Lone gamer
I enjoy me some video games, but I feel like I might be the only gamer on earth who doesn't play well with others.  A major selling point of many modern video games is that there's a huge online community where you can link up with other gamers and play with or against them.  Many people do this and enjoy it.  I do not.  I don't like people, and I don't like playing games with people.  I'm a sore loser, and that doesn't appear to be changing as I get older.  So I'll continue sitting on my couch, playing my non-networked video game console by myself, and enjoying it.  Thpbdpbdth.

Look good, feel good
I'm coming around to the idea that looking good can lead to feeling good. 

A friend bought an expensive pair of Nike golf shorts, and I asked him if they made him any better at golf.  His reply was that he looked better, so it felt like he was playing better.  Kind of a joke, but also kind of true.

Workout clothes are the same way.  Sometimes the prospect of looking good in your new workout clothes will make you want to work out.  As trivial as that is, I say use it to your advantage.  If you want to work out more, buy new clothes.

Seeing atoms
I learned recently that the reason an atom can't be seen with a typical microscope is because the diameter of an atom is around 0.5 nm, while the wavelength of visible light is more like 500 nm.  Light waves (and all other waves) won't reflect off anything that's too much smaller than their wavelength, so light simply passes around an atom.  That's why different regions of the electromagnetic spectrum must be used to sense incredibly small things like atoms.

Air forces
I learned recently that the world's largest air force is the United States Air Force, with 5484 aircraft.  The world's second largest air force is the United States Navy, with 3700 aircraft.  The next largest force is Russia's, with about 1900 aircraft. 

On a related note, I once heard someone say the Navy has its own air force and its own army (the Marine Corps).  And in reference to the Marines' purchase of aircraft, an Army officer was quoted as saying, "Why does the Navy's army need its own air force?"