Category Archives: Fossil record
No one, so far as I know, has any religious objection to the Periodic Table and the unifying concepts of chemistry. But some people do have religious objections to the geological record, and to the unifying concepts of geology, because these don’t agree with what the most learned men of their time and place wrote down some two and a half thousand years ago.1 And as I argued in my last post, such people will seize on real or imagined anomalies as evidence that the entire intellectual structure is unsound. By contrast, the scientist’s response to such anomalies is to regard them as a potential source of new knowledge, far more likely to extend the framework in a mature discipline than to destroy it.
Example 1: Superposition and overthrusts
It is more than 350 years since Steno (who eventually became a bishop) proposed that strata consisted of layers of rock laid down one on top of another, newest on top. We have known for over two hundred years that both the London and Paris basins are filled with relatively recent sediment, on top of marine deposits (chalk or limestone) that emerge in hills to the North and South, that these in turn rest on an older basement, and that the more recent sediments were laid down in layers. The familiar geological sequence, Precambrian upwards (click to enlarge), was established in something like its present form before 1860, by merging the overlapping but incomplete local rock columns, although it was not until the 20th Century that it was recognised that the Precambrian occupied far more of the Earth’s history than everything since that time.
One major disruption of the usual order occurs in the northwest of Scotland, where older rocks lie above younger along a 200 km front. The resulting confusion (the “Highlands Controversy“, fuller account here) was not resolved until the 1880s, with the recognition of what is now known as the Moine Thrust. Read the rest of this entry
EVOLUTION: What the Fossils Say and why it Matters, Donald R. Prothero (2nd edition)
If you are interested in evolution, get this book. And make sure that your library gets it. And your children’s highschool library. Incidentally, it’s incredible value; list price $35.00/£27.95 from Columbia University Press, with over 400 lavishly illustrated pages.
The book is a comprehensive survey of the fossil record, supplemented at times with other evidence, and framed as one long argument against creationism. It opens with a general discussion of the ideas behind current evolutionary thinking, moves on to a survey of specific topics in (mainly animal) evolution, from the origins of life to the emergence of humanity, and concludes with a brief discussion of the threat that creationism poses to rational thinking. The argument is laid out clearly in the seemingly artless prose of an accomplished writer in love with his subject matter, with plain language explanations that presume no prior knowledge, while the detailed discussions of specific topics give enough detail to be of value, I would imagine, even to a professional in the field. The author is an experienced educator and researcher, with thirty books ranging from the highly technical to the popular, some 300 research papers, and numerous public appearances to his credit, and the work is copiously illustrated with photos, diagrams, and drawings by the author’s colleague, Carl Buell. These illustrations are an integral part of the work, graphically displaying the richness of the data at the heart of the argument. Read the rest of this entry
“The wise learn from everyone.”1 The freak success (half a million reads) of my recent piece How to slam dunk creationists, and the subsequent discussion, have again set me thinking about how to learn from creationists. It is not enough to say, as Dawkins notoriously said, “[I]f you meet somebody who claims not to believe in evolution, that person is ignorant, stupid or insane (or wicked, but I’d rather not consider that).” Conversation is a two-way street, I have certainly learnt from creationists’ attacks on evolution, and if I am learning from them it is at least possible that they are learning from me.
Types of comment
Comments I have had from creationists fall into three broad groups (and note that contrary to what Dawkins says, some of these are at least partly informed, highly intelligent, and completely rational):
1) Simple misstatements
2) Appeal to the Bible
3) Purportedly scientific arguments, some without merit, while others refer to important issues.
From simple misstatements, not very much can be learnt, except perhaps the source of the misinformation. Remember that if someone quotes wrong information, the burden of proof is not on you but on them. Leave it there, as in this actual exchange: Read the rest of this entry
Ten minutes difference, and Earth would still be Planet of the Dinosaurs
We have suspected for some decades that the dinosaurs1 became extinct as the result of a massive meteorite, an asteroid, hitting the Earth. We have known where the impact site was since 1990, if not before. But it is only last year that we successfully drilled into the impact site, and only now, for the first time, do we really understand why the impact was so fatal. And if the meteorite had arrived ten minutes earlier, or ten minutes later, it would still no doubt have inflicted devastation, but the dinosaurs would still be here and you wouldn’t.
66.1 million years ago, dinosaurs covered the Earth. 66 million years ago, there were none. And not only the dinosaurs, but the pterosaurs in the skies, the long necked plesiosaurs and even the ammonites in the oceans, and 75% of all complex animal life. No terrestrial vertebrate heavier than around 25 kg seems to have survived. What happened? Read the rest of this entry
The Discovery Institute, self appointed spokesman for Intelligent Design theory (i.e. cryptocreationist obscurantism) has singled out my piece in The Conversation, How to slam dunk creationists when it comes to the theory of evolution.
My piece argues that we should be talking about the evidence, not about the meaning of words. In particular, I take exception to the National Academy of Sciences definition of a theory as “supported by a vast body of evidence”, on the grounds that calling something a theory tells us nothing about how well supported it is. The Discovery Institute uses fancy layout to quotemine what I said, so that my criticism of the National Academy is made to look like approval, before taking exception to the National Academy of Sciences definition of a theory as “supported by a vast body of evidence”, on the grounds that calling something a theory tells us nothing about how well supported it is.
In passing, the DI also tells us that “Sahelanthropus … is thought by some to just be a female gorilla.” Eat your heart out, Smithsonian.
I’m honoured by such well-informed and well thought out attention. And while the DI’s article is unsigned, connoisseurs of Creationism will understand my additional delight at having Casey Luskin and Douglas Axe listed among my accusers. With enemies like this, who needs friends?
At the time of writing, my piece has attracted 78,000 hits [update: 95,000 hits] and been featured by Newsweek, Business Insider, The Raw Story, RealClearScience, and others. My thanks to Jane Wright, at The Conversation, whose skilful editing helped make all this possible.
[The read count by end 2017 was >307,000, with ~250,000 additional hits via Yahoo! News. The article was also translated into Arabic by the Iraqi Translation Project]
Catastrophist creationism gracefully refuted (again); this time by skid marks of drifting ammonite. Free download of paper at Lomax DR., Falkingham PL., Schweigert G., and Jiménez AP. 2017. An 8.5 m long ammonite drag mark from the Upper Jurassic Solnhofen Lithographic Limestones, Germany. PLOS ONE
“Is this proof dinosaurs lived with HUMANS? Creationist claims REAL truth COVERED UP”
The Express, an ostensibly serious right wing UK newspaper, reports under “SCIENCE”.
The evidence? A display at Ken Ham’s Creation Museum. Ham is quoted as saying that the standard scientific evidence is a coverup, as his own dinosaur fossils show, for some unstated but presumably non-standard reason:
“Ken Ham, founder of Creation Museum in Kentucky, United States, has put the supposed evidence on display at his centre. Standard scientific evidence shows dinosaurs died out 66 million years ago … and the anatomically modern man did not emerge until around 200,000 years ago. But Mr Ham believes this is a cover-up … the dinosaur fossils were found in Colorado about a decade ago and seem to represent a tyrannosaurus rex [sic].”
(Fuller quotations supplied by the Sensuous Curmudgeon, here)
Ham complains that evolutionists “use dinosaurs … to promote their worldview”. How dare they! But do not accuse the Express of bias. It does refer to what it calls “the standard scientific evidence”, and they do quote two sentences from Bill Nye, before showing the image on the right:
And compared with the image below, the paper’s front page in the runup to the Brexit referendum, the dinosaur story is factually balanced reporting reporting; fake news is not the invention of the Trump campaign.
The Express group is wholly-owned by Richard Desmond, a UK billionaire and former publisher of such informative periodicals as Penthouse and Asian Babes. circulation is close to 400,000, in addition to online readership. In 2002, Desmond made a £100,000 donation to Blair’s Labour Party, but in 2004 switched allegiance to the Conservatives.
The lead story of this post would seem to be based on the February 4 2014 debate between Ken Ham and Bill Nye, which did so much to restore the former’s finances. Why it should have resurfaced now in the Express, I have no idea. But it does concern me. Desmond does not make a habit of backing longterm losers.
“imagine a puddle waking up one morning and thinking, ‘This is an interesting world I find myself in, an interesting hole I find myself in, fits me rather neatly, doesn’t it? In fact, it fits me staggeringly well, must have been made to have me in it!’ This is such a powerful idea that as the sun rises in the sky and the air heats up and as, gradually, the puddle gets smaller and smaller, it’s still frantically hanging on to the notion that everything’s going to be all right, because this World was meant to have him in it, was built to have him in it; so the moment he disappears catches him rather by surprise. I think this may be something we need to be on the watch out for.”
I yield to no one in my admiration for Douglas Adams, and admire here in particular his reminder that our place in the Universe may really be rather precarious. However, on this occasion he had been anticipated. Read the rest of this entry
The now Vice-President of the United States stands accused of having said that evolution is “just a theory”; see here and here. No he did not say that. What he did say (full text below, with notes) was far, far worse. Much more detailed and much more dangerous.
L: Pence being sworn in as a member of the House Education and Workforce Committee (CNN)
After reminding us that he was trained in law and history, he mangles the historical facts and legal significance of a key court case (the Scopes trial).
By quotemining a secondary source,* which he treats as if primary, he twists the then-recent discovery of Sahelanthropus into an argument against the underlying science. It is changeable, he argues, therefore it is uncertain.
He justifies this manoeuvre by harping on the ambiguous word “theory”, and making a falsely rigid distinction between theory and fact.
R: Sahelanthropus tchadensis, photo from Smithsonian Human Origins website
And worst of all, he asks his colleagues to “demand [emphasis added] that educators around America teach evolution not as fact, but as theory”. The proponent, when it suits him, of small Government wants Washington to tell teachers how to teach.
Pence has been accused of stupidity because of the factual and logical errors contained in his speech. On the contrary, Read the rest of this entry