Mold

fungus · microscopic · nature's recycler

Tiny fungal structures. Molds are fungi that form dust-like, colored structures called spores. These spores are so small you can't see them individually, but when millions gather together, they create the fuzzy patches you see on old bread or damp walls.

Breaking down the world. Molds play a huge role in nature by breaking down dead plants, leaves, and wood. Without molds, all the dead stuff in forests would pile up forever instead of recycling back into soil.

Making medicines. Some molds produce special chemicals that help humans. Penicillin, one of the most important antibiotics doctors use to fight infections, was discovered in a mold growing in a laboratory by accident.

Traveling by air. Mold spreads by releasing spores into the air like tiny seeds. These spores are so light that they float on wind currents and can travel far from where the mold started growing.