A redditor asked fellow netizens what is a simple concept from their field of study others don’t seem to understand, and they covered plenty, ranging from communication to meteorology.

A redditor asked fellow netizens what is a simple concept from their field of study others don’t seem to understand, and they covered plenty, ranging from communication to meteorology.

A Tweeter shared how she, as a kid, misunderstood the idea of an expiration date on her dad's ID and started crying—she thought it was when dad was going to pass away. This inspired loads of stories.

A Tweeter shared how she, as a kid, misunderstood the idea of an expiration date on her dad's ID and started crying—she thought it was when dad was going to pass...