The “sound barrier” was broken a long time ago, but what about the other barriers:
“sight barrier“, “touch barrier“, “taste barrier“, and “smell barrier“?
Those ones must be the difficult ones to break!
note: I wish someone would improve the smell barrier.
double note: juice companies always claim their products “taste berrier“, but I think that’s done through squeezing more than breaking.
triple note: one barrier that shouldn’t be broken is the “Great Barrier“.