The two may remain in copulation for extended periods of time. It can survive at temperatures as low as for short periods of time. They close during holidays and the university exam periods. The present surface is a combination of layers created during various time periods. Transitions in religious traditions over such long periods of time may make some strange turns. Archaeological evidence is particularly important for understanding these early periods. It progressed during the Indian sultanate and mughal periods. I'm just blessed at being able to be loud for long periods of time. The society is polygynous with copulation resulting from scramble competition during reproductive periods. Sometimes publishers will commission series of historical novels that explore different periods and times. Most Czech loanwords originated in one of two time periods. Lead tends to oxidize if stored for long periods. Gauges ignore variations caused by waves with periods shorter than minutes. There are fifteen moon dates for each of the waxing and waning periods. North America is the source of much of what humanity knows about geologic time periods.