"If you happen to have a box of spaghetti in your pantry, try this experiment: Pull out a single spaghetti stick and hold it at both ends. Now bend it until it breaks. How many fragments did you make? If the answer is three or more, pull out another stick and try again. Can you break the noodle in two? If not, you're in very good company." From:
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It turns out that physicist Richard Feynman spent an evening breaking spaghetti sticks. Guys at MIT figured out why Feynman couldn't break it into two pieces. They also found a way to do it.