Appliance of Science: Why do we burp?

Everybody burps, and in some cultures it is even considered polite to do so after a meal; it is seen as a sign that you have enjoyed your food. But why do we burp? Dr Naomi Lavelle has the answer.

Everybody burps, and in some cultures it is even considered polite to do so after a meal; it is seen as a sign that you have enjoyed your food.But why do we burp, do other animals do it and what would happen if we didn’t? Dr Naomi Lavelle explains.