ζ(½ + it) traced as a parametric curve in ℂ. Zeros: the curve passes through the origin.
Riemann Hypothesis (1859, unproven): all non-trivial zeros of ζ(s) lie on Re(s) = ½.
First zeros (imaginary parts):
t₁ ≈ 14.135
t₂ ≈ 21.022
t₃ ≈ 25.011
t₄ ≈ 30.425
t₅ ≈ 32.935
Computed via Euler-Maclaurin sum: ζ(s) ≈ Σₙ n^{-s} with corrections. The spiral winds around the origin, touching it exactly at each zero.
The functional equation: ζ(s) = 2^s π^{s-1} sin(πs/2) Γ(1-s) ζ(1-s) forces zeros to be symmetric about Re(s)=½.