Estimated at around 30 years, it's accepted as the average period between birth of parents & their offspring
... With regard to the Old Testament and the time period between Adam 
.... time scales require that the average number of offspring over most of ..... will 
lower the average life expectancy at birth to around 30 years by... [DOC] [TLE] Bald Eagle Nesting & Young - American Bald Eagle Information [PAR] Apr 11, 2016 ...