Celebrate 450 million years of flora and fauna built by the hands of hundreds of modern humans and currently installed in the Providence Public Library stairwell. As a raucous and thoughtful alternative to Tax Day, come out for an afternoon of organism appreciation, land acknowledgment, poetry, music, “crabaoke,” and crafting in homage to the enduring horseshoe crab and their primordial friends.This event is free and open to the public. Registration is appreciated, but not required.