Shannon tells us how the iconic heart shape originated and Lizz tells us the history of CPR.

SOURCES

https://slate.com/news-and-politics/2007/02/where-does-the-ubiquitous-valentine-s-heart-shape-come-from.html
https://en.wikipedia.org/wiki/Heart_symbol
https://www.history.com/news/what-is-the-origin-of-the-heart-symbol
https://ideas.ted.com/how-did-the-human-heart-become-associated-with-love-and-how-did-it-turn-into-the-shape-we-know-today/
https://threadwritten.com/journal/2021/2/9/a-history-of-the-heart-symbol
https://www.foodnetwork.com/fn-dish/news/conversation-heart-candy-history

https://en.wikipedia.org/wiki/History_of_cardiopulmonary_resuscitation

https://cpr.heart.org/en/resources/history-of-cpr

https://en.wikipedia.org/wiki/Resusci_Anne