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Ask Dr. Universe

Dr. Universe looking through a microscope

Question of the Week

  • If snakes smell with their tongues, what do they do with their noses?

    You’re right, snakes have an amazing sense of smell. They can use their tongues to pick up on all kinds of scents in the air.

    Whenever we smell something in the air, we are actually sniffing tiny building blocks called molecules. These molecules are what make up the scents of everything around us—things like baked bread, fresh-cut grass, and warm cookies.

    If you were a snake, you might sniff out the scent of a slug or mouse. You’d use your tongue to pull the molecules from the air into your mouth.

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