The fundamental rule of both chemistry labs and kitchens: curiosity might kill more than just the cat! Unlike your grandma's cookie dough, those colorful liquids bubbling in beakers contain compounds that could dissolve your taste buds faster than strong acid dissolves... well, everything. Chemistry lab safety rule #1 exists because someone, somewhere, actually thought "hmm, this mercury compound looks delicious!" The history of chemistry is basically a timeline of brilliant scientists discovering things by accidentally poisoning themselves. Marie Curie didn't glow because of her sparkling personality!