What is the shortest era?

Related questions

1. What is Aeon Big?
2. What does the name Eion mean?
3. What is the current period?
4. What are the 3 eons?
5. What is the oldest era?
6. How long does an eon last?
7. What are the 4 eras from oldest to youngest?
8. Is Owen an Irish name?
9. Did Vikings invade Scotland?
10. What EON are we currently in?

Tags

1. #paleozoic
2. #oxygen
3. #shortest
4. #longest
5. #oldest
6. #mesozoic
7. #start
8. #precambrian
9. #cenozoic