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Dynamite
While Nobel was in Paris, he began to experiment with nitroglycerin, and eventually he accidentally found a way to tame the substance by mixing it with kieselguhr -
Chewing gum
Thomas Adams was experimenting with chicle, the sap from a South American tre, he was looking for a substitute for rubber. After many failures, the disappointed inventor was working when he put a piece into his mouth and he liked it! -
The first artificial sweetener
Fahlberg came to the conclusion that the sugariness was caused by the reaction of o-sulfobenzoic acid with phosphorus (V) chloride and ammonia to create saccharin. -
The microwave
He was experimenting by aiming the tube to other items, such as eggs and popcorn grains. He concluded that the microwave energy was affecting the objects.