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TIL about the ‘Doppler effect’ which explains why a siren's pitch changes as it passes by

Read more scienceabc.com

via reddit.com

R7o74 TIL Dogs like squeaky toys because the sounds mimics a small animal screaming in pain as it dies.
woJ56 TIL that hundred of television shows and movies are canon to a show called St. Elsewhere. It started as a criticism of rigor around comics lore and has since evolved into a fan project.
MejgW TIL about the Jabuticaba tree which grows warts like fruits directly on its trunk.
JYaoQ TIL Film composer Hans Zimmer was a member of the The Buggles who had the first music video on MTV with “Video Killed the Radio Star”
xo8k TIL H.R. Giger (designer for the ‘Alien’ series) has two bars in Europe with the same amazing biomechanical design he used in the Alien movies.