How did the imaginary number i = root(-1) come about? Why must it exist? Can we do without it?

Yes, those of us who studied mathematics and physics after high school are familiar with the values $${i = \sqrt{-1}}$$ and ...

Schwab: Our healthcare is at the mercy of an irrational system

Here’s reason number 48, which is one past 47, why America needs to join the rest of the civilized world and provide ...