SIGGRAPH 99's keynote speaker, Helaman Ferguson, reported on his "neolithic" adventures: communicating the beauty and power of art and science by carving theorems in stone and bronze with computer graphics and interactive techniques.   SIGGRAPH also presented two awards:   Anthony D. DeRose, Pixar Animation Studios, received the 1999 Computer Graphics Achievement Award.   James F. Blinn, Microsoft Research, received the 1999 Steven Anson Coons Award for Outstanding Creative Contributions to Computer Graphics.