0
Anonymous
100 years
Domenico Schumm ∙
There are 1 trillion years in 1 trillion years!
1 billion years.
1 decade = 10 years
1 century = 100 years :D
1 decade equals 10 years.
Thirteen years.
20 years
about 1.9 years
1 million years
250 years.
3 years