This subreddit is continually amazing me with good questions I'd never have thought to ask and with the depth and sheer variety of knowledge our users have. For this week, I was impressed with /u/verdatum turning up with the history of welding, which was pretty interesting.

/u/AlotOfReading did a great job explaining why comparisons between European religious traditions and Pueblo cosmology are difficult, before explaining some of the specifics of Hopi Oraibi spiritual practice in this post. Love the new New World flairs kicking some butt.

I really enjoyed the thread on the history of why blue inks are considered acceptable in formal settings. The short answer seems to be that the Iron-Gall inks that were widely used prior to the 19th century, sometimes turned a very dark blue color, rather than black, as they aged and oxidized.

I really appreciated the discussion of [Japanese tanks in the Pacific] (http://www.reddit.com/r/AskHistorians/comments/2h0957/how_common_was_tank_to_tank_combat_in_the_pacific/cko8jjo) theater by /u/kieslowskifan.

I've seen some of the burned and now very rusted out tank wrecks in the Pacific, so it was great to see such a detailed explanation of when they were used and why. I've never spent much time looking at the details of WW2- my research is mostly earlier, so it was great to learn something new and see a couple book recommendations if I ever have to free time to look up some more.

Am I missing something, or did the date on these get messed up? Shouldn't it be a reflection of the previous week (Sep. 14-20), not the current week (Sep. 21-27)? Or did this get changed without me realising it?

I liked /u/lngwstksgk's answer on the history of Scottish nationalism, especially the bit about the Corries.