What a treasure! This tiny museum has a wild collection of all sorts of fascinating specimens. It's free, and the main hall is lined with the offices of professors who's students come and go as you browse the exhibits.
I got really excited about the artifacts from turn-of-the-century Congo, the ancient Egyptian collection (pottery & other artifacts including several mummies), the amazing minerals, fossils and dino bones. They've got great curiosities too: a giant Japanese spider crab, a shrunken head (with a fun 'is it fake' display), tiny shoes made for Chinese ladies with bound feet, a polar bear hide, and neat taxidermy, like a specimen of the only parrot native to N. America (now extinct).
I spent about two hours in here pouring over every descriptive card, but a more casual visitor could cover the whole place in twenty minutes.