Aliens
Flickr user woodcreeper (now one of a million, congrats Flickr) documents his brain tumor and its removal. Cool photos if you're medically currious, or you want to make your coworker make a crinkly face at your monitor.
Also on the photography front: They found a frozen lake on Mars. From this we may deduce that the invading alien army will have boats.
The Alien [Flickr / woodcreeper]
Lake On Mars [NASA]