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THE GIST
Embryos for humans and other animals often look alike at certain developmental stages because they share ancient genes.
These ancient genes are expressed during a middle "phylotypic period" of embryonic development for all species.
Developing human, fish and other embryos therefore at times share features, such as tails and gill-like structures.
Human embryos resemble those of many other species because all animals carry very ancient genes. These genes date back to the origin of cells, which are expressed during a middle phase of embryonic development, according to two separate papers published in this week's Nature.
The findings help to explain why our embryos have a tail when they are a few weeks old and why human embryos retain other characteristics, such as fur-like hair and fish embryo similarities, seen in the developmental stages of other species.
"On average, the similarities will be even stronger for more closely related species," Diethard Tautz told Discovery News.
"However, it is indeed true that even fish and human embryos go through a phase that looks very comparable, while they are rather different before and after this," added Tautz, who co-authored one of the papers and serves as managing director of the Max Planck Institute for Evolutionary Biology.
He and colleague Tomislav Domazet-Loso tackled the "ontogeny recapitulates phylogeny" puzzle. This expression means that a more advanced organism, like humans, will resemble less advanced species during it's development stages.
originally posted by: Psynic
As of yesterday or today, I'm not seeing anyone's avatar.
I thought this thread may have been about this new development.
Anyone know what's going on?
originally posted by: Psynic
As of yesterday or today, I'm not seeing anyone's avatar.
I thought this thread may have been about this new development.
Anyone know what's going on?
originally posted by: tothetenthpower
a reply to: tetra50
It generally would be OT to post regarding a member's avatar or signature in a thread, not related to those two subjects.
However, I often have this happen, as you said and what I do is send the member a PM and engage them in that sphere.
~Tenth
originally posted by: IShotMyLastMuse
a reply to: tetra50
ehehe that's a whole different story i guess, and in the words of tom waits, "don't you know there ain't no devil there's just god when he's drunk"
And that article about the similarities between human and fish Embryos is actually kinda cool, one of the stories i am writing right now centers around mermaids, and that tidbit of info might come in handy!-It was meant to be!
originally posted by: KnightLight
a reply to: Psynic
you are logged out?
What does information is not knowledge mean?
It's a thought I want to convey to people all the time, but what's your take?
It's one of my issues with the AI movement. IE computers don't know anything.
originally posted by: SecretKnowledge
a reply to: tetra50
The amount of times people have told me they thought there was bugs on their screen because of my signature...
originally posted by: tetra50
See, that's what I'm talking about here. That's a great sig…..and nails a huge AI matter. Facts, information is only a part of the equation of knowing anything, don't you think?
originally posted by: kosmicjack
I love siggies, avatars, locations, moods and profile pages...it's a form of self expression and a way to get to know members.
I have been collecting "moods" for well over a year cuz I want to do a thread...some are harious. some are like whaaaaa!? You've inspired me to finish it Tetra (not a fish).