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Culture, Society & Family Earth & Climate Fossils & Ruins Researcher news SMU In The News

Archaeology: “Undiscovery of Year” to Meltzer for refuting comet theory

Archaeology magazine, published by the Archaeological Institute of America, recognized
SMU archaeologist David Meltzer and his colleague Vance Holliday of the University of Arizona for their “undiscovery” that the important ancient Clovis culture didn’t die out from the impact of a comet.

Melter and Holliday, who published their research in the October issue of Current Anthropology, challenged the controversial theory that the impact of an ancient comet devastated the Clovis people, one of the earliest known cultures to inhabit North America.

Nothing in the archaeological record suggests an abrupt collapse of Clovis populations, said Meltzer and Holliday.

“Whether or not the proposed extraterrestrial impact occurred is a matter for empirical testing in the geological record,” the researchers wrote in their article. “In so far as concerns the archaeological record, an extraterrestrial impact is an unnecessary solution for an archaeological problem that does not exist.”

Their point-by-point refutation was awarded the “Undiscovery of the Year” by Archaeology as part of the magazine’s list of Top 10 Discoveries of 2010.

EXCERPT:

By Zach Zorich
Archaeology Magazine

It’s commonly believed that North America’s Clovis culture came to an end around 12,900 years ago, when their characteristic spear points disappeared from the archaeological record. At the same time a number of large animal species such as mammoths and saber-toothed tigers became extinct. In 2006, a team led by geologist Richard Firestone of Lawrence Berkeley National Laboratory put forth a theory that a comet struck the Earth around this time, engulfing the continent in forest fires and causing the mass extinctions as well as the demise of the Clovis culture. They deduced this from the existence of a one-millimeter-thick soil layer at several Clovis sites that contains a high concentration of particles that appear to have extraterrestrial origins.

Read the full story.

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2010 a year of advances for SMU scientific researchers at the vanguard of those helping civilization

From picking apart atomic particles at Switzerland’s CERN, to unraveling the mysterious past, to delving into the human psyche, SMU researchers are in the vanguard of those helping civilization understand more and live better.

With both public and private funding — and the assistance of their students — they are tackling such scientific and social problems as brain diseases, immigration, diabetes, evolution, volcanoes, panic disorders, childhood obesity, cancer, radiation, nuclear test monitoring, dark matter, the effects of drilling in the Barnett Shale, and the architecture of the universe.

The sun never sets on SMU research
Besides working in campus labs and within the Dallas-area community, SMU scientists conduct research throughout the world, including at CERN’s Large Hadron Collider, and in Angola, the Canary Islands, Mongolia, Kenya, Italy, China, the Congo Basin, Ethiopia, Mexico, the Northern Mariana Islands and South Korea.

“Research at SMU is exciting and expanding,” says Associate Vice President for Research and Dean of Graduate Studies James E. Quick, a professor in the Huffington Department of Earth Sciences. “Our projects cover a wide range of problems in basic and applied research, from the search for the Higgs particle at the Large Hadron Collider in CERN to the search for new approaches to treat serious diseases. The University looks forward to creating increasing opportunities for undergraduates to become involved as research expands at SMU.”

Funding from public and private sources
In 2009-10, SMU received $25.6 million in external funding for research, up from $16.5 million the previous year.

“Research is a business that cannot be grown without investment,” Quick says. “Funding that builds the research enterprise is an investment that will go on giving by enabling the University to attract more federal grants in future years.”

The funding came from public and private sources, including the National Science Foundation; the National Institutes of Health; the U.S. Departments of Agriculture, Defense, Education and Energy; the U.S. Geological Survey; Google.org; the Alfred P. Sloan Foundation; Texas’ own Hogg Foundation for Mental Health; and the Texas Instruments Foundation.

Worldwide, the news media are covering SMU research. See some of the coverage. Browse a sample of the research:

CERN and the origin of our universe
cern_atlas-thumb.jpgLed by Physics Professor Ryszard Stroynowski, SMU physics researchers belong to the global consortium of scientists investigating the origins of our universe by monitoring high-speed sub-atomic particle collisions at CERN, the world’s largest physics experiment.

Compounds to fight neurodegenerative diseases
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Synthetic organic chemist and Chemistry Professor Edward Biehl leads a team developing organic compounds for possible treatment of neurodegenerative diseases such as Parkinson’s, Huntington’s and Alzheimer’s. Preliminary investigation of one compound found it was extremely potent as a strong, nontoxic neuroprotector in mice.

Hunting dark matter
Dark%20matterthumb.jpgAssistant Professor of Physics Jodi Cooley belongs to a high-profile international team of experimental particle physicists searching for elusive dark matter — believed to constitute the bulk of the matter in the universe — at an abandoned underground mine in Minnesota, and soon at an even deeper mine in Canada.

Robotic arms for injured war vets
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Electrical Engineering Chairman and Professor Marc Christensen is director of a new $5.6 million center funded by the Department of Defense and industry. The center will develop for war veteran amputees a high-tech robotic arm with fiber-optic connectivity to the brain capable of “feeling” sensations.

Green energy from the Earth’s inner heat
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The SMU Geothermal Laboratory, under Earth Sciences Professor David Blackwell, has identified and mapped U.S. geothermal resources capable of supplying a green source of commercial power generation, including resources that were much larger than expected under coal-rich West Virginia.

Exercise can be magic drug for depression and anxiety
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Psychologist Jasper Smits, director of the Anxiety Research and Treatment Program at SMU, says exercise can help many people with depression and anxiety disorders and should be more widely prescribed by mental health care providers.

The traditional treatments of cognitive behavioral therapy and pharmacotherapy don’t reach everyone who needs them, says Smits, an associate professor of psychology.

Virtual reality “dates” to prevent victimization
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SMU psychologists Ernest Jouriles, Renee McDonald and Lorelei Simpson have partnered with SMU Guildhall in developing an interactive video gaming environment where women on virtual-reality dates can learn and practice assertiveness skills to prevent sexual victimization.

With assertive resistance training, young women have reduced how often they are sexually victimized, the psychologists say.

Controlled drug delivery agents for diabetes
brent-sumerlin.thumb.jpgAssociate Chemistry Professor Brent Sumerlin leads a team of SMU chemistry researchers — including postdoctoral, graduate and undergraduate students — who fuse the fields of polymer, organic and biochemistries to develop novel materials with composite properties. Their research includes developing nano-scale polymer particles to deliver insulin to diabetics.

Sumerlin, associate professor of chemistry, was named a 2010-2012 Alfred P. Sloan Research Fellow, which carries a $50,000 national award to support his research.

Human speed
Usain_Bolt_Berlin%2Csmall.jpgAn expert on the locomotion of humans and other terrestrial animals, Associate Professor of Applied Physiology and Biomechanics Peter Weyand has analyzed the biomechanics of world-class athletes Usain Bolt and Oscar Pistorius. His research targets the relationships between muscle function, metabolic energy expenditure, whole body mechanics and performance.

Weyand’s research also looks at why smaller people tire faster. Finding that they have to take more steps to cover the same distance or travel at the same speed, he and other scientists derived an equation that can be used to calculate the energetic cost of walking.

Pacific Ring of Fire volcano monitoring
E_crater1%20thumb.jpgAn SMU team of earth scientists led by Professor and Research Dean James Quick works with the U.S. Geological Survey to monitor volcanoes in the Pacific Ocean’s Ring of Fire near Guam on the Northern Mariana Islands. Their research will help predict and anticipate hazards to the islands, the U.S. military and commercial jets.

The two-year, $250,000 project will use infrasound — in addition to more conventional seismic monitoring — to “listen” for signs a volcano is about to blow.

Reducing anxiety and asthma
Mueret%20thumb.jpgA system of monitoring breathing to reduce CO2 intake is proving useful for reducing the pain of chronic asthma and panic disorder in separate studies by Associate Psychology Professor Thomas Ritz and Assistant Psychology Professor Alicia Meuret.

The two have developed the four-week program to teach asthmatics and those with panic disorder how to better control their condition by changing the way they breathe.

Breast Cancer community engagement
breast%20cancer%20100x80.jpgAssistant Psychology Professor Georita Friersen is working with African-American and Hispanic women in Dallas to address the quality-of-life issues they face surrounding health care, particularly during diagnosis and treatment of breast cancer.

Friersen also examines health disparities regarding prevention and treatment of chronic diseases among medically underserved women and men.

Paleoclimate in humans’ first environment
Cenozoic%20Africa%20150x120%2C%2072dpi.jpgPaleobotanist and Associate Earth Sciences Professor Bonnie Jacobs researches ancient Africa’s vegetation to better understand the environmental and ecological context in which our ancient human ancestors and other mammals evolved.

Jacobs is part of an international team of researchers who combine independent lines of evidence from various fossil and geochemical sources to reconstruct the prehistoric climate, landscape and ecosystems of Ethiopia in particular. She also identifies and prepares flora fossil discoveries for Ethiopia’s national museum.

Ice Age humans
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Anthropology Professor David Meltzer explores the western Rockies of Colorado to understand the prehistoric Folsom hunters who adapted to high-elevation environments during the Ice Age.

Meltzer, a world-recognized expert on paleoIndians and early human migration from eastern continents to North America, was inducted into the National Academy of Scientists in 2009.

Understanding evolution
Cane%20rate%2C%20Uganda%2C%2020%20mya%20400x300.jpgThe research of paleontologist Alisa WInkler focuses on the systematics, paleobiogeography and paleoecology of fossil mammals, in particular rodents and rabbits.

Her study of prehistoric rodents in East Africa and Texas, such as the portion of jaw fossil pictured, is helping shed more light on human evolution.

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Culture, Society & Family Earth & Climate Fossils & Ruins Researcher news SMU In The News

USA Today: Researchers — Clovis people didn’t disappear because of comet

“An extraterrestrial impact is an unnecessary solution for an archaeological problem that does not exist.”

USA Today has written about the research of SMU archaeologist David Meltzer that challenges the controversial theory that an ancient comet devastated the Clovis people, one of the earliest known cultures in North America.

Writing online in USA Today’s Science Fair section, journalist Elizabeth Weise notes in her article “Researchers — Clovis people didn’t disappear because of comet” that Meltzer demonstrates in a recent study that there is nothing in the archaeological record to suggest an abrupt collapse of Clovis populations.

The study was published in the October issue of Current Anthropology, Meltzer and archaeologist Vance Holliday from the University of Arizona argue that there is nothing in the archaeological record to suggest an abrupt collapse of Clovis populations.

“Whether or not the proposed extraterrestrial impact occurred is a matter for empirical testing in the geological record,” the researchers write. “In so far as concerns the archaeological record, an extraterrestrial impact is an unnecessary solution for an archaeological problem that does not exist.”

EXCERPT:

What caused the Clovis people of North America to disappear? A 2006 book suggested a massive comet strike over the Great Lakes 12,900 years ago cooled the climate, killing off mammoths and dispersing the people and their ancient culture. But a paper in the October issue of Current Anthropology disputes this theory, saying the evidence presented for it is easily explained away.

The Clovis people are known for their characteristic spear points, which vanished from the archaeological record close to 13,000 years ago. Those in favor of the comet theory say few of the Clovis sites show evidence of people living in them after the Clovis left, and that there are sediment layers empty of human habitation between the occupations.

But archaeologists Vance Holliday of the University of Arizona and David Meltzer of Southern Methodist University argue that people in those hunter gatherer cultures routinely moved around.

Read the full story.

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Culture, Society & Family Earth & Climate Fossils & Ruins

No evidence for ancient comet devastating Clovis, says SMU archaeologist’s research

“An extraterrestrial impact is an unnecessary solution for an archaeological problem that does not exist.”

New research challenges the controversial theory that the impact of an ancient comet devastated the Clovis people, one of the earliest known cultures to inhabit North America.

Writing in the October issue of Current Anthropology, archaeologists David Meltzer, Southern Methodist University, and Vance Holliday, University of Arizona, argue that there is nothing in the archaeological record to suggest an abrupt collapse of Clovis populations.

“Whether or not the proposed extraterrestrial impact occurred is a matter for empirical testing in the geological record,” the researchers write.

“In so far as concerns the archaeological record, an extraterrestrial impact is an unnecessary solution for an archaeological problem that does not exist.”

Comet theory devised to explain apparent disappearance
The comet theory first emerged in 2007 when a team of scientists announced evidence of a large extraterrestrial impact that occurred about 12,900 years ago.

The impact was said to have caused a sudden cooling of the North American climate, killing off mammoths and other megafauna.

It could also explain the apparent disappearance of the Clovis people, whose characteristic spear points vanish from the archaeological record shortly after the supposed impact. The findings are reported in the article “The 12.9-ka ET Impact Hypothesis and North
American Paleoindians
.”

As evidence for the rapid Clovis depopulation, comet theorists point out that very few Clovis archaeological sites show evidence of human occupation after the Clovis.

At the few sites that do, Clovis and post-Clovis artifacts are separated by archaeologically sterile layers of sediments, indicating a time gap between the civilizations. In fact, comet theorists argue, there seems to be a dead zone in the human archaeological record in North America beginning with the comet impact and lasting about 500 years.

Evidence at Clovis sites doesn’t support a disaster scenario
But Meltzer, a professor in the SMU Department of Anthropology, and Holliday dispute those claims. They argue that a lack of later human occupation at Clovis sites is no reason to assume a population collapse.

“Single-occupation Paleoindian sites — Clovis or post-Clovis — are the norm,” Holliday said. That’s because many Paleoindian sites are hunting kill sites, and it would be highly unlikely for kills to be made repeatedly in the exact same spot.

“Those of us who do our research in the archaeology of this time period,” Meltzer says, “would actually be surprised if these sites were occupied repeatedly.”

“So there is nothing surprising about a Clovis occupation with no other Paleoindian zone above it, and it is no reason to infer a disaster,” Holliday said.

No evidence of post-comet gap in radiocarbon dating
In addition, Holliday and Meltzer compiled radiocarbon dates of 44 archaeological sites from across the U.S. and found no evidence of a post-comet gap. “Chronological gaps appear in the sequence only if one ignores standard deviations (a statistically inappropriate procedure), and doing so creates gaps not just around (12,900 years ago), but also at many later points in time,” they write.

Sterile layers separating occupation zones at some sites are easily explained by shifting settlement patterns and local geological processes, the researchers say. The separation should not be taken as evidence of an actual time gap between Clovis and post-Clovis cultures.

Disappearance more likely a cultural choice
Holliday and Meltzer believe that the disappearance of Clovis spear points is more likely the result of a cultural choice rather than a population collapse.

“There is no compelling data to indicate that North American Paleoindians had to cope with or were affected by a catastrophe, extraterrestrial or otherwise, in the terminal Pleistocene,” they conclude. — Kevin Stacey, University of Chicago Press

SMU is a private university in Dallas where nearly 11,000 students benefit from the national opportunities and international reach of SMU’s seven degree-granting schools. For more information see www.smu.edu.

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National Academy of Sciences: “Peopling of the Americas” researcher awarded highest honor

An SMU archaeologist whose work centers on how people first came to inhabit North America has been elected a member of the National Academy of Sciences (NAS). David Meltzer, chair of SMU’s Department of Anthropology, has been elected a member of the NAS in recognition for his achievements in original scientific research.

david-meltzer

Meltzer’s work looks at the origins, antiquity, and adaptations of the first Americans. Paleoindians colonized the North American continent at the end of the Ice Age. Meltzer focuses on how these hunter-gatherers met the challenges of moving across and adapting to the vast, ecologically diverse landscape of Late Glacial North America during a time of significant climate change.

Membership in the NAS is one of the highest honors given to a scientist or engineer in the United States.

The Henderson-Morrison Professor of Prehistory in Dedman College, Meltzer will be the third SMU professor to be inducted into the NAS. All three have come from the University’s highly regarded anthropology department. Meltzer is also director of QUEST Archaeological Research Program.

Meltzer was elected April 28 along with 71 other scientists, joining more than 2,000 active NAS members. More than 180 living Academy members have won Nobel Prizes. NAS members have included Albert Einstein, Robert Oppenheimer, Thomas Edison, Orville Wright, and Alexander Graham Bell.

“It’s really an honor to be in that wonderful company,” Meltzer said shortly after being notified of his selection by phone. “I am thrilled, excited, shocked, humbled. It’s a great day.” He said he was particularly touched that the NAS members who voted him in then passed a cell phone around to offer their individual congratulations.

“David Meltzer serves as the model of a professor whose research contributes to his discipline and our understanding of civilization, and who uses that knowledge to enliven his classroom,” said SMU President R. Gerald Turner. “His election to the NAS brings much-deserved recognition to Dedman College of Humanities and Sciences and honor to SMU.”

“One of the hallmarks of top universities is the election of their faculty to the prestigious National Academy of Sciences,” said Paul Ludden, university provost and vice president for academic affairs. “SMU is so proud of its top-tier anthropology faculty member, David Meltzer, for his election today.”

Meltzer’s archaeology and history research has been supported by grants from the National Geographic Society, the National Science Foundation, The Potts and Sibley Foundation and the Smithsonian Institution. In 1996, he received a research endowment from Joseph and Ruth Cramer to establish the Quest Archaeological Research Program at SMU, which will support in perpetuity research on the earliest occupants of North America.

His research has appeared in more than 130 publications, and Meltzer has written or edited half a dozen books, including “First People in a New World: Colonizing Ice Age Americans,” recently published by The University of California Press. He received his Ph.D in anthropology/archaeology from the University of Washington in Seattle and joined the faculty at SMU in 1984.

Two emeritus faculty members in SMU’s Anthropology Department are also NAS members: Lewis Binford was elected to the NAS in 2001 and Fred Wendorf was elected in 1987. Only an Academy member may submit formal nominations to the NAS, and supporting nomination materials and candidate lists remain confidential. The evaluation process occurs throughout the year, culminating in a final ballot at the Academy’s annual meeting in April.

The National Academy of Sciences is a private, nonprofit honorific society of distinguished scholars engaged in scientific and engineering research, dedicated to the furthering science and technology and to their use for the general welfare. Established in 1863, the National Academy of Sciences has served to “investigate, examine, experiment, and report upon any subject of science or art” whenever called upon to do so by any department of the government.

HOW I BECAME AN ARCHAEOLOGIST


David Meltzer said that although he had told it many times, this story first appeared in print in “The Dallas Morning News” on Dec. 24, 2001. Photo shows him (below) on his first day in the field in June 1971.

DJM%20at%20TBird%20in%201971.jpg

One June day after school let out (I had just finished 10th grade), my mother asked me what my plans were for the summer. I told her I hoped to slouch on the couch and watch television.

“That,” she announced, “isn’t good enough.” She showed me a piece in The Washington Post (our local newspaper) about excavations beginning in a week’s time in the nearby Shenandoah Valley, at the recently-discovered Thunderbird Paleoindian site.

“Would you like to join the group?”

“Sure,” I said, figuring at that late date the university’s plans must already be set and they couldn’t possibly want to take some snotty high school kid. I went back to watching My Favorite Martian.

Never underestimate your mother.

A day later she’d made fast friends with the administrative assistant at the office, who then talked the project director — Bill Gardner, of Catholic University — into taking me on. He wasn’t so keen on my being there, either! That was over 30 years ago. I went on to excavate for four consecutive seasons at the Thunderbird and nearby Fifty site, and I’ve been doing archaeology ever since.

I’m not sure why that newspaper story caught my mother’s eye, or why she thought her son would enjoy the experience. And I’m certain she didn’t imagine it would set me on a career. But I guess that’s just a mother’s gift, now, isn’t it?

Related links:
David J. Meltzer
NAS press release: Newly elected members
Department of Anthropology
Dedman College of Humanities and Sciences