Rodents and other mammals secrete chemical signals called pheromones that carry information about their gender or reproductive state, and influence the behaviour of others. Read the full article on vestigial organs Vomeronasal organ To accompany the article, here is our list of the five organs and functions most likely to be truly vestigial. This week we tackle vestigial organs in a feature article that looks at how the idea has changed over the years, and how it has come under attack from creationists anxious to deny that vestigial organs (and hence evolution) exist at all.
The idea that we are carrying around useless relics of our evolutionary past has long fascinated scientists and laypeople alike.
Probably the most famous example is the appendix, though it is now an open question whether the appendix is really vestigial. Vestigial organs are parts of the body that once had a function but are now more-or-less useless.
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