Vedanta refers to the 108 Upanishads which are philosophical musings of the Vedas about the Cause of Creation, Being, Cosmos and so on.
Prominent exponents of Vedanta are Shankaracharya and Ramanuja.
In contrast, Charvaka or Lokayata philosophy is a Nastin (Atheist), materialist system, which rejects Shrutis, deities, and even the idea of re-incarnation.
Vaisheshika philosophy has a scientific rather than a metaphysical approach and believes that the world is made up of innumerable but distinct (vishesha) particles.
Nyaya is a complementary philosophy trying to arrive at `nyaya' or knowledge, which is `just', or `right'.
Bhagavat-Gita, a part of the epic Mahabharata, expounds the synthesis of three yogas or ways of attaining union with the Supreme Self, Gyana-yoga (union through knowledge), Bhakti-yoga (union through devotion) and Karma-yoga (union through action).
They continue to decay going through various transitional states until they finally reach stability. It will spontaneously decay until it transitions into Lead-206 (Pb206).
The Vedas are called Shruti or `that which is heard' and are regarded as revelations to sages passed down orally to disciples and students.Drawing any conclusions from the above depends, of course, on actually measuring the rate at which helium leaks out of zircons. The consistent answer: the helium does indeed seep out quickly over a wide range of temperatures.This is what one of the recent RATE  papers reports on. In fact, the results show that because of all the helium still in the zircons, these crystals (and since this is Precambrian basement granite, by implication the whole earth) could not be older than between 4,000 and 14,000 years.Here are the three major assumptions for your consideration: Are these foundational assumptions reasonable?Recent findings seem to indicate that though we ourselves have not been able to vary the decay rates by much in the laboratory, the decay rates may have been accelerated in the unobservable past .