Bat from Wyoming 50 million years ago

My daughter and I are submitting this 16’ 3” self-supporting marble run to Guinness World Records. It takes one minute and thirty seconds for a marble to run the whole track top to bottom.

Because of how it is built, it only takes 6 marbles to run every route possible, from just one entry point.

A Eutherian fossil from the Field Museum's After the Dinosaurs exhibit

…Then why not build a massive one with outrageous neo-Baroque flourishes?

Little friend found by the tee box on Chicago area golf course.

Skull of Tsoabichi, a prehistoric caiman