I'd chuck 'em; especially if their creation date is well in the past. If I was bored enough and had the time/ inclination I might look at their creation dates and see if I could correlate them with some problem I had with my system around that time; ie. an application or system crash, or reported error from the OS.
It is binary / hex, not ASCII text, so text editor won't see anything interesting. You can download a hex editor and then search for some keyword if you want some fun, but it is just what was in the RAM when you crashed.