500s BC (decade)

Significant people

Deaths

How the world looked

gollark: Anyway, the long and short of it is that your bunker was really ineffective as a bunker.
gollark: Oh, and the PotatOS for OpenComputers installation on the main computer makes it more weird-mess-ish.
gollark: And the unlabelled buttons tied to important parts of the security system I stuck on random wall panels.
gollark: Also, the self-destruct function rigged to the dead-man's switch in my base, that's relevant too.
gollark: It's a weird mess, you see, because I secretly dug an extra tunnel network into it.

References

  1. An average of figures from different sources as listed at the US Census Bureau's Historical Estimates of World Population
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