Dinosaurs may capture the most attention, but there are all kinds of strange, amazing, and gone animals — ranging from the Wooly Mammoth to giant armadillo Glyptodon —that are just as fascinating. Today, we want to know which one you most would have liked to see.

Tell us in the comments which animal it was, describe it, and tell us why you're so disappointed that you missed each other by a millennia or two. Picture too, please!

Image: Mammoth display, Royal BC Museum / Flying Puffin.