karma and destiny

Are our problems due to past Karma or present Karma? – Chaitanya Charan

Does destiny determine whether a child will live till forty or also what will happen to him at that age?

Is everything in life pre-determined?

Why did Krishna allow the desecration of Deities by foreign invaders in medieval times?

When children of same parents such as Ravana and Vibhishana have the same DNA why are their characters so different (Hindi)?