For top Indian Space Research Organisation (Isro) scientists, it has been a tradition to visit Tirupati temple before any major launch. It has been no different in the run-up to the launch of the Mars Orbiter Mission on Tuesday. Isro chairman Dr K Radhakrishnan visited Tirupati on Sunday to seek blessings for the successful launch. Former Isro chairman G Madhavan Nair on Monday said, “This has been a tradition. I had also gone to Tirupati before the Chandrayaan mission.” But more than religious...