The fast food landscape has gone through many changes over the decades; here are 7 fast food chains that have changed completely since they first opened.

Here's where beloved brands like Dunkin', Taco Bell and Chick-fil-A stand, according to Intouch Insight, a company that has been tracking the speed and accuracy of fast-food drive-thrus for 25 years.

Fast food dominates takeout choices for Americans, with 60% of people saying it is their preferred option for ordering meals that are eaten at home, new research reveals.