Why do Au Ra females have boobs?

[Rocl]

I think is the age of man what began 10 thousand years ago. But not the birth of the planet.

Hydaelyn was created approximately 20,000 years ago allegedly. However, there's evidences of fossils which some scholars debate must've taken a thousand thousand (aka a million) years to form. So, yeah, I personally imagine Hydaelyn as being millions of years old like any good planet should be, but the smallfolk aren't exactly keen on the science.