TIL that the railroad frog, which is the part of a switch that allows trains to move from one set of tracks to another, is called like that because its V-shape resembles the bottom of a horse hoof. The V-shaped part on the hoof is called "frog".
https://worldwiderails.com/why-is-it-called-a-railroad-frog/
https://en.wikipedia.org/wiki/Horse_hoof#Anatomy
#RailwaySunday #technology #switch #TIL #trains #railroads #horse #anatomy