If you have ever wandered through a forest after a storm and spotted something that looked like an egg splitting open, you may have encountered a stinkhorn mushroom. Known scientifically as Phallus impudicus, this unusual fungus has earned a reputation as one of nature’s most startling discoveries. Its appearance and smell have sparked curiosity for centuries.

The stinkhorn begins as a “witch’s egg,” a rubbery orb that cracks open in a single night. From inside, a tall, sponge-textured stalk pushes upward at incredible speed, making it one of the fastest-growing fungi. The sight may be startling, but the odor is what people remember most—a strong smell of decaying meat that attracts flies and beetles. These insects then spread the mushroom’s spores.

Despite their unsettling appearance, stinkhorns are harmless to humans and play a valuable role in the environment. They are saprophytes, breaking down fallen branches and dead leaves to enrich soil and maintain a balanced ecosystem. Their striking shape and slimy cap have led to nicknames like “corpse fungus” and “devil’s egg,” and photos of them often go viral online.

Stinkhorns are not toxic, and some cultures even eat the egg stage, though caution is advised. They challenge our assumptions about what nature should look like, reminding us that forests hold mysteries shaped by evolution and purpose. What seems eerie at first becomes, with understanding, another example of nature’s remarkable variety.