Did you know that some human languages are entirely whistled?

Bibliography

UNESCO (El Silbo Gomero): https://www.youtube.com/watch?v=PgEmSb0cKBg

Scientific American (Sfyria): https://www.youtube.com/watch?v=PTHzOag8msM

Deutsche Welle (Kus Dili): https://www.dw.com/en/turkey-whistling-instead-of-speaking/av-51108780

BBC (Sfyria): http://www.bbc.com/travel/story/20170731-greeces-disappearing-whistled-language

UCSD (Tonal vs. Non-Tonal languages): http://idiom.ucsd.edu/~rose/Whistled%20and%20drum%20languages.pdf

Theme music is "Levitation" by Mabeha. Listen to the track here: https://open.spotify.com/track/0YS8xR9oPMtUvQj3C4wKHZ?si=9_Eoo7T6Q46Gq_S5DUwWaw