Russia's Siberia region has a reputation for being a harsh, cold environment but those conditions have made it invaluable to our understanding of science and history.
As we've discussed several times in recent years, that's because Siberia has proven time and time again to be a place where artifacts from the distant past can be extraordinarily well-preserved for hundreds if not thousands of years.
But long before that became increasingly clear to us, one of the secrets the region once held remained a curiosity for over 100 years. And it's only recently that we've learned just how important it was all along.