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Ernst Haeckel's embryological diagrams and biology textbooks

A'isha

Miss Schoolteacher
Joined
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Messages
15,221
Location
Birmingham, AL
Edited by Tricky: 
Editing images to links.

Over in this 30-page monstrosity of a thread in the Religion and Philosophy section, one of the arguments advanced against modern evolutionary theory (and the scientists who practice it) was that the drawings of Ernst Haeckel at the end of the 19th century comparing the similarities in the embryos of various vertebrate species were especially problematic.

http://i479.photobucket.com/albums/rr157/antpogo/Haeckel-1874.jpg
The particular claim stated that Haeckel's specific drawings, not just comparative embryology in general, were really the only evidence for similarities in vertebrate embryos indicating a common descent, and when embryologist Michael Richardson first noticed a problem with Haeckel's drawings in 1995 and made a formal accusation of fraud in Haeckel's drawings in 1997, the fact that evolution was essentially based on lies was laid bare for everyone to see. Even worse, the claim continues, Haeckel and his drawings are still relied on as evidence even now, in the wake of Richardson's revelations, showing just how much evolution is built on lies.

Of course, things are, in reality, a lot more complex than that. While Richardson did indeed think that Haeckel's original drawings (Haeckel himself revised them many times during his lifetime, correcting problems identified by his contemporary critics) showed evidence of fraud, or at least severe error, Richardson doesn't in anyway think that his papers do anything to harm evolutionary theory one bit. And while there has been a reassessment of Haeckel and his drawings in recent years (Richardson himself in 2002, a much stronger one from Robert J. Richards in 2009), the science of comparative embryology has basically gone beyond simply looking at pictures to see similarities, and instead focused on genomic evidence: see this 2004 paper and this 2007 paper, for instance, neither of which mention Haeckel. The 2007 paper even cites Richardson's 1997 work.

As an adjunct to the above claims, the assertion that American high school and college biology textbooks all mentioned Haeckel, reproduced his drawings, or both, was advanced to support the claim that Haeckel's work was a foundational prop of evolutionary theory, without which evolution could not stand.

The claimant provided this article and its associated database of textbooks, from the website Textbook History, as evidence for that claim. However, neither of them say what the claimant apparently thought they said. The article itself is a fairly good rundown of where and why Haeckel's diagrams were used in early textbooks, and how once working biologists got together to form the Biological Sciences Curriculum Study at the end of the 50's to reassess just what textbooks were teaching kids about science and evolution, Haeckel and his diagrams started fading from the scene.

I happen to live in Birmingham, AL, home of the University of Alabama in Birmingham, one of the leading medical and life science schools in the country. One of our libraries has an extensive archive of biology textbooks, including quite a few of the ones mentioned in the Textbook History article. The depiction in the Textbook History article of a completely new comparative embryology diagram, not taken from Haeckel's work, and including developmental stages and animals he never showed in his famous drawings, and that piqued my interest:

http://i479.photobucket.com/albums/rr157/antpogo/BlueGrid.jpg

The following posts, reproduced from the thread linked above, represent the result of my curious forays into seeing just what textbooks actually do say about Haeckel. This first attempt was very haphazard, with the main objective of examining the 1968 edition of the BSCS Blue Book, and the other information I found was basically the result of random shelf selections.

I am planning to make a return trip, better planned this time, too. So if you have any suggestions or requests that you think might help my planning, please let me know. I've also ordered a copy of the original 1963 edition of the Blue Book, and will show everyone here what I learn from it when it arrives.

Any other discussion about Haeckel and his role in both science and in textbooks, is welcome.
 
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Edited by Tricky: 
Editing images to links.

First up:

Bological Science: Molecules to Man (aka the BSCS Blue Book).

http://i479.photobucket.com/albums/rr157/antpogo/textbook/IMG_20110318_144013.jpg (Sorry about the blurriness...I was holding the book with one hand and my cell phone camera in the other. Don't worry, as we go along, my pictures get better)

http://i479.photobucket.com/albums/rr157/antpogo/textbook/IMG_20110318_150029.jpg
Revised 2nd edition from 1968, originally published 1963.

http://i479.photobucket.com/albums/rr157/antpogo/textbook/IMG_20110318_144254.jpg
Here's the index. No entry for Haeckel at all.


http://i479.photobucket.com/albums/rr157/antpogo/textbook/IMG_20110318_145712.jpg
Here's the diagram. This is why I said that the text of the 1963 book differs, since the Textbook History database entry for the 1963 Blue Book chart says it doesn't mention that the embryos are not to scale in the diagram, while the caption above clearly states that.

http://i479.photobucket.com/albums/rr157/antpogo/textbook/IMG_20110318_145733.jpg

http://i479.photobucket.com/albums/rr157/antpogo/textbook/IMG_20110318_145740.jpg
Here's what else is on the same page.

http://i479.photobucket.com/albums/rr157/antpogo/textbook/IMG_20110318_145802.jpg

http://i479.photobucket.com/albums/rr157/antpogo/textbook/IMG_20110318_145832.jpg
http://i479.photobucket.com/albums/rr157/antpogo/textbook/IMG_20110318_145820.jpg
http://i479.photobucket.com/albums/rr157/antpogo/textbook/IMG_20110318_145808.jpg
Here's what's on the page before the one with the diagram on it (the first picture is actually from the page before that one, to show the complete text of the section).

http://i479.photobucket.com/albums/rr157/antpogo/textbook/IMG_20110318_145902.jpg

http://i479.photobucket.com/albums/rr157/antpogo/textbook/IMG_20110318_145909.jpg

http://i479.photobucket.com/albums/rr157/antpogo/textbook/IMG_20110318_145917.jpg
Here's what's on the page after the one with the diagram on it (you can see the bit of the diagram in the top picture)

I apologize for the slightly disjointed nature...I wanted to make sure I got readable text. All photos have adjacent overlaps, so it should be clear that I've taken pictures of the entire pages from context.

Of particular note is that this diagram not only isn't Haeckel's, it's in a section of the book that doesn't even have anything to do with evolution. It's the section on the development of an embryo into an adult organism.
 
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Next up: High School Biology (aka the BSCS Green Book)
Edited by Tricky: 
Editing images to links.


http://i479.photobucket.com/albums/rr157/antpogo/IMG_20110318_150434.jpg

http://i479.photobucket.com/albums/rr157/antpogo/IMG_20110318_150459.jpg

Also originally published in 1963, with this revised 2nd edition coming out in 1968.

http://i479.photobucket.com/albums/rr157/antpogo/IMG_20110318_150517.jpg

Here's the index. Hey, look! It's Haeckel!

http://i479.photobucket.com/albums/rr157/antpogo/IMG_20110318_150551.jpg

So we turn to page 191, and...huh. It's talking about microorganisms and the phyla of protists. Nothing to do with vertebrates, much less their embryos. Why is Haeckel mentioned here, if he's most famous in science for his vertebrate embryo drawings?

http://i479.photobucket.com/albums/rr157/antpogo/IMG_20110318_150557.jpg

http://i479.photobucket.com/albums/rr157/antpogo/IMG_20110318_150603.jpg

http://i479.photobucket.com/albums/rr157/antpogo/IMG_20110318_150608.jpg

Turns out he also came up with the idea of the protista kingdom under which to group microorganisms. In an amusing mirroring of how Haeckel re-entered textbooks once comparative embryology resurged in the 90's, he's apparently mentioned here because the textbook talks about how his idea of a phylum called protista had been revived in "recent years". Still, as with comparative embryology, science is a fickle mistress, and the kingdom of protista is once again disputed in science.

http://i479.photobucket.com/albums/rr157/antpogo/IMG_20110318_150834.jpg

Remember, that was the one and only mention of Haeckel in the book, per the index. Here's the same diagram from the Blue Book (though turned on its side), waaaaaaay over on page 679.

http://i479.photobucket.com/albums/rr157/antpogo/IMG_20110318_150829.jpg

Sorry about the blurriness again, but the caption is fortunately still legible. Note how it doesn't mention Haeckel, only Darwin.

http://i479.photobucket.com/albums/rr157/antpogo/IMG_20110318_150755.jpg

http://i479.photobucket.com/albums/rr157/antpogo/IMG_20110318_150802.jpg

http://i479.photobucket.com/albums/rr157/antpogo/IMG_20110318_150807.jpg

Here's the text of the previous page (you can see the diagram and its caption off to the right).

http://i479.photobucket.com/albums/rr157/antpogo/IMG_20110318_150947.jpg

http://i479.photobucket.com/albums/rr157/antpogo/IMG_20110318_150926.jpg

http://i479.photobucket.com/albums/rr157/antpogo/IMG_20110318_150933.jpg

And the page after. No Haeckel anywhere to be seen. In fact, the text implies that the entire concept of embryos containing clues to evolution was entirely Darwin's, and pretty much explicitly attributes the creation of comparative embryology to him. Haeckel's own roles in and contributions to both those things are completely forgotten and ignored.
 
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Last one, for now - I had some issues with some of the images I took for the other two textbooks I looked at during my first visit. I'll replace those when I make my second visit, and post them along with the other images of them I took (in addition to whatever new pictures I take).

I don't have as many pictures of this book as I do of the others, since this was something I uncovered purely by accident, grabbing random books off of shelves, near the end of my visit.

http://i479.photobucket.com/albums/rr157/antpogo/IMG_20110318_153659.jpg

Biology: A Guide to the Natural World, by David Krogh.


http://i479.photobucket.com/albums/rr157/antpogo/IMG_20110318_153724.jpg

Second edition published 2002, originally published in 2000.

http://i479.photobucket.com/albums/rr157/antpogo/IMG_20110318_153826.jpg

Once again, no mention in the index of our friend Haeckel. Though I see Woody Guthrie gets a namedrop. Apparently folk singers are more important to modern science than Haeckel is. That's gotta sting.

Anyway, as I paged through the book, looking for a comparative embryology diagram, I encountered this:

http://i479.photobucket.com/albums/rr157/antpogo/IMG_20110318_153748.jpg

It's a comparative diagram, all right. But look closer, at the caption.

See that? "Adapted from M. K. Richardson, 1997". This diagram was taken right from the paper about Haeckel that the promoters of the claim in my OP are so fond of waving about! Richardson's own diagrams showing how Haeckel was incorrect and shouldn't be used as evidence for vertebrate embryological similarities showing common descent, are themselves evidence for vertebrate embryological similarities showing common descent. The problem wasn't the concept, it was Haeckel. So, science abandoned Haeckel, and turned to non-tainted evidence instead.
 
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We need this stickied. Thank you very much for the hard work you put into this! :D
 
ANTPogo - would it be apropriate for me to repost the pages from the 1944 biology book which deal with Haeckel? As a historical perspective?
 
There's a really amusing part in "A Flock of Dodos" where this fundy insists that Haeckels' drawings are still used in textbooks today. They go through several of his own biology books and find one reference to Haeckel, in the introduction. Pwned!
 
Absolutely!

OK.


Note: I've Attached these files rather than Quick Uploaded them as resizing them for the latter option renders them unreadable.

ETA: These pages are from a 1944 (2nd edition) copy of Animal Biology by Grove and Newell - University Tutorial Press.
 

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I suspect that many of the Haeckel arguments come from the book Icons of Evolution (2000), by Discovery Institute fellow Jonathan Wells. He makes a number of false claims about evolution, including the use of Haeckel and his drawings as guides for today's biology students. For a through critique of this book see here. This is from the National Center for Science Education (NCSE).

To jump straight to the part about Haeckel see here.

From the last link:"Regardless of Haeckel's accuracy or preconceptions, comparative embryology continues to be central to our understanding of evolution. Comparative embryology shows how different adult structures of many animals have the same embryonic precursors."

There is also a good response to Wells in the book "EVOLUTION What the Fossils Say and Why It Matters" by Donald R. Prothero. I think I got my copy through Skeptic. The 10% discount for subscribers makes the cost about the same, not sure how the shipping charges compare though.
 
ETA: These pages are from a 1944 (2nd edition) copy of Animal Biology by Grove and Newell - University Tutorial Press.

Interesting. No diagram, and Haeckel and his work (along with that of von Baer) is mentioned as being historically important to the study of comparative embryology.

It also has a surprisingly Gouldian take on the recapitulation theory, completely disclaiming Haeckel's conception of it in favor of a more general idea that embryos of organisms descended from an ancestor organism will show similarities in their embryological stages to each other as well as to their common ancestor (since that's where they both started), but will also show quite a bit of differences to reflect the actual adaptational elements that have been evolved in each of the descendant organisms.

Thank you for the pictures. And if anyone has any more textbooks, please post 'em!
 
As a, possibly, amusing/ironic side note, the books belonged to my late uncle John. He started his studies at a seminary with a view to becoming a Catholic priest (he was the oldest boy of the family!) but after he had to break off his studies to do his National Service, he decided to go to university and become a doctor instead. Stayed a practicing Catholic all his life, mind.
 
Okay, so I'm back from my trip now, and waiting for me was my copy of the original 1963 edition of the BSCS Blue Book.

http://www.internationalskeptics.com/forums/picture.php?albumid=670&pictureid=4406

The name is even more obvious for this edition than it was for the 1963 revision, where they made the cover white with blue highlights.

http://www.internationalskeptics.com/forums/picture.php?albumid=670&pictureid=4407

The copyright page. Original 1963 edition.

http://www.internationalskeptics.com/forums/picture.php?albumid=670&pictureid=4408
http://www.internationalskeptics.com/forums/picture.php?albumid=670&pictureid=4409

The index. No Haeckel.

http://www.internationalskeptics.com/forums/picture.php?albumid=670&pictureid=4413

Same diagram as in the 1968 edition. Not Haeckel's. The caption, as I surmised, is different between the two editions (the 1968 revision expanded on things a little from the 1963 edition).

http://www.internationalskeptics.com/forums/picture.php?albumid=670&pictureid=4412

The page before the diagram.

http://www.internationalskeptics.com/forums/picture.php?albumid=670&pictureid=4414

The page after. As in the 1968 revision (and unlike the BSCS Green Book), the comparative diagram is in the section about how an individual organism develops from a fertilized egg, and has nothing to do with evolution. The page right after the diagram of vertebrate embryos jumps right into talking about plants!
 
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A side note: as I was riffling through my new acquisition above, I was marveling at the astoundingly good condition of it (especially considering that the book is just two years shy of being half a century old!). And then, suddenly, the book flopped open to reveal this:

http://www.internationalskeptics.com/forums/picture.php?albumid=670&pictureid=4410

http://www.internationalskeptics.com/forums/picture.php?albumid=670&pictureid=4411

This is the original flyer that the Blue Book's publisher, Houghton Mifflin, sent along with sample copies of the book, to encourage schools to examine the textbooks and hopefully order it for their students.

That partially explains why this particular copy was in such good shape - it was never actually used in a classroom, but was one of those promotional copies to try and entice schools to purchase it. It's still there, folded neatly and crisply inside my copy of the book, after nearly fifty years!

Remarkable!
 
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Besides the fact that you found obvious evidence that the fundie argument against Haeckal is flawed, I found the comparative anatomy in my Zoology degree as taught by one of Haeckel's students student the most convincing evidence for evolution I came across.

It was the most enjoyable course in my degree and I would recommend every single person study comparative anatomy as pioneered by Haeckel.
 
Superb thread!

The book we used in the basic course of zoology a few years ago at my university was Zoology by Robert L. Dorit, Warren F. Walker Jr. and Robert D. Barnes (Thomson Learning Inc., 1991). I don't have any photos, but it doesn't mention Haeckel in the index, and there are no comparative charts such as the ones you have shows from other textbooks at all, at least not in the chapter on embryonic development. There is a chart comparing Amphioxus, a frog and a mammal up to the blastula stage, but nothing further. There is no chart of the sort in the chapters on evolution.

I'll see if I can find some other course books we're using.
 
There's a really amusing part in "A Flock of Dodos" where this fundy insists that Haeckels' drawings are still used in textbooks today. They go through several of his own biology books and find one reference to Haeckel, in the introduction. Pwned!

as an aside, flock of dodos is available via netflix watch instantly.
 
as an aside, flock of dodos is available via netflix watch instantly.

It seems netflix is only available for those in the U.S.

This clip includes the mentioned footage from the film:



ETA: John Calvert's intellectual dishonesty is clear here as he hems and haws at the suggestion of examining the evidence for something that he had been arguing with such certainty moments ago.
 
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So Ant, why would you spend all that time just to start a thread based on a lie? It took over 130 years of sustained criticism just to get evos to finally admit the drawings were faked and even then they say they didn't know until 1997 or thereabouts.

How could that be with so many practically shouting it in their face for decades?

What sort of diabolical mentality are we dealing here with that intelligent people would actually resist even admitting a known forgery as faked and then act like it was discovered to be so by evos?

But more to the point, you know full well after telling you multiple times that I brought up this saga to show how evolutionism isn't real science in that it promotes distortion of data instead of a careful and judicious view of what data and does not say.

I never claimed this was a death knell for the theory, just as a case in point illustrating how evos use or rather misuse and in this case, even fake, data.

Your post here is more evidence of this inability to look at data objectively. You felt the need to continue either conscious or unconscious delusions and curiously nevertheless felt compelled to spend a lot of time doing so.
 

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