God is THE Great Engineer.........................
Just as strange as how snakes developed fangs, one night in the 1970’s, some kid broke into the Reptile House at National Zoo in Washington D.C. He managed to steal a full sized Gabon Viper - which is a very impressive snake. He put it into a paper grocery bag, and while riding home on a city bus, the snake bit him. He survived, but only because they rushed in anti-venom in from somewhere else.
Genesis 49:17
Dan shall be a serpent by the way, an adder in the path, that biteth the horse heels, so that his rider shall fall backward.