[SunkenCiv]

Stone blocks in excavated dam, Girona, Spain

Sanjurjo-Sánchez et al. 2025, Land

[boatbums]

Some fascinating data about where gold even comes from (hint: it's "star dust")

Where Does Gold Come From

[Paal Gulli]

I had no idea hydraulic mining was that old. I looked it up in Wiki and it says a precursor using natural flooding or a diverted river was described by Pliny the Elder in the 1st Century BC.

[HereInTheHeartland]

“ the Romans extracted gold from alluvial deposits in the Eastern Pyrenees.”

They better have permits