Innovations

123456
Across
  1. 4. Mesopotamians were the first to use this alloy, and it is used today in coins.
  2. 5. The first law made by humans. There are 282 of these laws.
  3. 6. A numerical system with 60 as a base. A modified version is still used to measure time to this day.
Down
  1. 1. The first writing system, made out of symbols that meant specific things instead of letters representing sounds.
  2. 2. A basic device used in other technology to this day.
  3. 3. Curved, symmetrical buildings usually made as support.