Are “Problems with Evolution” Evidence for Intelligent Design? Brownville Lyceum February 12, 2006 (197th Anniversary of Darwin’s Birth, & the First Annual Evolution Sunday) Chuck Austerberry, Ph.D. Biology Department Creighton University Nebraska Religious Coalition for Science Education 1840 Portrait of Charles Darwin (1809-82) by George Richmond (one year after Darwin’s marriage to Emma Wedgewood) http://images.art.com/images/-/George-Richmond/Portrait-of-Charles-Darwin-1809-82,-1840--C11725357.jpeg Darwin’s Theory of Evolution Novel heritable variations arise. Changes (mutations) in genes New combinations of genes Some variations are more likely than others to be passed on to offspring. Natural selection Sexual selection Genetic drift Accumulated variations may differ among populations divergence speciation. Figure 5.14 Why is Evolution Controversial? Origins are important in both science and religion. Creation theology developed centuries before evolutionary science, so different terms and concepts are used in each. Why is Evolution Controversial? Not compatible with a literal interpretation of Genesis 1 & 2. Confusion concerning the relationship between science and religion in general, and between evolution and creation in particular. Such Confusion Isn’t New Evolution is not the only scientific theory that has seemed to threaten belief in God. For example, Leibnitz attacked Newton's theory of gravity as subversive of religion. Such a view was temporary, as Charles Darwin noted in the second edition of On the Origin of Species, and he added: "I see no good reason why the views given in this volume should shock anyone." A Bit More About Newton Emphasized natural theology. Attributed the design of the clock-like universe to a divine Clockmaker. Why else would the planetary orbits share the same direction and plane, unlike comets? Newton also assumed that God periodically intervened to ensure stability of mechanism. Private papers show he was not a traditional Christian, but natural theology became for many the most important support for their religious faith - until Darwin. Creation in the Bible A literal reading of Genesis 1 & 2 is rejected by many Christian and Jewish theologians and religious bodies, for reasons that often have nothing to do with science. Creation in the Bible (cont.) Nonetheless, it is the right of each student to freely choose religious beliefs, including Biblical literalism. Science teaching standards do not call for personal acceptance of evolutionary theory, just an understanding of it. Other Opposition to Evolution Not all religious objections to evolution are based on Biblical literalism. Other objections include: Metaphysical status of “chance”; lack of predictability, purpose, and design. Competition and death as part of the mechanism of evolution. Continuity between humans and other species; question of the human soul. Related Controversies Religion's role in public society, especially education Local versus centralized control of public education Power struggles within the G.O.P in some states Competition between alternative worldviews Sources of Controversy Many opponents of evolution are motivated by their theism. Some proponents of evolution are motivated by their atheism. Other Sources of Controversy Misuse of evolution for pseudoscientific justification of immoral behavior (Social Darwinism) Misuse of scientific ignorance as "evidence" for a Creator (intelligent design theory) Intelligent Design (ID) Theory Unlike creationism, ID does not arise from Biblical literalism. Some ID proponents accept common descent. ID does not identify the designer. ID postulates that scientific evidence can, and does, prove that life must have been designed. Intelligent Design (ID) Theory Unlike creationism, ID does not arise from Biblical literalism, and is not necessarily equivalent to creationism or "creation science"? Creationists reject evidence that contradicts a literalistic interpretation of Genesis, but many ID proponents don't expect the scientific evidence to match the Biblical creation accounts Intelligent Design (ID) Theory Some ID proponents accept common descent. Many do not. "Sure, there's evidence that evolution takes place within a species-but the fossil record has not yielded evidence of one species becoming another . . ." (Charles Colson, Christianity Today, April 2005, Vol. 49, No. 4, Page 112) Intelligent Design (ID) Theory ID does not identify the designer. Religious motivation undeniable nonetheless. Sad that such denials are made (e.g. Dover trial) Sad that pressure exists to hide one’s religious motivation (e.g. Guillermo Gonzalez at ISU). True, extra-scientific motivations can lead to biased conduct of science (lots of examples!). Also true, however, that great discoveries have been made by scientists so motivated (also lots of examples). Copernicus, wanting to salvage the Great Circle Tradition. Francis Crick, wanting to disprove that life requires God. Example of Strong Motivation! In 1976, Jonathan Wells writes, "Father's [Moon's] words, my studies, and my prayers convinced me that I should devote my life to destroying Darwinism, just as many of my fellow Unificationists had already devoted their lives to destroying Marxism. When Father chose me to enter a PhD program in 1978, I welcomed the opportunity to prepare myself for battle." http://www.tparents.org/Library/Unification/Talks/Wells/0-Toc.htm) Intelligent Design (ID) Theory ID postulates that scientific evidence can, and does, prove that life must have been designed. Herein is the main problem with ID. Why? 1. Conclusions about whether any thing or event is designed or not designed are based on a comparison of two probabilities. 2. If the species of the designer is open, and especially if the designer need not be subject to natural laws, then it’s impossible to calculate the probability that something was designed. Thus, all “evidence” for ID is negative: supposedly intractable scientific mysteries. Problems with (ID) Theory “Evidence” for ID is based entirely on supposedly intractable problems facing Darwinian evolutionary theory (93% of Ohio science professors see no such “evidence”). ID is rejected by professional scientific organizations & peer-reviewed journals. ID is potentially valid as a metaphysical position, but not as a scientific theory. Intelligent Design (ID) Theory This limitation was recognized by David Hume and Immanuel Kant almost immediately after Newtonian natural theology began, but … Few people were aware of such philosophical argument. Thus, we still have the repeating pattern: Cast a valid open scientific question (or an invalid one!) as if it were a fatal blow to a scientific theory. Reject the science, and substitute God (“God of the gaps”) for the unknown cause. The latest anti-evolution strategy. . . Explicitly mandate intelligent design theory? No, especially not since Dover. Instead . . . Teach “abrupt appearance” (of species) and other “problems” with evolution. http://library.thinkquest.org/C003763/images/origin/millurey.gif http://library.thinkquest.org/C003763/images/origin/millurey.gif “Icons of Evolution” Question 1 Q: ORIGIN OF LIFE. Why do textbooks claim that the 1953 Miller-Urey experiment shows how life's building blocks may have formed on the early Earth -- when conditions on the early Earth were probably nothing like those used in the experiment, and the origin of life remains a mystery? A: Because evolutionary theory works with any model of the origin of life on Earth, how life originated is not a question about evolution. Textbooks discuss the 1953 studies because they were the first successful attempt to show how organic molecules might have been produced on the early Earth. When modern scientists changed the experimental conditions to reflect better knowledge of the Earth's early atmosphere, they were able to produce most of the same building blocks. Origin-of-life remains a vigorous area of research. A. Gishlick, (National Center for Science Education “Icons of Evolution” Question 2 Q: DARWIN'S TREE OF LIFE. Why don't textbooks discuss the "Cambrian explosion," in which all major animal groups appear together in the fossil record fully formed instead of branching from a common ancestor -- thus contradicting the evolutionary tree of life? A: Wells is wrong: fish, amphibians, reptiles, birds, and mammals all are post-Cambrian - aren't these "major groups"? We would recognize very few of the Cambrian organisms as "modern"; they are in fact at the roots of the tree of life, showing the earliest appearances of some key features of groups of animals - but not all features and not all groups. Researchers are linking these Cambrian groups using not only fossils but also data from developmental biology. (A. Gishlick, (National Center for Science Education) “Icons of Evolution” Question 3 Q: HOMOLOGY. Why do textbooks define homology as similarity due to common ancestry, then claim that it is evidence for common ancestry -- a circular argument masquerading as scientific evidence? A: The same anatomical structure (such as a leg or an antenna) in two species may be similar because it was inherited from a common ancestor (homology) or because of similar adaptive pressure (convergence). Homology of structures across species is not assumed, but tested by the repeated comparison of numerous features that do or do not sort into successive clusters. Homology is used to test hypotheses of degrees of relatedness. Homology is not "evidence" for common ancestry: common ancestry is inferred based on many sources of information, and reinforced by the patterns of similarity and dissimilarity of anatomical structures. (A. Gishlick, (National Center for Science Education) (A. Gishlick, (National Center for Science Education) “Icons of Evolution” Question 4 Q: VERTEBRATE EMBRYOS. Why do textbooks use drawings of similarities in vertebrate embryos as evidence for their common ancestry -- even though biologists have known for over a century that vertebrate embryos are not most similar in their early stages, and the drawings are faked? A: Twentieth-century and current embryological research confirms that early stages (if not the earliest) of vertebrate embryos are more similar than later ones; the more recently species shared a common ancestor, the more similar their embryological development. The union of evolution and developmental biology - "evo-devo" - is one of the most rapidly growing biological fields. "Faked" drawings are not relied upon: there has been plenty of research in developmental biology since Haeckel - and in fact, hardly any textbooks feature Haeckel's drawings, as claimed. Figure 5.10 (A. Gishlick, (National Center for Science Education) “Icons of Evolution” Question 5 Q: ARCHAEOPTERYX. Why do textbooks portray this fossil as the missing link between dinosaurs and modern birds -even though modern birds are probably not descended from it, and its supposed ancestors do not appear until millions of years after it? A: The notion of a "missing link" is an out-of-date misconception about how evolution works. Archaeopteryx (and other feathered fossils) shows how a branch of reptiles gradually acquired both the unique anatomy and flying adaptations found in all modern birds. It is a transitional fossil in that it shows both reptile ancestry and bird specializations. Wells's claim that "supposed ancestors" are younger than Archaeopteryx is false. These fossils are not ancestors but relatives of Archaeopteryx and, as everyone knows, your uncle can be younger than you! Figure 5.5 (1) Figure 5.5 (2) “Icons of Evolution” Question 6 Q: PEPPERED MOTHS. Why do textbooks use pictures of peppered moths camouflaged on tree trunks as evidence for natural selection -- when biologists have known since the 1980s that the moths don't normally rest on tree trunks, and all the pictures have been staged? A: These pictures are illustrations used to demonstrate a point - the advantage of protective coloration to reduce the danger of predation. The pictures are not the scientific evidence used to prove the point in the first place. Compare this illustration to the well-known re-enactments of the Battle of Gettysburg. Does the fact that these re-enactments are staged prove that the battle never happened? The peppered moth photos are the same sort of illustration, not scientific evidence for natural selection. “Icons of Evolution” Question 7 Q: DARWIN'S FINCHES. Why do textbooks claim that beak changes in Galapagos finches during a severe drought can explain the origin of species by natural selection -- even though the changes were reversed after the drought ended, and no net evolution occurred? A: Textbooks present the finch data to illustrate natural selection: that populations change their physical features in response to changes in the environment. The finch studies carefully - exquisitely - documented how the physical features of an organism can affect its success in reproduction and survival, and that such changes can take place more quickly than was realized. That new species did not arise within the duration of the study hardly challenges evolution! http://genetics.biol.ttu.edu/genetics/pictures/bithorax.gif “Icons of Evolution” Question 8 Q: MUTANT FRUIT FLIES. Why do textbooks use fruit flies with an extra pair of wings as evidence that DNA mutations can supply raw materials for evolution -- even though the extra wings have no muscles and these disabled mutants cannot survive outside the laboratory? A: In the very few textbooks that discuss four-winged fruit flies, they are used as an illustration of how genes can reprogram parts of the body to produce novel structures, thus indeed providing "raw material" for evolution. This type of mutation produces new structures that become available for further experimentation and potential new uses. Even if not every mutation leads to a new evolutionary pathway, the flies are a vivid example of one way mutation can provide variation for natural selection to work on. http://www.lclark.edu/~seavey/images%20/apetree-1.jpg “Icons of Evolution” Question 9 Q: HUMAN ORIGINS. Why are artists' drawings of ape-like humans used to justify materialistic claims that we are just animals and our existence is a mere accident -- when fossil experts cannot even agree on who our supposed ancestors were or what they looked like? A: Drawings of humans and our ancestors illustrate the general outline of human ancestry, about which there is considerable agreement, even if new discoveries continually add to the complexity of the account. The notion that such drawings are used to "justify materialistic claims" is ludicrous and not borne out by an examination of textbook treatments of human evolution. “Icons of Evolution” Question 10 Q: EVOLUTION A FACT? Why are we told that Darwin's theory of evolution is a scientific fact -- even though many of its claims are based on misrepresentations of the facts? A: What does Wells mean by "Darwin's theory of evolution"? In the last century, some of what Darwin originally proposed has been augmented by more modern scientific understanding of inheritance (genetics), development, and other processes that affect evolution. What remains unchanged is that similarities and differences among living things on Earth over time and space display a pattern that is best explained by evolutionary theory. Wells' "10 Questions" fails to demonstrate a pattern of evolutionary biologists' "misrepresenting the facts." Ohio’s “Model” Lesson In the script for a class debate on evolution: “No new species emerged" in studies of the British peppered moth. “Scientists have not observed (bacterial) cells changing into organelles, such as mitochondria or chloroplasts." http://www.ncbi.nlm.nih.gov/books/bv.fcgi?rid=mboc4.figgrp.75 Nebraska’s State Standards Nebraska’s LB 812 required all school districts to adopt measurable quality academic content standards for reading, writing, mathematics, science, social studies, and history by July 1, 2003. Nebraska L.E.A.R.N.S. The standards adopted by Nebraska school districts may be those adopted by the State Board of Education called “Nebraska L.E.A.R.N.S.” (Leading Educational Achievement through Rigorous Nebraska Standards) or more rigorous than the state standards. Local content standards must be approved by the Nebraska Department of Education. Evolution in L.E.A.R.N.S. On February 9, 1999, the Nebraska Attorney General’s Office instructed Education Commissioner Doug Christensen to revise proposed Nebraska Science Content Standards because “it appears they require 12th grade students to be taught that present forms of life, including humans, are the product of evolution.” June 1999 NE School Board Mtg. Seven TV cameras were present. A few citizens who spoke wanted alternatives to evolution taught. Three times as many citizens supported strong science standards. Board approved standards by a 5-3 vote. Lerner’s 2000 Grade of Nebraska’s Science Teaching Standards* “C” = “Satisfactory” for evolution; “B”=“Good” for overall science standards. NE one of 7 states graded “C” for evolution. 24 states graded higher, 19 states graded lower, than NE for treatment of evolution. “A decent treatment of evolution marred by the incursion of creationist notions.” *Good Science, Bad Science: Teaching Evolution in the States by Lawrence S. Lerner, for the Thomas B. Fordham Foundation, September 2000 Gross et al.’s Grade of Nebraska’s Science Standards* “Evolution is considered and some of the essential content is touched.” “However . . . we find troubling statements, inexcusably vague for grade 12 or just carelessly written.” *The State of State Science Standards by Paul R. Gross with Ursula Goodenough, Susan Haack, Lawrence S. Lerner, Martha Schwartz, and Richard Schwartz, for the Thomas B. Fordham Foundation, December 2005. The State of State Science Standards by Paul R. Gross with Ursula Goodenough, Susan Haack, Lawrence S. Lerner, Martha Schwartz, and Richard Schwartz, for the Thomas B. Fordham Foundation, December 2005. Gross et al.’s Grade of NE’s Standards “Students are asked to ‘investigate and use’ the theory of biological evolution to explain the diversity of life. But . . . how, exactly, is that investigation to proceed?” “Students are to investigate whether natural selection provides a scientific explanation of the fossil record and the molecular similarities among the diverse species of living organisms. Well, yes. But . . . again . . . ‘investigate’ is a mere honorific; ‘whether’ is insincere.” What do Nebraska’s L.E.A.R.N.S. Say? Evolution is a series of changes, some gradual and some sporadic, that account for the present form and function of objects, organisms, and natural and designed systems. The goal is for students to recognize that objects & systems change over time. By the end of twelfth grade, students will develop an understanding of the theory of biological evolution. Example Indicators in NE L.E.A.R.N.S. Understand that the concept of biological evolution is a theory which explains the consequence of the interactions of: (1) the potential for a species to increase its numbers; (2) the genetic variability of offspring due to mutation and recombination of genes; (3) a finite supply of the resources of life; and (4) the ensuing selection by the environment of those offspring better able to survive and leave offspring. Example NE Indicators (cont.) Investigate and use the theory of biological evolution to explain diversity of life. Investigate whether natural selection provides a scientific explanation of the fossil record and the molecular similarities among the diverse species of living organisms. Investigate and use biological classifications based on similarities. Could Have been Worse (Poor Kansas!) On August 11, 1999, the Kansas Board of Education deleted most references to evolution from state teaching standards (actions later reversed). In late 2005 Kansas adopted standards that refer to Darwinian evolution as inherently atheistic and lacking in evidence. Only some concepts in states’ teaching standards are on assessment tests. Kansas’ tests reportedly will not include evolution, so will it even be taught? Evolution Is a Tested Standard in Nebraska This year (2005-2006) Nebraska schools begin reporting how well their students are meeting certain of the LEARNS standards, called the STAR (Standards That Are Reported) standards. Next year (2006-2007) districts will report to the state Dept. of Education. Evolution is one of six STAR life science standards for high school. Life Science STAR Standards 12.4.1 By the end of twelfth grade, students will develop an understanding of the cell. 12.4.2 By the end of twelfth grade, students will develop an understanding of the molecular basis of heredity. Example Indicators: Investigate and describe how DNA carries the genetic code. Investigate and understand that genetic variation occurs when genetic information is transmitted during sexual reproduction. Investigate and explain how some mutations could help, harm or have no effect on individual organisms. Investigate and explain how mutations in sex cells, but not in body cells, could be passed on to offspring. Life Science STAR Standards (cont.) 12.4.3 By the end of twelfth grade, students will develop an understanding of the theory of biological evolution. Example Indicators: Understand that the concept of biological evolution is a theory which explains the consequence of the interactions of: (1) the potential for a species to increase its numbers; (2) the genetic variability of offspring due to mutation and recombination of genes; (3) a finite supply of the resources of life; and (4) the ensuing selection by the environment of those offspring better able to survive and leave offspring. Investigate and use the theory of biological evolution to explain diversity of life. Investigate whether natural selection provides a scientific explanation of the fossil record and the molecular similarities among the diverse species of living organisms. Investigate and use biological classifications based on similarities. Life Science STAR Standards (cont.) 12.4.4 By the end of twelfth grade, students will develop an understanding of the interdependence of organisms. 12.4.5 By the end of twelfth grade, students will develop an understanding of matter, energy, and organization in living systems. Life Science STAR Standards (cont.) 12.4.6 By the end of twelfth grade, students will develop an understanding of the behavior of organisms. Example Indicators: Investigate and describe how nervous systems function in multicellular animals. Investigate and describe how organisms respond to internal changes and external stimuli. Investigate and explain how the behavioral patterns of organisms have evolved through natural selection. Investigate and understand that behavioral biology relates to humans since it provides links to psychology, sociology, and anthropology. Could Have Been Better Worse On December 10, 2002 the Ohio Board of Education adopted the following benchmark for 910th graders: Describe a foundation of biological evolution as the change in gene frequency of a population over time. Explain the historical and current scientific developments, mechanisms and processes of biological evolution. Describe how scientists continue to investigate and critically analyze aspects of evolutionary theory. (The intent of this benchmark does not mandate the teaching or testing of intelligent design.) In Nebraska as in Ohio? Gov. Mike Johanns, in a letter granting final approval of our state’s revised standards (Dec. 24, 2002): “I also appreciate the State Board of Education’s position that the science standards allow local districts and teachers the academic freedom to present and discuss arguments for and against the Darwinian theory of evolution rather than mandate the ‘teaching of’ one particular evolutionary theory.” “Citizens for Objective Science” (2002 in Nebraska) "Investigate and distinguish the data and testable theories of science from religious or philosophical claims that are made in the name of science." "Investigate and understand the full range of scientific views on biological evolution that exist." "Investigate and understand why some topics, such as biological evolution, may generate controversy." Some Santorum “Amendment” (to NCLB) Recommendations are Good “Investigate and distinguish the data and testable theories of science from religious or philosophical claims that are made in the name of science.” Other Recommendations Beg Clarification “Investigate and understand the full range of scientific views on biological evolution that exist.” How full should that range be? Who decides which views are scientific? Why mandate such inclusiveness only for evolution? How about Peter Duesberg’s views on the causes of AIDS, for example? Other Recommendations Beg Clarification (cont.) "Investigate and understand why some topics, such as biological evolution, may generate controversy." What does it mean to “teach the controversy”? What sources of controversy should be discussed, and in what classes? How Should Evolution be Taught? Implying that evolution rules out a creator, or (on the other hand) that it requires a designer, would be incorrect and inappropriate. Because silence regarding metaphysical implications may be interpreted as antireligious, brief acknowledgement that many religious and philosophical perspectives exist would be accurate and appropriate. A Recent Case Study Johnson and Giberson (2002) analyzed evolution teaching in Quincy, MA (pop. 88,000, 12 elementary schools, five middle schools, two high schools). No evolution in elementary schools, but significant coverage in middle and high schools. Textbooks and teachers were generally found to present evolution in a metaphysically neutral, balanced way that respects both science and religion. Evolution is not taught dogmatically nor atheistically, but it is stressed as being of central importance. A Recent Case Study (cont.) One teacher interviewed by Johnson and Giberson (2002) said: “A theory arises as a result of huge amounts of data that almost always point to a specific solution. Creationism is not a theory, it is a belief.” This teacher presents a number of possible natural mechanisms for evolution. Although he excludes creation, he is careful not to give evolution a purposeless or meaningless tone. Compatibility is a Common View 68% (DYG, 2000) of the general American population consider evolution compatible with belief in a divine creator; 37% (Gallup, 2001) consider the evolution of humans to also be compatible with creation. 39% of American scientists believe in a personal God (Larson and Witham, 1997). 84% of Ohio college science professors (Bishop, 2002) consider evolution consistent with belief in God. One Denominational Statement 214th GENERAL ASSEMBLY OF THE PRESBYTERIAN CHURCH USA (2002) Reaffirms that God is Creator, in accordance with the witness of Scripture and the Reformed Confessions. Reaffirms that there is no contradiction between an evolutionary theory of human origins and the doctrine of God as Creator. Encourages State Boards of Education across the nation to establish standards for science education in Public Schools based on the most reliable content of scientific knowledge as determined by the scientific community. Calls upon Presbyterian scientists and science educators to assist congregations, presbyteries, communities, and the public to understand what constitutes reliable scientific knowledge. Origin of the NRCSE April 25, 2001 meeting at First Central Congregational Church in Omaha: Chuck Austerberry, M. Winston Baldwin, Anita Jeck, and John Lyden. We find evolution to be compatible with our religious faiths, and we know that many other Nebraskans do too. Why the NRCSE? (cont.) Science education needs advocates from all of Nebraska, including its religious community. Academic freedom, religious freedom, and scientific integrity are compatible. NRCSE Goals We in the NRCSE are confident that evolution can and should be taught widely and well in Nebraska’s secondary schools. Our goal is to help defend Nebraska’s teaching standards from any further weakening or confusion in regards to the scientific theory of evolution. We also desire to help raise awareness, particularly in Nebraska’s religious communities, that the search for natural explanations is essential to science but not anti-religious. Web site: http://nrcse.creighton.edu Other Groups Defending Evolution REASON Nebraska Citizens for Science Nebraska Association of Teachers of Science Nebraska Academy of Sciences Univ. of Nebraska and most colleges and universities Museums (Natural History in Lincoln, Western Heritage in Omaha) Evolution Exhibits at Museums "Explore Evolution" permanent exhibit opened Sept. 9, 2005 at the Nebraska State Museum of Natural History in Lincoln. “The Burgess Shale: Evolution's Big Bang” Dec. 17, 2005 through March 12, 2006 at the Durham Western Heritage Museum in Omaha.