ThePrintPod: Aryabhata to Gaganyaan, S-400 & nuclear energy — India’s age-old ties with Russia run deep

Majority of Indian defence equipment is currently of Soviet or Russian make, and, in scientific fields, the collaboration has included space physics and aerospace. 

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https://theprint.in/science/aryabhata-to-gaganyaan-s-400-nuclear-energy-indias-age-old-ties-with-russia-run-deep/861611/