A rep for Charles Kelley was not immediately available for comment. Truth or rumor, when news that the singer was splitting hit the internet Sunday (October 18), Twitter immediately exploded with pithy commentary.
Best Answer: Blame it on the comet that struck earth. All animals larger then 10kg died of. Just leaving behind small mammals, small reptiles and tiny beaked flying dinosaurs (birds). All the cool giant dinosaurs died out and you just left with tiny birds which evolve to various bird species including the chicken.
Outside the world of bacteria, evolutionary changes take longer to fully realize. Australian skinks, for instance, lost their legs to become more snakelike over the course of 3.6 million years -- and even this was a rather fast change [source: Roach]. That, in a nutshell, is how life evolves.