"Complete Meter Stick Optics Bench"

The cave bear lived in Europe from approximately 300000 to 15000 BC.

Belonging to the Pleistocene era, Rancholabrean epoch, the giant beaver became extinct approximately 10000 years ago.

Stegosaurus ungulatus, meaning 'roof lizard', dates from the late jurassic period and was first described by Marsh in 1879 based on bones found in wyoming.