Dive back in time to explore what lurked beneath the surface at the newest exhibit in Portland—Monsters of the Abyss: Aquatic Predators Past + Present. Meet massive mosasaurs, a spine-chilling Spinosaurus, and bizarre creatures as you travel through millions of years, witnessing the rise and fall of Earth’s most awe-inspiring aquatic creatures as well as their present-day descendants.

Museum admission is free on the first Thursday of every month from 10 am to 7 pm, and programs at the Tomorrow Theater in Southeast Portland are free.