Dear Twitpic Community thank you for all the wonderful photos you have taken over the years. We have now placed Twitpic in an archived state.
With the recent publiion of PHYSICS IS... there are now three Ask the Physicist books! Click on the book images below for information on the content of the books and for information on ordering.
1. Hebrew and Sumerian >Is Hebrew a daughter language of Sumerian? No. Hebrew belongs to the AfroAsiatic language family. Sumerian is a different language family.
TECHNOLOGY LEVELS A useful concept in science fiction gaming is the technology level (or "tech level"), denoting what a given world or .
"Demandite" is the word used by mineral economists to describe the materials that must be provided— usually by mining— to meet the needs of civilization.