In this issue, we journey back to 17th century Italy to meet Bonaventura Cavalieri, the visionary who sliced geometry into “indivisibles” and laid stepping stones toward integral calculus. We climb algebraic towers built from sums of powers, navigate geometric landscapes bounded by elegant inequalities, and test the limits, quite literally, of functions behaving strangely near a single point. In the playground of combinatorics, we join five friends weaving red and blue threads between them, careful never to stitch a monochromatic triangle. From historical ingenuity to modern puzzles, this issue celebrates the enduring playfulness and depth of mathematical thought.