There is no evolutionary barrier to chickens flying. They all can, but most choose not to do so very far or very often.
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They dont fly freely.Mine did, just not very far.
Woolly Mammoths are still found in polar ice. There must have been a big melt before the freezing encroached back on them?
Quick question, alancalverd. How can you handle a deep stall if the elevators are effectively non functioning?RTFM! A production aircraft will have been tested in all conceivable flight modes, load distribution limits will have been set, and recovery from "unusual attitudes" will be in the book (pace Boeing, perhaps).