User:Abyssal/Prehistory of North America/DYK/22

... that Yaxha, the third largest Maya ruin in Guatemala, is one of very few Maya cities to have built a twin pyramid complex, an architectural arrangement characteristic of Tikal?
... that the extinct Lotus Nelumbo aureavallis is known from Eocene rocks in western North Dakota?
... that three Adena burial mounds (one pictured) are scattered around the village of Zaleski, Ohio?
... that cycloids are believed to have been driven to extinction when crabs spread across their territory?
... that the extinct Cuban condor Gymnogyps varonai may have fed on ground sloths?

... that seeds of the extinct tree Eucommia montana are found from British Columbia to Colorado?
... that Mill Creek chert was one of the major exported raw materials of the Mississippian culture?
... that the only known specimen of the early crocodile relative Stegomosuchus was kept in the discoverer's yard for several years before being given over for study?
... that the king of gore and the monstrous murderer lived in Utah 80 and 75 million years ago respectively?
... that the extinct paddlefish Paleopsephurus was first described from the Cretaceous Hell Creek Formation?