I heartily endorse this podcast

99% Invisible is very good, available wherever podcasts are sold.  Some favorites:

• "He's Still Neutral" - (link)
• "Life and Death in Singapore" - (link)
• "From Bombay With Love" - (link)
• "The Many Deaths of a Painting" - (link)
• "The Secret Lives of Color" - (link)

 

 That last one is about the 2017 book of the same name, which is winging its way to my mailbox as we speak.