Premise: Experimenting on a raft anchored on the river Elbe, Alfred Nobel tries to make nitroglycerine safer to handle. Finds that the addition of kieselguhr turns nitroglycerine into a dough that can be kneaded, and calls it "dynamite".
Hypothesis: Experimenting with explosives is best done when safety is considered and the location is in an area separated from people and things that can be damaged.