Je suis en train de lire un livre qui donne des arguments très persuasifs pour la réalité de l'évolution.
J'aimerais partager un extrait avec vous, qui constitue un argument parmi (plusieurs) autres pour l'évolution de notre espèce à partir de singes anciens:
««« One of my favorite cases of embryological evidence for evolution is the furry human fetus. We are famously known as "naked apes" because, unlike other primates, we don't have a thick coat of hair. But in fact for one brief period we do - as embryos. Around six months after conception, we become completely covered with a fine, downy coat of hair called lanugo. Lanugo is usually shed about a month before birth, when it's replaced by the more sparsely distributed hair with which we're born. (Premature infants, however, are sometimes born with lanugo, which soon falls off.) Now, there's no need for a human embryo to have a transitory coat of hair. After all, it's a cozy 98.6 degrees Fahrenheit in the womb. Lanugo can be explained only as a remnant of our primate ancestry: fetal monkeys also develop a coat of hair at about the same stage of development. Their hair, however, doesn't fall out, but hangs on to become the adult coat. And, like human, fetal whales also have lanugo, a remnant of when their ancestors lived on land. »»»
Voilà, l'existence chez les foetus humains d'un manteau de fourrure s'explique très mal dans l'hypothèse d'un «dessein intelligent», mais très bien dans l'hypothèse d'une évolution humaine.
J'aimerais partager un extrait avec vous, qui constitue un argument parmi (plusieurs) autres pour l'évolution de notre espèce à partir de singes anciens:
««« One of my favorite cases of embryological evidence for evolution is the furry human fetus. We are famously known as "naked apes" because, unlike other primates, we don't have a thick coat of hair. But in fact for one brief period we do - as embryos. Around six months after conception, we become completely covered with a fine, downy coat of hair called lanugo. Lanugo is usually shed about a month before birth, when it's replaced by the more sparsely distributed hair with which we're born. (Premature infants, however, are sometimes born with lanugo, which soon falls off.) Now, there's no need for a human embryo to have a transitory coat of hair. After all, it's a cozy 98.6 degrees Fahrenheit in the womb. Lanugo can be explained only as a remnant of our primate ancestry: fetal monkeys also develop a coat of hair at about the same stage of development. Their hair, however, doesn't fall out, but hangs on to become the adult coat. And, like human, fetal whales also have lanugo, a remnant of when their ancestors lived on land. »»»
Voilà, l'existence chez les foetus humains d'un manteau de fourrure s'explique très mal dans l'hypothèse d'un «dessein intelligent», mais très bien dans l'hypothèse d'une évolution humaine.