forms quarts / flies forming occurs over a frequency of 300000000 age which is considered a very long space to a mankind
century is years. if hydroplane occurs then glide occurs. century is time_period. infancy is time_of_life. century is 100_years. earth is ball_flies_thru_space. if fly occurs then fly occurs. archery is in_use_fifty_thousand_years_ago. moon's_orbital_period_around_earth is 28_days. if sailplane occurs then fly occurs.