Category Archives: Science

Behe demolishes Darwin (yet again!)

Michael Behe has a new book coming out, Darwin Devolves, which according to the mendaciously mislabelled Evolution News “Topples Foundational Claim of Evolutionary Theory.” I am unlikely to be sent a review copy, so I am relying on the Evolution News summary.

In brief, Behe continues to assert the existence of irreducible complexity in animal organs, while maintaining that

Darwinian evolution proceeds mainly by damaging or breaking genes, which, counter-intuitively, sometimes helps survival. In other words, the mechanism is powerfully de-volutionary. It promotes the rapid loss of genetic information.

and encapsulates this conclusion in what he calls the First Rule of Adaptive Evolution:

Break or blunt any gene whose loss would increase the number of offspring.

I reviewed Behe’s earlier statement of this Rule some years ago, in PandasThumb, and friends have suggested that I repost it. So here it is. (I am proud to say that it has already been reposted by Peaceful Science.

Since this First Rule of Adaptive Evolution, the pinnacle of Behe’s argument, was already spelt out in the earlier work, there is little that I need add to my original review below, beyond pointing out that even this puny statement of the obvious came with a debilitating disclaimer

It is called a “rule” in the sense of being a rule of thumb. It is a heuristic, useful generalization, rather than a strict law; other circumstances being equal, this is what is usually to be expected in adaptive evolution

and reminding Behe that he is himself the product of a massive increase in genetic complexity, the doubling and redoubling of the genome that separates him from his early notochord ancestors.  The original review follows [note: in that review I referred to “E.Coli acquiring the ability to metabolise citrate under anaerobic conditions”; that should be “aerobic conditions, in the absence of a reducing agent”. h/t Monica Lewis. this does not, however, affect the logic of the argument]:

Behe’s review in context, or what’s the point?

The Panda's Thumb Read the rest of this entry

Why climate skepticism is not skepticism

Sourcing Skepticism … what factors drive questioning of Global Warming?

Copied wth permission of the author, Adam Siegel, from

The original was posted on September 13th, 2007 and attracted 23 Comments

Now it seems more relevant than ever, with such “skepticism” the posture of governments from Australia to Washington while the Arctic ice melts and methane begins to rise from the tundra.

Skepticism … the ability to question unquestioned beliefs and stated certainties is a powerful intellectual tool.

Sadly, “skepticism” is receiving a bad name through association with those ready, willing, able, and enthusiastic about denying the reality before their (and our) own eyes about the global changes in climate patterns and humanity’s role in driving these changes.

Questioner … Skeptic … Denier …

Clearly, not every question, not every challenge to data, not every voicing of concern is the same.  Nor is every motivation the same.  This is not simply about “fossil-fuel-funding” — although it can be at times. This is not simply about seeking Rapture and the end of times — even though it can be.  This is not simply about political beliefs creating thought structures for dealing with science — but it can be. Read the rest of this entry

The Scopes “Monkey trial”, Part 2: Evidence, Confrontation, Resolution, Consequences

This weekend sees the 93rd anniversary of the Scopes Trial, and I am reposting this and its companion piece to celebrate.

I would point out two things. One is that the actual William Jennings Bryan was nothing like the ogre of Inherit the Wind, which was an allegory of McCarthyism. The other is how remarkably well the scientific evidence has stood up to almost a century of examination. There is even a mention, based on serological evidence, of how closely related whales are to hoofed land animals.

Primate's Progress

Darrow: Did you ever discover where Cain got his wife?

Bryan: No, sir; I leave the agnostics to hunt for her.

Both sides, I will argue, were long-term loses in this exchange. But why were such matters being discussed in Tennessee court of law in the first place?

Part 1: the story so far: An extraordinary case indeed, where a school teacher, with the encouragement of his own superintendent, volunteers to go on trial in the State court for the crime of teaching from the State’s approved textbook, and where that same superintendent will be the first witness called against him. And where a mere misdemeanour case, with a maximum penalty of $500, could attract the participation of William Jennings Bryan, former US Secretary of State, and Clarence Darrow, America’s most famous trial lawyer and an agnostic.

BillySundayPreaching Billy Sunday preaching

In the run-up to the case, we even have the…

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The Scopes “Monkey trial”, Part 1: Issues, Fact, and Fiction

This weekend sees the 93rd anniversary of the Scopes Trial, and I am reposting this and its companion piece to celebrate.

I would point out two things. One is that the actual William Jennings Bryan was nothing like the ogre of Inherit the Wind, which was an allegory of McCarthyism. The other is how remarkably well the scientific evidence has stood up to almost a century of examination. There is even a mention, based on serological evidence, of how closely related whales are to hoofed land animals.

Primate's Progress

What is the purpose of this examination?

We have the purpose of preventing bigots and ignoramuses from controlling the education of the United States, and that is all.

DaytonCourthouse Dayton Courthouse today

Inherit the Wind, the prism through which the public sees the Scopes Trial, is a travesty. William Jennings Bryan, who prosecuted Scopes, was neither a buffoon nor a biblical literalist but moved by deep concerns that continue to merit attention. He did not protest at the leniency of Scopes’s punishment, but offered to pay the fine out of his own pocket. Nor did he collapse in defeat at the end of the trial, but drove hundreds of miles, and delivered two major speeches, before dying in his sleep a week later. Scopes, on trial for the crime of teaching evolution in Tennessee state school, was never at risk of prison. He was no martyr, but a willing participant…

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Can we trust radiocarbon dating?

Willard Frank Libby, inventor of the method

Can we trust radiocarbon dating? Young Earth creationists tell us that we can’t. After all, it makes the same range of assumptions as other radiometric dating methods, and then some. Other methods benefit from internal checks or duplications, which in the case of radiocarbon dating are generally absent. There are numerous cases where it appears to give absurdly old ages for young material, while apparent ages of a few tens of thousands of years are regularly reported for material known on other evidence to be millions of years old. So can the Young Earth creationist1 objections be rebutted, and if so how?

The principle of radiometric dating is simple.2 If we know how much of a particular radioactive substance was present when a material formed, how much is still there, and Read the rest of this entry

Grand Canyon Unconformities –and a Cambrian Island

I have discussed the Grand Canyon myself at , and strongly recommend this beautifully written and illustrated guide to its unconformities


A prominent ledge punctuates the landscape towards the bottom of the Grand Canyon. It’s the Tapeats Sandstone, deposited during the Cambrian Period about 520 million years ago, when the ocean was beginning to encroach on the North American continent, an event called the Cambrian Transgression. Above the ledge, you can see more than 3000 feet of near-horizontal sedimentary rocks, eroded into cliffs and slopes depending on their ability to withstand weathering and erosion. These rocks, deposited during the rest of the Paleozoic Era, are often used to demonstrate the vastness of geologic time–some 300 million years of it.

View of the Grand Canyon from the South Rim trail. Arrows point to the Cambrian Tapeats Sandstone. View of the Grand Canyon from the South Rim trail. Arrows point to the Tapeats Sandstone.

But the razor-thin surface between the Tapeats and the underlying Proterozoic-age rock reflects the passage of far more geologic time  –about 600 million years where the Tapeats sits on top the sedimentary rocks of the Grand…

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Why historical science is the best kind of science

This is for a planned wide-audience writing project on evolution, in which I pre-empt (rather than respond to) creationists’ counter-arguments, such as their downplaying of historical science. I would greatly value comments on this approach.

There are sciences, such as physics and chemistry, where we can perform experiments. There are other sciences, such as the science of planetary motion (and astronomy in general) where we cannot do this, but we can still carry out repeated observations in well-controlled circumstances, and devise theories with whose help we can make definite predictions. All of these are what I will call rule-seeking sciences. At the other extreme, we have sciences such as palaeontology and much of geology, which one might call historical sciences.1 With these, the aim is not so much to establish general rules, as to unravel and explain the specifics of what happened in the past. It is usual to regard the rule-seeking sciences as the most rigorous, to which the others should defer. This shows a deep misunderstanding of how science works, and, time and time again, when historical and rule-seeking sciences have come into conflict, it is historical science that has triumphed.

Rocks exposed at Grand Canyon, from Proterozoic to Permian. Click to enlarge

A few examples. The rocks clearly show (for detailed arguments, see e.g. here) that the Earth, and by implication the Sun, Read the rest of this entry

NASA launches satellite ‘TESS’ in hunt for exoplanets LAUNCH ACCOMPLISHED

Reblogged from Coel’s blog, where I commented: My own best bet for intelligent life elsewhere would be aroud a red dwarf. More of them, and far longer lifetimes. Our own Sun was nearly half way through its useful lifetime before earth had multicellular organisms. More also, at PhysOrg’s Are we alone? NASA’s new planet hunder aims to find out.

Update, launch delayed

Launch successful


With the launch of NASA’s TESS satellite due this very day, this is a popular-level account of TESS and exoplanet hunting that I wrote for The Conversation. Actually this is my version, prior to their editing.

at the stars in the night sky and wondered whether they are also orbited by planets; our generation is the first to find out the answer. We now know that nearly all stars have planets around them, and as our technology improves we keep finding more. NASA’s newest satellite, TESS (the Transiting Exoplanet Survey Satellite), scheduled for launch on Monday, will extend the hunt for small, rocky planets around nearby, bright stars.

NASA’s TESS planet hunter (artist’s impression)

We want to know how big such planets are, what orbits they are in, and how they formed and evolved. Do they have atmospheres, are they clear or cloudy, and what are they made…

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When dinosaurs roamed the Western Isles

Quite a challenge, I expect, to the local Free Presbyterians.

My friend Kim Johnson commented on the strange appearance of the footprints, Steve Drury (author of the blog of which this is just an annotated repost) referred me to Paige Depolo, senior author of the paper on which Steve’s post is based, and Paige replied as follows:

When it comes to the depositional environment, the tracks were formed in a low-energy lagoon and are generally preserved today as impressions into shaley limestone. Later, additional limestone layers were laid down at the site and in-filled the impressions. Those layers form the casts that we can still observe for some of the tracks today. In some cases at this site, the cast remains while the surrounding impression which it was originally infilling has been almost completely eroded. These rocks were deposited during the Middle Jurassic. Later, likely during the Paleogene, a sill was intruded immediately below the track bearing layer and the surrounding rocks were baked. The low-level contact metamorphism of the track-bearing layers definitely makes for some interesting looking exposures!

h/t Kim and Steve, and many thanks to Paige

Cuillin Hills, Isle of Skye, Scotland, UK Cuillin Hills, Isle of Skye, Scotland, UK (credit: Wikipedia)

The Isle of Skye off the northwest coast of Scotland  is known largely as a prime tourist destination, such as Dunvegan Castle with a real clan chief (The MacLeod of MacLeod) and its Faerie Flag; Britain’s only truly challenging mountains of the Black Cuillin; and, of course, the romantic connection with the Young Pretender, Charles Edward Stuart and his escape, in drag, from the clutches of the Duke ‘Butcher’ Cumberland, hence the Skye Boat Song. Geologists know it best for its flood basalts with classic stepped topography and the exhumed guts of a massive central volcano (the Cuillin), relics of the Palaeocene-Eocene (62 to 54 Ma) North Atlantic Large Igneous Province. The spectacular Loch Coruisk, a glacial corrie drowned by the sea, exposes the deepest part of the main magma chamber. It is also the lair of Scotland’s lesser…

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Truth imitates satire (again) at the Environmental Protection Agency

Trump shakes hands with EPA Administrator Pruitt after announcing intention to withdraw from the Paris Agreement on greenhouse gas emission

“Human activity impacts our changing climate in some manner.The ability to measure with precision the degree and extent of that impact, and what to do about it, are subject to continuing debate and dialogue… [C]lear gaps remain including our understanding of the role of human activity and what we can do about it.”

These are among the talking points distributed to EPA staffers this week.

Have you seen this kind of language before? Yes, you have indeed, from Pruitt himself almost actually a year ago.  At that time, I pointed out that Pruitt was following the script of BBC’s satire, Yes Minister. I have now tracked down the relevant episode, where UK Cabinet Minister (later Prime Minister) Jim Hacker, asks his trusted Civil Servant, Sir Humphrey Appleby, how to deal with evidence that one would rather ignore. Sir Humphrey’s advice:

Discredit the evidence that you are not publishing. This is, of course, much easier than discrediting evidence that you do publish… You say: (a) that it leaves important questions unanswered (b) that much of the evidence is inconclusive (c) that the figures are open to other interpretations (d) that certain findings are contradictory (e) that some of the main conclusions have been questioned. Points (a) to (d) are bound to be true. In fact, all of these criticisms can be made of a report without even reading it. There are, for instance, always some questions unanswered — such as the ones they haven’t asked. As regards (e), if some of the main conclusions have not been questioned, question them!

That, by the way, was about the safety of a chemical processing by-product.

Jim proving he has elbows

Hacker (L) explaining his dilemma to Sir Humphrey

You might perhaps be concerned about the degree of contact with reality with which the EPA (to quote further talking points distributed this week) “promotes science that helps inform states, municipalities and tribes on how to plan for and respond to extreme events and environmental emergencies, recognizes the challenges that communities face in adapting to a changing climate, [and] will continue to advance its climate adaptation efforts.”

But really there’s no cause to worry, because, according to Reuters, Pruitt has “reaffirmed plans for the EPA to host a public debate on climate science sometime this year that would pit climate change doubters against other climate scientists.” It’s not clear where he’ll find his climate change doubters, but I’m sure he’ll manage, and no doubt the debate will take place with the same level of intellectual content and integrity that we have seen from the Senate Environment Committee, or would expect to see in a debate on evolution organised by Vice President Pence.

So stop making a silly fuss about the Government telling scientists to misrepresent the science.

Image and quotations from EPA talking points via Washington Post, 28 March 2018. Quotation from Yes Minster via Hacker/Appleby image via Temperature image from NASA Goddard via Wikipedia; public domain

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