I'm brand new to the GIS community and am trying to wrap my head around the application. I plan on having a career as a wildlife biologist of some sort and I've been told I should be familiar with the program. I downloaded the ArcGIS explorer for desktop but I can't seem to load any maps onto it. Is there something I'm missing? All that appears is a white screen with some arctic cricle, prime meridian etc. I tried to use the Harvard GIS tutorial on how to actually use it but as i stated above I can't open any examples. I unzip the files and replace them into the C drive but it won't even find them when I go to open them. They end dbf i'm not familiar with what that means. If anyone knows what I'm doing wrong or any information that could help me I'd appreciate it.