An appreciation of watches often takes you back in history. That is especially the case when you find yourself asking "what is that for?" A commonly misunderstood feature on some pilot watches is the ...

Jerusalem Post / Science The invention that altered history: The slide rule In 1622, William Oughtred created the first slide rule, a simple and easy-to-use calculation device consisting of two ...

You have that slide rule in the back of the closet. Maybe it was from your college days. Maybe it was your Dad’s. Honestly. Do you know how to use it? Really? All the scales? That’s what we thought.