Showing posts with label Evolution. Show all posts
Showing posts with label Evolution. Show all posts

Monday, May 28, 2012

Review - Masters of the Planet: The Search for Our Human Origins by Ian Tattersall


Short review: The hominid family is enormously complicated and difficult to figure out. It is also endlessly fascinating.

Haiku
We are the last left
A tangled hominid web
What makes us human?

Disclosure: I received this book as part of the LibraryThing Early Reviewers program. Some people think this may bias a reviewer so I am making sure to put this information up front. I don't think it biases my reviews, but I'll let others be the judge of that.

Full review: When I was young, one of the book sets my parents owned was the Nature Library series put out by the publishers of Life magazine. One of my favorite volumes in that series was Early Man, for the time a reasonably accurate presentation of the story of human evolution. That understanding is probably best exemplified by the "march of the hominids" contained on pages 41-54 of Early Man showing a fairly linear progression extending from Pliopithecus through the Australopthicenes through Homo Erectus until it reaches modern Homo Sapiens.  Although the depiction shows a couple of side branches, such as Oreopithecus and Panthropus, the overall thrust is of an orderly progression as one hominid evolves, holds sway for a period of time, and is then replaced by a successor species.

But even at that time, the story we had uncovered was not exactly linear, and the plate found on pages 74-75 of Early Man reveals this as a pair of advanced Australopithicines face off against a small band of Panthropus males - an imagined scene in which two hominid species are sharing the Earth and occasionally confronting one another. This image was fascinating to my young mind, and stuck with me ever since I saw it so many years ago. And in Masters of the Planet Ian Tattersall explains that over the last fifty years or so new discoveries have deepened our understanding of human evolution to the point where this scenario seems to have been more common than the present state in which a single hominid species stands alone. Rather than a trunk leading inexorably to us, hominid evolution seems to have been a bush, with many competing branches, in which all the others either died out (or possibly were pruned by our ancestors), leaving Homo Sapiens as the sole survivor.

In Masters of the Planet Tattersall lays out the fossil discoveries that have fueled our current understanding of the history that led to the current dominance of our species, along with the conclusions that have been drawn from those discoveries. The author walks the reader step by step through the history of anthropology, although because the oldest fossils were unearthed most recently, this tour is given in reverse order, with the most recent archaeological finds presented first and working backwards to the discoveries of the first neanderthal fossils in the nineteenth century. Through the journey through the fossil record, Tattersall explains the conclusions scientists have drawn from these artifacts and explores the various speculations engaged in when the available data is inconclusive. Most importantly, Tattersall explains the conclusions that previous evaluations of the data (which, at the time was even more incomplete than the incomplete picture we have now) led to, and how and why the general consensus has changed since that time.

The underlying theme of the book, as one might guess from the subtitle "The Search for Our Human Origins" is to explore exactly what makes us "human", and an attempt to determine at exactly what point in our evolutionary history we stopped being pre-humans or proto-humans, and actually became fully recognizable as human. Building his case on studies of our closest living relatives, the physical structures revealed by the fossils of our ancestors, and some faint traces of evidence about how those ancestors lived, Tattersall sorts through the various signature features that have been advanced in efforts to define what makes a human a human, and attempts to evaluate the points at which those traits may have arisen, and whether those traits are, in fact, the critical defining characteristics of our humanity. By the end of the book, the current picture of human origins is filled out, even though that picture, based as it is upon the fragmentary data that has made it through the eons to us, is blurry. It turns out we are not so much inevitable, as we are simply the strain of hominid that got lucky and outlasted its relatives.

What Masters of the Planet shows brilliantly is that while dimwitted creationists and "intelligent design" advocates are obsessing over irrelevancies like Piltdown man and trying to get their fairy tales into high school curricula, real scientists are ignoring their inanities and keeping busy doing actual work to uncover our true origins. And the picture they have uncovered, although more chaotic and confusing than the previous orderly progression from an ape-like ancestor to us, is also more interesting and most critically, more accurate. While there is nothing in this book that one could not have found out elsewhere, this book compiles all the material into one place so it can be seen as a whole, and the interconnections can be made readily apparent. Anyone interested in human origins will find this book both engaging and illuminating.

Ian Tattersall     Book Reviews A-Z     Home

Wednesday, October 20, 2010

Biased Opinion - Glen Beck Reaches for the Stupid, and Succeeds

All I have to say to Glenn Beck is are you kidding me? You cannot possibly be this stupid can you? You think that the fact that you've never seen a "half-monkey half-person" is all the evidence you need to discount a century and a half of science? The fact that all of the actual science that has been produced in the last 150 years years all points towards the truth of evolution - including the fossil record, the geologic record, radiometric dating, genetics, and literally dozens of other fields of inquiry - that is insufficient to demonstrate reality in the face of the fact that you've never seen a "half-monkey half-person"?

Why don't you try reading Science, Evolution, and Creationism (read review)? Or maybe Why Darwin Matters: The Case Against Intelligent Design (read review). Or go back to the beginning and read On the Origin of the Species. Perhaps you could pick up a high school biology textbook written by a practicing Catholic that is titled something difficult to parse like Biology. Maybe then you could figure out why your argument is so shockingly stupid. (In fact, the existence of a "half-monkey half-person" would actually disprove the theory evolution by natural selection, so if you find one, then your wacky creationist ideas would have more credence, not less).

Why do you even have a job? Do your bosses not realize what a complete moron you are? If so, you better keep it that way, because once they figure out just how stupid you really are, you'll probably get canned in favor of someone who is at least conversant with the science that was current as of a hundred years ago.

Biased Opinions     Home

Thursday, September 30, 2010

Review - Science, Evolution, and Creationism by The National Academy of Sciences and The Institute of Medicine


Short review: Evolution is science. Creationism is not.

Haiku
Evolution's true
Creationism is bunk
Laid out quite clearly

Full review: Although it is only seventy pages long, Science, Evolution, and Creationism packs a substantial intellectual punch in its handful of pages. Published by the National Academy of Sciences and the Institute of Medicine, the committee responsible for writing and revising this volume is replete with experts in almost every field of science (including Neil deGrasse Tyson, one of my personal favorite public advocates for science education) and the academic weight they give to the project shows through in the finished project. Intended as a basic guide to what science is, why the theory of evolution by natural selection is well-grounded and thus far uncontested science, and why creationism is decidedly not science and has no place in a science classroom, this book delivers on these promises quite handily.

The book is divided into three main chapters plus a brief conclusion. In the first, the basic elements of science are described and theory of evolution by natural selection is explained. In the second chapter, the compelling evidence in favor of the theory of evolution by natural selection is presented. In the third, the creationist "explanations", including the theory of intelligent design, are reviewed, and the fundamental flaws in them are detailed. The chapter also explains why creationism is simply not science, has no place in the science classroom, and includes a very brief overview of some of the legal decisions supporting this view. Finally, in the conclusion, the authors reiterate that science should be taught in science classes, and religious based views should not.

Science, Evolution, and Creationism is an excellent primer on the difference between actual science and creationism. Presented in a straightforward and easy to read way, the book presents the basic facts of what, inside the scientific community is a non controversy (despite what lunatic creationists would claim), and skewers the wild and inaccurate claims of those who advocate teaching superstitious nonsense to children in the form of creationist myths. For anyone who is interested in a clear, concise, and quite accessible account of what science is, why evolution is science and why creationism is not, this is the perfect place to start.

Institutes of Health     National Academy of Sciences     Book Reviews A-Z     Home

Review - Why Darwin Matters: The Case Against Intelligent Design by Michael Shermer


Short review: Intelligent design is crap. Michael Shermer explains why it is crap.

Haiku
Creationism
And Intelligent Design
Are worthless junk

Full review: It is almost unbelievable that there would be a need for this book in 2010. Given the last 150 years of study in the field of biology and other sciences, and the numerous converging lines of evidence that uniformly support the notion that Darwin's theory of evolution by natural selection is the one that best describes how the wide variety of flora and fauna came to exist on the Earth, the fact that there is a noticeable segment of the population that still adheres to the magical world view propped up by Bronze Age mythology is somewhat stunning. The idea that some alleged academics who should know better have trumped up a half-baked theory that is little more than Bronze Age mythology dressed up in fancy clothes is even more perplexing.

We live in a world in which the inexplicable is seemingly commonplace and as a result Why Darwin Matters: The Case Against Intelligent Design is, unfortunately, a book that is necessary. The book itself, however, is anything but unfortunate, and serves as a powerful antigen to the insidious lies and disinformation spread by groups such as the Discovery Institute and their willing accomplices in dishonesty such as Michael Behe, Michael Egnor, and William Dembski. In his book, Shermer first lays out the basic facts concerning Darwin's theory and the science that has followed from it and then turns to flaying the rotten flesh off of the arguments made by Intelligent design advocates to reveal the utter lack of intellectual muscle or bone supporting them. Ray Comfort and his ilk should truly fear this sort of book, because it exposes the utter foolishness of their positions in exacting detail.

The amount of time Shermer spends explaining Darwin's theory and the evidence supporting it is fairly brief, which some readers may find disappointing. But giving yet another comprehensive explanation concerning why Darwin was correct and marshaling the overwhelming evidence that has been amassed that supports this conclusion is not the point of the book. There are literally dozens, if not hundreds of books one could turn to for just such an explanation, many of which were written by much more qualified experts on Darwinian theory than Mr. Shermer. The main thrust of this book is to expose the shoddy thinking behind the creationist fairy tale that goes by the name of Intelligent Design.

Shermer systematically walks the reader through the genesis and promotion of the Intelligent Design theory. First he examines why there are people who, despite the solid scientific basis for the theory of evolution, there are some people who simply refuse to accept it as valid. This section is made particularly powerful because Shermer is connect the thinking of such people with his own thought processes when he was a younger man and an ardent conservative Christian who rejected the theory of evolution. He then turns to evaluate the Intelligent design hypothesis (one cannot call something so weak and poorly founded a "theory" using the language of science), and examines both the arguments made against the theory of evolution and the relatively small number of arguments made in favor of Intelligent Design. In a step-by-step manner, Shermer lays out the arguments made advocating the creationist/intelligent design position, and then clearly and effectively demonstrates why they are completely without foundation.

After destroying the intellectual foundations (such as they are) of Intelligent Design, Shermer turns his attention to the tactics used the its proponents, noting that the primary reason one can tell that they are not advocating science is the way they go about promoting their hypothesis. Rather than, as an actual scientific movement would, conducting research and publishing papers in scientific journals to convince other experts in the field of the correctness of their views, they spend their time engaged in political advocacy, subverting school boards, and trying to get the court system to declare their religiously based ideas to be valid fodder for classroom science. Fortunately for science education, the "cedesign proponentists" movement (a term covering both creationists and Intelligent Design advocates in the wake of revelations concerning the creationist/intelligent design textbook Of Pandas and People in the Kitzmiller v. Dover trial) has been singularly unsuccessful in the modern era in convincing the U.S. courts to accept their religious nonsense as anything other than religious nonsense.

Finally, Shermer turns his attention to the question of whether science and religion can coexist peacefully, and why Christians should not only not fight against the theory of evolution by natural selection, but should embrace it. As a humorous coda, Shermer provides a rewritten account of the Genesis creation story that accords with the somewhat loony world view promoted by creationist chuckleheads like Ken Ham and Kent Hovind, exposing their buffoonery via a sharply worded satire.

This book is, unfortunately, going to be of almost no value in convincing an ardent cdesign proponentist of the error of their ways. Many people who hold such views are simply immune to logic and reason. Conversely, those who are already firmly in the reality based camp of people who accept the truth of the science revealed by the last fifteen decades of study will also find this book of limited utility, although it would serve useful as a means of arming themselves against the silly arguments they will encounter when dealing with the anti-Darwin lobby. The book is probably most useful for people who are, in effect, fence-sitters, undecided or merely uninformed on the issue who could be swayed by rational argument and evidence. For such people, this book would serve as an excellent first step in examining the evidence and forming an educated opinion. For all but the most ardent of cdesign proponentists, this book is an excellent resource, and well worth reading.

Michael Shermer     Book Reviews A-Z     Home