Things we take for granted are all around us and we use them without thinking, things that were discovered or invented sometimes out of necessity, somethings that took many years, somethings overnight, such as...
screw on caps for bottles
electricity...no one really knows how it works!
planes...who understands lift anyway?
stoves or ranges
gas for cooking or for cars
As you can see the list is endless and I haven't touched on the information highway or computers.
What can you add to the list?