab on the tray that holds the shavings breaks off then the sharpener will not turn on? Well, now I know.
Until very early this morning, I had no idea that the air ducts in my house could be harboring as many as three trash bags full of dust and lint. A company can come to my house with an octopus-like vacuum device and suck it all out of there. Good to know.
Until very early this morning I did not know that REI took real impressions of rock faces of popular climbing sites in order to build their in store rock climbing walls. That never even occurred to me, so I am happy to know that.
Until very early this morning I never grasped the fact that if you are on your homemade rock climbing wall in your garage or in your basement, that you don't have a belayer, so if you fall you will probably get hurt. Ok, actually until recently, I had no idea people had rock climbing walls in their garages and basements, but now I know.
Until very early this morning I had always wondered about those people who have a sort of internal clock. I wondered what happens to them when the time changes. Turns out that they are precisely an hour late and wake up thinking about air filters, air ducts, electric pencil sharpeners and rock climbing walls. Now I know. Very, very good to know.