Another area where Vedic religion hits the scientific mark is the effects of chanting, specifically the Mahamantra,

Effects of Spiritual Mantram Repetition on HIV Outcomes: A Randomized Controlled Trial
http://link.springer.com/article/10....9063-6?LI=true

Actual mantram practice measured by wrist counters was inversely associated with non-HIV related intrusive thoughts and positively associated with quality of life


Examining the Effects of Meditation Techniques on Psychosocial Functioning
http://rsw.sagepub.com/content/13/1/27.short

Conclusions: The authors suggest that the maha mantra has potential in addressing problems related to stress and depression and that it be considered as one possible component of a spiritual approach to social work practice.
This of course does not answer the age-old questions about providing the ultimate truth, but it does start to find there are truths in the Dharma.