Consider a biological structure which no longer benefits an organism, such as the eyes of an organism whose population now lives in total darkness. I can think of three reasons why such a structure ...
What is the biological function of nose hair? In general, can we consider underarm hair and pubic hair to be vestigial structures?
Is it a myth that modern whales have been found with hind legs sticking out of their sides and full formed tibias, fibias, and toe bones? I keep finding assertions, but no citations. For example, the ...
In humans the Appendix is a vestigial organ. Does it serve no apparent purpose in all the vertebrates that have one?