Five AGES packed into the grid: STONE age, ICE age, IRON age, etc. This Seattleite was pleased as punch to see the SPACE NEEDLE as a ...
read moreFive AGES packed into the grid: STONE age, ICE age, IRON age, etc. This Seattleite was pleased as punch to see the SPACE NEEDLE as a feature entry! (Although just between you and me, it looks ridiculously tiny in real life. More like the Not-Even-to-the-Clouds Needle.)

I liked the themers Kurt chose. STONEHENGE is a magnificent structure full of mystical meaning, the IRON HORSE is not just the nickname for the railroad engine but one of the greatest sports nicknames of all time. Lou Gehrig's consecutive game streak stood for so many decades before Cal Ripken, Jr. broke it.
I really wanted a chronological progression, though. As I was solving, I enjoyed seeing the puzzle move through the STONE age to the ICE age* to the IRON age to the SPACE age … back to the BRONZE age? It seemed haphazard to me. Again, it's not an absolute essential, but I found the random order to be inelegant. It would be one thing if there were very little flexibility in themer choices, but that's not the case here.
It's amazing how much harder a puzzle is to fill when there's a middle themer sort of splitting the puzzle in two. In this case, IRON HORSE creates big chunks of white space in all four corners. As if that weren't hard enough, there's a revealer to deal with — Kurt does pretty well in that tough lower right corner, the gluey bits just a MES, NUEVO, and ONE A. They're all minor, in my book.
It's too bad though, that there's enough glue spread around in the form of ENNE, ANON, OSS, SOO, etc. that it registered on my radar. Not ideal. I wouldn't have minded CASHIER and ASSORTS broken in two with black squares — would have made for more three-letter words, but those two corners could have been cleaned up for a better overall effect.
Curious to find out that ZOE is a Muppet! I thought I knew them all. Fun clue.
*You might think any college-educated solver would realize the ICE age came before the STONE age, but you'd be wrong.