More beautiful pictures can be found at his homepage or in his book.
Umbilic Torus NC, bronze, 27".
Jaime Escalante Award, silicon bronze, 8".
Figure-8 Esker on Double Torus, alabaster, 6".
Thurston's Hyperbolic Knotted Wye 1, marble, 13",
That is how some of these sculptures get made:
Stewart Suspension for Drill