Facts:
- Ingenuity -
- Statistically a cave is the longest lasting home mankind has ever made -
- The average life span of a conventional building (masonry/ wood) is about 120 years, for reinforced concrete and glass it is half of that at 60 years -
- At 185 meters high and 2,309 meters long, the Three Gorges Dam on China's Yangtze River is the worlds largest concrete structure -