Penguins have no external genitalia. Even as adults, the males and females can be difficult to tell apart.
There are things going on in cells that make sense only if a designing intelligence saw a need and planned for it in advance.
Believe it or not, there are amazing discoveries being made that owe nothing to Darwin, at least not explicitly.
My first exposure to intelligent design detection in science took place during a summer job with National Defence Research in 1978 as an engineering student.
If these codes were written large on paper, it would be like walking on piles of blueprints and dictionaries at every step.