What are spectra? Wouldn’t you like to know? You may have heard of them as somehow determining reduced cohomology theories. You may not have heard of them as a homotopy theorist’s “abelian groups.” In either case, be prepared to be amazed. In this talk, you will be given a definition of what they are. In this talk, you may learn another definition of what they are. In this talk, there is hope that you might be told why they matter. Exclusively in Math 350 this Wednesday at 5pm, come see the spectacle of… Spectra!