- 1 gigayear = 1,000,000,000,000 years.
- 22% of people skip lunch daily.
- The compass and straight edge were powerful tools in the advancement of geometry, allowing the construction of various lengths, angles and geometric shapes..
- Hippopotamuses have skin 3.8cm (1.5in) thick.
- Human thigh bones are stronger than concrete.
reload more facts | visit cool facts
add this widget to your website