Hello there!

Watch: This extremely human behavior was just observed in animals

Originally Published: 
Raphaela Heesen and Emilie Genty

How do you start and end a conversation?

With a greeting, of course — be it a handshake, saying hello or goodbye, a hug, nodding, bowing, or waving.

Greetings are intrinsically human, no matter where you’re from. Scientists previously thought this collective social behavior was also unique to humans.