Where did Isaac Newton discover calculus?

Answer 1

I presume in the notes belonging to the German mathematician Gottfried Liebnitz!

First, some aspects of calculus predate Newton (and Liebnitz) by centuries. Aristotle, for example, estimated the value of pi by calculating the perimeters of regular polygons inside and outside a circle. The two perimeters bracketed the circumference of the circle. By increasing the number of sides the perimeters of these he got two convergent series: one from below and one above. Perfect method. Unfortunately he could not continue his calculations beyond a 96 sided polygon.

Newton was in Cambridge (UK) when he and Liebnitz, independently published their work of calculus.