Humans ingest food through their mouth, but some microorganisms work very differently.
Saliva doesn't just help with digestion; it also aids your body's fight against disease and infection.
Have you ever laughed so hard that milk came out your nose?
Although like our mammalian cousins we use teeth to bite and chew food but we're the only animals that brush after every meal.
Did you know that there could be more bacteria living in your mouth than there are people on earth?
What keeps seemingly defenseless grass from hungry grazers?
Why don't tooth-brushing and mouthwash really help? Why makes garlic so persistently stinky?
As soon as they lay their eggs, the female cichlids scoop them up into their mouths and incubate them until they hatch.
Drinking pop all day may not be a healthy habit, but can soda actually rot your teeth?
Learn how to grow your own dentures on this Moment of Science.