Because the Cardinals could not reach a majority in favor of one man.
The longest interregnum followed the death of Clement IV in November 29 of 1268 and did not end until September 1 of 1271 with the election of Pope Gregory X. This prompted Gregory to declare that in future conclaves the cardinals would be locked away until a pope was chosen.
2/3 of the cardinals participating in a conclave must vote for a particular candidate for him to be chosen as pope. In the conclave of March 2013, that number was 77.
20 years longest tree snake years and 3 months
Grass snakes are really annoying and like to eat pieces of animal droppings, especially those of the adder. It lives about 2,000,000 years and take their shed skin with them for all these years!
The cardinal who receives 2/3 of the votes in the conclave is considered the pope unless he refuses the position.
Normally it's expected to be 3 - 5 years, but they can live for longer (7 years is the longest I know of offhand).
Round Valley, AZ. two years undefeated. lost 3 games in 4 years.
2-3 years sometimes up to 4 and 5 is the longest amount of time a horse has ever grown
At least 3 but it could take upto6 years.
3 years
3 years ?
Any of the digital atomic clocks have a battery life ranging from 2-3 years.