"India's premier Defence Research of Development Organisation DRDO is open to co-developing a technology promoted by an Indian scientist who claims he can make planes invisible using pre-Mahabharata sage Bharadwaj's formulae, a senior agency official said here Friday......that the formulae for the alloy has been sourced from Bharadwaj's book 'Brihad Viman Shastra' and could make even planes invisible, because it absorbed 80 per cent of the light..."

https://www.news18.com/news/tech/invisible-planes-next-on-drdos-radar-thanks-to-sage-bharadwaj-965965.html

Here's somthing sacred and in abundance

https://www.thestar.com.my/news/in-other-media/2014/10/07/sniffing-cow-dung/