Food Questions

• How does a microwave oven heat up food even though it emits no thermal radiation?
• How does ice cream in your stomach cause a headache?
• How long can you wait after dropping food on the ground to eat it without having germs attached? Some say it's a five-second rule, others say ten.
• What part of China do fortune cookies come from?
• What part of France invented French toast?
• What part of Germany does German chocolate cake come from?
• Why are refried beans cooked twice?
• Why are the microwaves in a microwave oven tuned to water?
• Why can only certain parts of the tongue taste sweet flavors? Is there an evolutionary benefit to this?
• Why do humans crave sugary foods? Shouldn't evolution lead us to crave healthy foods?
• Why does chewing gum take seven years to digest?
• Why does chocolate cause acne?