Geology

This is a three-part interview with Sir Robert S. J. Sparks, the Chaning Wills Professor of Geology in the Department of Earth Sciences at the University of Bristol. The interview begins with anecdotes from Sparks’ childhood and memories of undergraduate geological field trips while at Imperial College. He recalls the influences of John Ramsay and George Walker, the latter of whom became his PhD advisor. Sparks discusses Walker’s emphasis on writing and publishing, and he talks about some of his early publications. Sparks then describes his time in the U.S. at the University of Rhode Island, describing key differences between the scientific communities in the U.S. and Europe. The second session focuses on Sparks’ time at Cambridge, his teaching philosophy, and the culture within the Earth Sciences department at Cambridge. He discusses the different funding opportunities he secured from the NSF, NERC, and BP. Sparks recalls his sabbatical in Australia and recounts the factors leading to his appointment at Bristol. In the third session, Sparks reflects on his most influential papers over the years, as well as changes he has witnessed within Bristol’s earth sciences department. He discusses his involvement in the Royal Society and American Geophysical Union, as well as his time as President of both the Geological Society of London and the International Association of Volcanology and Chemistry of the Earth’s Interior (IAVCEI). The interview concludes with Sparks’ reflections on the many accolades he has received in his career and his thoughts on the role of scientists as public intellectuals. 

Interview with James Kasting, geoscientist and Distinguished Professor of Geosciences at Penn State University. Kasting describes a childhood spent in many places due to his father’s job at General Electric. For a time, he lived in Huntsville, Alabama near the NASA Marshall Space Flight Center, which piqued his interest in science and space. Kasting discusses his undergraduate studies at Harvard University, where he gravitated toward theory over experimentation while studying chemistry and physics. His developing interest in astronomy and space science led Kasting to graduate school first at UC San Diego, then University of Michigan. He recalls his postdoc at the National Center for Atmospheric Research and then his position at NASA’s Ames Research Center working with Jim Pollack. Kasting discusses his return to academia at Penn State, as well as the committees and panels he has served on over the years, such as the Terrestrial Planet Finder Science working group. Throughout the interview, Kasting talks about many areas of his research such as habitable zones, climate models, atmosphere studies, and extrasolar planets. The interview concludes with Kasting’s thoughts on extraterrestrial intelligent life and sending manned missions to Mars.

Interview with Steven Squyres, American geologist and planetary scientist. Squyres discusses his childhood in New Jersey, in a family where both parents had science education. He recalls his interest in science from a young age and his formative trips to the Colorado Rockies which inspired him to study geology. Squyres recounts his time as an undergraduate at Cornell University, where he began as a geology major but later became interested in space science. He discusses his continuation at Cornell for his graduate studies in planetary science, where he studied under Carl Sagan and worked on the Voyager imaging team. Squyres then recalls his post-doctoral position at NASA’s Ames Research Center before accepting a faculty position at Cornell. He discusses the move toward robotic exploration and touches on topics such as the Mars Observer mission and the Martian meteorite controversy. Squyres reflects on writing his book “Roving Mars” and concludes the interview with his thoughts on the broader significance of geological research on Mars. 

Baerbel and Ivo Lucchitta are both retired from the Astrogeology Science Center at the United States Geological Survey (USGS). In this interview, they begin by sharing background information on how the USGS became involved in planetary mapping and astrogeology. Ivo explains his work in the Surface Planetary Exploration division, where he was involved in training astronauts before missions. Baerbel describes her work in the Astrogeologic Studies division, where she worked on planetary mapping. They each share stories from their work on the Apollo 17 mission. Baerbel describes the different processes involved in creating maps before the time of GIS. She discusses differences between mapping the moon and mapping Mars. The Lucchittas discuss the various equipment needed for their work and how camera technology changed over the years. Baerbel also discusses her work in mapping Ganymede, as well as her current project mapping Valles Marineris, Mars. Toward the end of the interview, the Lucchittas describe how they first came to work at USGS. Ivo discusses his work as a field geologist and his research on the Grand Canyon. They conclude by discussing the importance of continued funding and research in planetary mapping. 

Interview with Ken Herkenhoff, a research geologist at the U. S. Geological Survey’s Astrogeology Science Center. Herkenhoff begins by sharing how he first became interested in Mars polar research while a student at Caltech. He recalls studying images from Mariner 9 with Larry Soderblom and explains his focus on layer deposits in polar ice. Herkenhoff reflects on the changes in technology which have influenced his work and discusses the different image qualities across Viking and Mariner missions over the years. He explains the process of creating maps and discusses the transition from hand-drawn maps to GIS maps. Herkenhoff recalls his move from the Jet Propulsion Lab to USGS and discusses his current work using images from the Curiosity rover. The interview concludes with Herkenhoff sharing the differences between mapping different regions, and he encourages young people to pursue planetary mapping. 

Interview with Dr. Diane McKnight, professor at the University of Colorado, Boulder, and currently program director for the Arctic Observing Network at the National Science Foundation. The interview begins with McKnight recounting her childhood with both parents having doctorate degrees, and she discusses the early science influences in her life. McKnight describes her decision to attend MIT for her undergraduate studies and subsequently her graduate studies in engineering, where she worked with Francois Morel. She discusses her engineering classes, campus life at MIT, and the challenges of being a woman in a male-dominated field. McKnight then recalls how her early career work at the US Geological Survey led to her work in Antarctica. She shares stories of life at McMurdo Station, meeting Al Gore, and working on the Palmer Station Long Term Ecological Research project (LTER). At the end of the interview, McKnight reflects on how this work influenced her life and what life has been like since.

Interview with Dr. Anne Grunow, Senior Research Scientist at the Byrd Polar and Climate Research Center and curator of the Center’s Polar Rock Repository at the Ohio State University. Grunow describes her childhood in Southern New Jersey where her father was a potato farmer and her mother was a schoolteacher. She recalls helping out on the farm throughout her childhood. Grunow discusses her initial enrollment at Lehigh University for her undergraduate studies and her eventual transfer to Wellesley College where she studied geology. She describes her summer internship at Chevron before beginning her graduate studies at Columbia University, studying with Ian Dalziel. Grunow talks about her time at Columbia University's Lamont-Doherty Geological Observatory and her field work in South America and Antarctica. She also reflects on being the only woman or first woman on many of her Antarctic expeditions. Grunow discusses her NATO post-doctoral fellowship at the University of Oxford as well as another post-doc that led her to Ohio State University. The interview concludes with Grunow’s involvement in the establishment of the Polar Rock Repository and her general reflections on how the field has changed over time.

Interview with Rosemary Askin, a New Zealand geologist specializing in Antarctic palynology. The interview begins with Askin recounting her childhood in New Zealand where her father worked as a civil engineer. She discusses her undergraduate studies in geology and zoology at Victoria University of Wellington, where she was introduced to palynology which she decided to pursue for graduate study. Askin discusses how she developed her focus area of Antarctic geology and describes her field work there. She talks about her many areas of research such as fossil pollen and the evolution of spores. Askin also recalls the many challenges of being a woman in geology at the time, especially a woman wanting to work in Antarctica. She discusses her academic appointments over the years at Ohio State University, Colorado School of Mines, and University of California Riverside, as well as her time as a Fulbright scholar. Toward the end of the interview, Askin describes her more recent work establishing the US Polar Rock Repository at Ohio State, and she reflects on the changes she has observed in the field of Antarctic science over the years. 

In this interview, Steven Squyres discusses: taking Chief Scientist position at Blue Origin; current interests in planetary science including the shift toward sample return missions; changes to human and robotic spaceflight; private enterprise’s emerging role; family background; decision to attend Cornell undergrad in geology; how a course on the results of the Viking mission influenced his decision to pursue robotic exploration of the solar system; involvement in underwater exploration; PhD at Cornell under Carl Sagan and Joe Veverka for the Voyager project; details of the Voyager mission; dissertation work on the geology and geophysics of Ganymede and Callisto with Gene Shoemaker; postdoc and later job with Pat Cassen and Ray Reynolds at NASA Ames; working on Mars with Michael Carr; reaction to the Challenger tragedy; decision to take position at Cornell and to study the Martian surface; 10 years of proposals to NASA, including one that led to Spirit and Opportunity; Martian habitablity; question of how life arises from non-living material; details of his approach to the Martian geological exploration project; discussion of Spirit and Opportunity’s “honorable” demises; experience as rover’s Primary Investigator (PI) and his internal management strategies; communicating information to the press; reflections on the nature of science; conclusions from Spirit and Opportunity missions; involvement with the Magellan mission; work on the Cassini imaging system; chairing NASA’s planetary decadal survey 2013-2023, recommending Europa Clipper and Perseverance; chairing the NASA Advisory Council; writing Roving Mars; stories of innovative problem-solving from the rover missions; meteorite science; reflections on his time as faculty at Cornell; transition to Blue Origin; and his long-term view of potential space occupation and habitation. Toward the end of the interview, Squyres reflects on the question of whether other lifeforms exist and on the importance of experimentation to answer that question.

In this interview, David Zierler interviews Dr. Lynnae Quick, Ocean Worlds Planetary Geophysicist at NASA’s Goddard Space Flight Center. Quick discusses the past year and the challenges associated with increasing diversity in the field, and she recounts her childhood in North Carolina. She describes her early interests in science and her undergraduate experience at North Carolina Agricultural & Technical State University and the value of attending an HBCU. Quick discusses her initial graduate work at Catholic University and a formative internship she spent working with Aki Roberge at Goddard on exoplanets and how she became interested in planetary geology and ultimately cyrovolcanism. Quick explains her decision to transfer to Johns Hopkins where there were more opportunities to study planetary science and to work with Bruce Marsh and Louise Prockter as a co-advisor. She discusses her thesis research on Europa, and she explains when it is possible to extrapolate findings on one exoplanet to others. Quick describes her postdoctoral research with Lori Glaze on cryovolcanism on Venus at Goddard and explains the relevance of this field to astrobiology. She describes her first staff scientist position at the Smithsonian National Air and Space Museum where she worked on the Europa Clipper mission and she describes the opportunity to join Goddard in a full time position, where she picked back up on the cryovolcanism research she had some as a postdoctoral researcher. Quick discusses her current work on extrasolar planets. At the end of the interview, Quick surveys the state of diversity and inclusivity in the field, and the work that remains to be done building on the efforts undertaken over the past year, and she conveys optimism that imaging geysers on Europa could yield evidence of life.