User blog comment:Cory Jaynes/Reapers origins/@comment-903543-20110805041231/@comment-1900300-20110805062328

Who's to say? Well Liara is a good start. She was the one who said another civilization existed before the rise of the Protheans. And the Reapers are known to return every 50,000 years, so the Prothean civilazation cant have really picked up untill after the last one died. After all, the Reapers wipe out any advance race, but leave undeveloped races fine. the decendance of humanity were alive back then, but they ignored us. If the Protheans had advanced to the point 37 million years ago that the Reapers took interest in them, then why were they still around for the next millions of years? the Reapers wipe out any species that they seek to assimilate, so the Protheans clearly only came into prominence enough to warrent making a Reaper out of them in the last Reaper attack 50,000 years ago. If they were a prominent civilization before that then they would have been wiped out already.