This week I learned the best way to cool your mouth after eating a hot pepper, and more

Read more about the facts mentioned:

The science of why we kiss (Brain Pickings)

The first kiss in cinema, 1896 (Brain Pickings)

This guy tested 7 ways of cooling down chile heat — and lived to tell the tale (Bon Appétit)

11 facts about the Iditarod (Mental Floss)

IBM's Watson sets the menu at SXSW (Gizmag)

Listen to more audio explainers:

• Why is America's internet so slow?
• Why states should stop limiting the alcohol content in your beer
• This week I learned that plants are now making complex decisions, and more

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