They are a barrier to travel and settle ment because of the snow and there peaks
If you want too...
Yes: humpback whales travel through the Great Barrier Reef on their annual migration.
Exceeding the sound barrier refers to speed of travel, not loudness of sound. A speaker cannot "exceed the sound barrier".
Fear of the unknown.
Drought
Drought
The sound barrier
Most modern guns DO fire bullets that break the sound barrier. That is, their bullets travel faster than the speed of sound when they are fired.
They break the sound barrier and they will reach you before the sound does
He has to travel at more than 760mph.
At sea level it needs to travel at 340m/s.