How is it that a Museum can have 1,200+ fossils of a particular species in its collection since the 1960's... and not even know what it is? For decades, it was thought the 'Tully monster' -- a bizarre animal that lived 307 million years ago -- was an invertebrate, like a kind of worm. But in March, Field Museum scientists helped finally crack the mystery of the monster, to reveal it's actually related to lamprey fish. BOOM.
