Get ready for some smiles! We’re looking at the science of two things that bring us joy: tickles and cuteness.

We’ll explain why tickles make us giggle and why you can’t tickle yourself. Then we’ll talk about what makes cute things cute and why sometimes we want to eat or smoosh cute things.

Plus, a super cute Mystery Sound and a Moment of Um answering the question: “Can a moon have a moon?”

This episode is sponsored by iD Tech (idtech.com/brains). You can support the show at brainson.org/fans