Answers

2016-03-11T13:42:57+05:30
1- By seeing the inner portion of trees which are circle type we can know
2- By analyzing the fossils
2 5 2
2016-03-12T12:24:08+05:30
Radio carbon dating or we can say it is carbon - 14 dating in case of animals.

In trees we can calculate it by seeing the number of rings by cutting the stem part horizontally
0