[theoldmarine]

The ‘era’? The era/period is determined by the fossils located therein. The fossils are dated by the geological strata the are found in... Science? Looks like one of the ants we just killed in our front yard here in Florida. I thought it was summer, but it must be the cretaceous period!

[SunLakesJeff]

Looks like one of the ants we just killed in our front yard here in Florida

You are likely correct, but just imagine all of the variations upon what was already an intrepid design.

Also return what "micros" such an intrepid arachnid (???) returns over generations. I apologize for Dating Era Error.

[SunkenCiv]

Or, you could read about the difference between the ant in the Burmese amber, instead of taking your turn bashing a science article on FR.