Refurio AnachroThe 15. and latest type of pentagonal tile to tesselate the plane was found in 2015 by *Mann*, *McLeod*, and *Von Derau*. So, when I attempted to guess which one it was, my eye was drawn to...
What would you say?
part 1, read on...
Number 10! It was the grey one, far right in the middle row. This cool beast was found by *Richard E. James III* in 1975... Not quite the most recent one. But what a beauty!
If you still want to guess, stop reading now!
You can find out a lot more about all of them here:
https://en.wikipedia.org/wiki/Pentagonal_tiling
part 2, read on...