I love looking at mass effect timelines and putting it into a human perspective.
Example, Aria T’loak arrived at Omega when Jack the ripper was tormenting London.
Another example, the Krogan rebellions ended just before the viking period.
Samara realised that her daughter were Ardat-Yakshi during the same decade as Carl von Linné published his Philosophia Botanica.
Henry IV of England lived in the same time as the drell started noticing how their industrial rampage had really damaged their planet.
The first sighting of the collectors happened the same century as William Shakespear’s “A midsummer night’s dream” was performed for the first time.
The asari discovered the citadel when the ancient greeks started to colonize other islands.