I recently accepted a job after interviewing at several places for about a month. The only job I heard back from was the one I was offered. I'm just curious about what happened with the other jobs and why I never heard back. Has this happened to anyone else or is it just me?

Happens all the time.

This is normal, if they do not offer you a job, they do not contact you. I do not believe I have ever been called and told I did not get a job.