Quote Originally Posted by a500lbgorilla View Post
Which tool has yielded the greatest amount of physics related discovery?

I mean physical tool like a straight edge, or a telescope not thinking tool like math, or the theory of electromagnetism.
One answer: pen/pencil/chalk/scribe

Basically, the tool which allows ideas to be written down. This opens up the door for longer, more developed ideas and the ability to share ideas with others.

Another answer: lens

It was the use of lenses that allowed Galileo to first observe the sky with a telescope. So many advances in medicine came from understanding the microscopic world.

Yet another answer: computer

Is a computer a single tool or many? Either way, we got all the way to Quantum Mechanics and Theory of Relativity without them. It must be noted that while computers have not been around for very long in the world of physics, they are an essential tool to every modern physicist.

My final answer: the human mind

Bazinga.