hare krishna and happy balrama purnima !!
in my opinion - dinosauras must be pre-pralaya times but there is no single word about dinosaur or that like big animal description in our scriptures but as there are 84 lakh types how one can write all names in a scripture and who will have interest in reading all 84 lakhs names
there is no aliens like thing..area 51 is extremely secured no one can enter there......i doubt they are making spaceship like things..today's man is making many hoexes like the world will end in 2012,2025........so as like this 'alien' is hoex not a real thing.
maybe my opinion is wrong..
WHAT YOU THINK ABOUT DINOSUARS AND ALIENS ?