1. 84% of vegetarians eventually go back to eating meat.
2. The appendix may have been used for digesting leaves. This theory is supported by koala and horse appendixes which do just that.
3. "Astronauts" come from America. Space explorers from Russia are called "cosmonauts."
4. The portrayal of CPR on TV has a survival rate of 66% while in a real life hospital it's about 15%.
5. The word 'silly' originally meant blissful or blessed.