They’re here! Thousands of Mysterious Purple Spheres Found in Arizona Desert | Helablog The best guess of various experts polled was that it was slime mold or jelly fungus, which wouldn’t seem likely in that climate Other suggest they are a product, like Deco Beads which are small, colored, water-filled balls designed to keep plants hydrated. But who the hell would drive all the way out to the desert and dump them? What do you think they are? Aliens I tell you.