Prime Minister Narendra Modi said on Sunday that the start-up culture had in India become very vibrant with youngsters in even smaller cities embracing it, and asserted that it is a sign of India's bright future.In his monthly' Mann ki Baat' radio broadcast, Modi also noted that space sector reforms in the country have caught the people's imagination and expressed confidence that a large number of satellites in the coming days will be developed by youngsters from universities, labs and other sec