Suppose a fish evolves lungs. What happens then? Does it move up the next evolutionary stage? No, it drowns!
Suppose a fish evolves lungs. What happens then? Does it move up the next evolutionary stage? No, it drowns!
The classic example of the irreducible complexity is the human eye. An eye is of no use unless all its parts are fully formed and working together. Even a slight alteration from its current form destroys its function. How then could the eye evolve by slight alterations? Even on Darwin's day the complexity of the eye was offered as evidence against his theory, and Darwin said the mere thought of trying to explain the eye gave him "a cold shudder".