Fungi are all around us, with mycelium stretching and branching to places we can't even see. Some fungi ooze a blood-like sap or look like colorful coral. Others connect trees, capture pollutants, or become building materials. While some are toxic, others are critical to making certain breads, cheeses, or medicinesCand some are tasty all on their own. It3s estimated that just 10 percent of fungi have been discovered. From the most well-known mushrooms to the mycelium hidden beneath our feet, this in-depth text digs deep into the incredible fungal world.