Units of time
From what I read, the Hindu cosmolgy has units for time measurement from the smallest (comparable to lifespan of some subatomic particles) to the largest (life cycle of the universe). The smallest unit is, 3x10-8 (one 300 millionth of a) second. One of the longest is a day of Brahma, 8.5 Billion years. There are vedic texts that explain Brahma days, Brahma years and centuries and after how many Brahma centuries the universe is destroyed and recreated (once every 3.5 trillion human years). I am no way an expert in this, there are several websites with more details, this one for example: Hindu Cosmology.
I have read a couple of books by Graham Hancock that suggest the Indian civilization is one of the most ancient civilizations in the world, and that parts of the vedic texts could date to over 10 thousand years old.
I think it is fascinating. I also think it is time that the europeans stop trying to act like they are the root of all humanity. :) (even tho I am european myself.)
The book I was reading is called Underworld by Graham Hancock.