Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Painted lady ...

Swarms of any other insect might provoke fears of a coming apocalypse, but clouds of butterflies migrating through Southern California are captivating onlookers who are relishing the otherworldly ...

Large polychrome tauroctony relief of Mithras killing a bull, originally from the mithraeum of S. Stefano Rotondo, dating to the end of the 3rd century CE. Now at the Baths of Diocletian Museum, Rome ...