01-10-2015 Ray Pestrong: Earth Art

About the Talk

Earth as Art

In his 2012 book, “The Sciences and the Arts,” Chemist Harold Cassidy draws parallels between the way artists and scientists view their worlds. He states that “there is no subject that is unfit for the probing insight of the artist, nor is there anything unsuitable for the scientist to examine.”

The premise of Dr. Pestrong’s presentation is that Art is central to the Earth, both figuratively and literally. If you cover the first and last letters of the word “Earth”, there is “art”. This is a symbolic indication of how integral Art is to the Earth and how aspects of the Arts enhance our understanding of Earth Sciences.

A 21st-century paradigm is emerging in which the integration of different fields of knowledge is seen as a necessary goal. When connections are established among otherwise disparate bits of data, more universal theorems and deeper understanding result. Our speaker’s goals, in this context, are to show how aspects of the Arts may be used to generate interest and gain insights into how the Earth works and to demonstrate how logic is not restricted solely to the scientist and that intuition is not the sole realm of the artist.

This hour-long program has been shown all across the United State to a broad spectrum of audiences. It was developed as a teaching tool for introductory geology courses, but its wide acceptance is an indication of the profound interest we have in the physical environment. Like the world it reflects, Earth Art is constantly changing as new relationships become apparent; as you’ll see, Earth Art comes in many forms.

About the Speaker

Ray Pestrong is an Emeritus Professor of Geology in the Department of Earth & Climate Sciences at San Francisco State University. For 44 years, he has taught geomorphology and engineering geology, as well as numerous general education courses in introductory geology. Dr. Pestrong has written college texts and scientific articles and has produced geologic videos. For the past 22 years, Ray has led rafting trips on the Colorado River through the Grand Canyon. What he loves most is teaching and the exciting interactions possible through that venture.

03-19-2016 Liz Nesbitt: Climate & Whales

About the Talk

Global Warming, Global Cooling, and the Evolution of Whales

Liz Nesbitt will take you on an adventure back to the end of the Cretaceous time period when dinosaurs became extinct but mammals started to flourish. Among these were sea-going mammals that evolved into the whales we know today. This will be a non-technical talk weaving together the early Cenozoic climates, whale evolution, and the fossil record for this time period that is preserved in western Washington.

After the end-Cretaceous extinctions 66 million years ago, global climates remained warm and Earth was free of ice sheets. Hothouse climates generally persisted until about 35 million years ago, when the world was plunged into icehouse conditions. Ice sheets spread across high latitudes for the first time in 200 million years. With the extinction of all large dinosaurs and marine reptiles at the end-Cretaceous, mammals rapidly evolved to fill many vacated eco-spaces. A lineage of land mammals went into the sea over this time, and the group evolved rapidly into completely aquatic animals, resulting in a diversity of whale body types and feeding strategies. During the early Cenozoic Era (55 to 25 million years ago), significant swings in climate may have been one driver of whale evolution.

About the Speaker

Dr. Nesbitt is Curator of Paleontology at the Burke Museum and Earth Sciences professor at the University of Washington. She received her doctorate from the University of California, Berkeley.

Much of her research involves the effects of changing climate on marine faunas, from large vertebrates to invertebrates and microscopic forms. She is currently working with Burke colleagues on measuring the health of Puget Sound through examination of the foraminifera in bottom sediments.

She is continually involved with the numerous exhibits at the Burke Museum, emphasizing communicating science to all ages. For example, she curated “Cruising the Fossil Freeway”, an exhibit that featured the science of Kirk Johnson (now leading the Smithsonian’s National Museum of Natural History) and the art of Ray Troll that introduced the huge variety of American fossils through interactive stations and games.

Numerous fossils of whales and other marine mammals collected on beaches of the Olympic Peninsula are housed in the Burke Museum. A new whale from this area was described in a technical paper published in 2015. Visiting paleontologists are currently studying several small whales and an ancestor of seals and sea lions, all collected from western Washington and between 30 million and 35 million years old.

10-29-2016 Susan Kieffer: Geologic Nozzles

About the Talk

Geologic Nozzles:  Mount St. Helens, Old Faithful Geyser, and the Rapids of the Colorado River

Dr. Susan Kieffer will describe what eruptions of Old Faithful Geyser and Mount St. Helens in 1980 have in common with rapids on the Colorado River in the Grand Canyon? It’s Rocket science–literally! She will discuss how some fundamental nozzle concepts from aeronautics govern flow patterns in three geologic nozzles, which can be rapid agents of change in the geologic record.

Susan Kieffer is a geologist and planetary scientist of international renown.  She is known for her research on fluid dynamics of volcanoes, geysers, and rivers and for her model of the thermodynamic properties of complex minerals.  She has also contributed to the scientific understanding of meteorite impacts.

About the Speaker

Susan Kieffer received her B.S. in physics/ mathematics from Allegheny College in 1964 and is an alumna of Cal Tech, receiving both an M.S. (1967) in geological sciences and Ph.D. (1971) in planetary sciences. She worked with the U.S. Geological Survey in Flagstaff, Arizona (1979–1990) and was affiliated with both Arizona State University (1989–1993) and Cal Tech (1982). She went on to head the Geological Sciences Department at the University of British Columbia (1993–1995). She is also a member of the National Academy of Sciences of the United States, a fellow of the American Academy of Arts and Sciences, and a 1995 MacArthur Fellow. She was awarded the Penrose Medal by the Geological Society of America in 2014 and is currently the Charles R. Walgreen, Jr. Professor Emerita at the University of Illinois.

Susan recently moved to Whidbey Island where she is retired, but still actively engaged in scientific writing, research and education. Her most recent book, entitled “The Dynamics of Disaster,” was published by W.W. Norton in 2014.  Dr. Kieffer hosts a popular blog called Geology in Motion.