Doit-on vulgariser son propre travail? Voilà une question qui m’a occupé l’esprit pendant de longues semaines (ouais je sais c’est un peu bidon comme excuse pour n’avoir pas posté depuis des mois).
It turns out that worms really are deeply divided. In the mid-19th century, French naturalist Armand de Quatrefages split worms into wigglers—which crawl and swim to their hearts' content, such as the marine ragworm— and the more sedentary, typically tube-dwelling nonwigglers, such as the earthworm.
One of the most fascinating things about the history of life is the way distantly related species can look alike. In some cases, the similarities are superficial, and in other cases they are signs of a common ancestry. Sometimes it’s a little of both.