Think of bacteria as tiny, squishy balloons. Boiling water pops them. The heat messes with their cell walls and DNA—poof, they’re gone.
But not all bacteria are wimps. Some form spores. These are like microscopic sleeping bags. Spores can survive boiling for hours.
Clostridium botulinum? That guy’s a champion spore-former. He causes botulism. You need 250°F (121°C) to kill him—that’s a pressure cooker’s job, not a pot of water. Ordinary boiling doesn’t touch him.