3. What is the ultimate end of following Hinduism??
Every one claims that their religion is scientifically proven, Ever listen to Dr. Zakir Naik according to him fetal heart beat is explained in the Koran.
Hinduism being a polytheistic religion is able to adopt to the current political, social, scientific and cultural situation of the time, this should not be confused for "scientific proof" for example Christians find evolution hard to believe because their theory is that we came from Adam and eve hindus on the other hand believe in many ways on how humans originated, so when a scientifically sound theory comes along Hindu's are more likely to accept it because within the religion itself there is diversity of thought
And to your question there is no end game of HInduism, in other words there is no clear narrative for Hindu's. This is the reason why there can't be scientific proof of anything as proving something would mean that you have to clearly define what you are proving and defining Hinduism as a whole is extremely difficult