Great problems
Prime territory : Goldbach Conjecture
The puzzle of pi : squaring the circle
Mapmaking mysteries : Four Color theorem
Sphereful symmetry : Kepler Conjecture
New solutions for old : Mordell Conjecture
Inadequate margins : Fermat's Last Theorem
Orbital chaos : Three-body problem
Patterns in prime : Riemann Hypothesis
What shape is a sphere? : Poincaré Conjecture
They can't all be easy : P/NP problem
Fluid thinking : Navier-Stokes Equation
Quantum conundrum : Mass Gap Hypothesis
Diophantine dreams : Birch-Swinnerton-Dyer Conjecture
Complex cycles : Hodge Conjecture
Where next?
Twelve for the future.