World Science Scholars

Meet your Teaching Fellows

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    • Three Teaching Fellows will support your learning in the course, Life as the Next Frontier in Physics: Exploring the New Science of Astrobiology. Teaching Fellows moderate online discussions, respond to course-related questions, and facilitate interactions between students and the course Professor, and mentor students.

      Please welcome Tessa Fisher, Jake Hanson, and Yanbo Zhang. In the messages below you will find introductions from each Teaching Fellow. You are encouraged to introduce yourself to them, and to ask them any questions that may be of interest to you.

    • Jake writes:

      I am an Astrophysics PhD candidate at Arizona State University. I grew up in Wisconsin, in a small Mississippi River town named Onalaska (constantly confused with Alaska). Math was always my favorite subject in school, but it is the big, existential questions that I am most passionate about. What are life and consciousness? How did the universe form? Why is there something rather than nothing?

      These questions led me to major in Astronomy at the University of Arizona, where I learned that all astronomy is based on physics, and all physics is based on math. Thus, in a roundabout way, I was led back into mathematics and I ended up with Bachelor of Science degrees in Astronomy, Physics, and Mathematics.

      Outside of the classroom, my research career began in the burgeoning field of exoplanets. My first major project involved the implementation of a computer algorithm designed to extract the signal from faint planets next to extremely bright stars, with the ultimate goal of detecting signs of life in the atmospheres of these planets. At the heart of this problem, however, is the fact that we don’t know exactly what life should look like on other planets, and that is primarily because we don’t know what “life” really is. Thus, for my PhD research, I chose to study the difference between living and non-living systems, with the aim of identifying salient features of life that are perhaps general enough to understand what life may look like outside of earth.

      To this end, I study the emergence of collective behavior in ant colonies as they choose between potential nest sites. I use Information Theory to try and pin down where and how abstract information is instantiated physically within this system as the ability to internalize meaningful information is a key difference between living and non-living systems. In addition, I test mathematical theories of emergence and consciousness, in order to see whether these theories match our intuitive understanding of these concepts.

      I am extremely excited to be working with talented young mathematicians through the World Science Scholars program and I look forward to discussing any and all things, be it math, life, or the universe.

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    • Tessa writes:

      I’ve been fascinated with space, and with life, since an early age –something that might be the result of trips to the Smithsonian National Museum of Natural History in Washington D.C., near where I grew up. At age 12, I discovered that astrobiology was an actual field I could study, and I couldn’t imagine doing anything else with my life — after all, it combined my two great passions. (Incidentally, I also promised myself that as soon as I completed my studies, I’d apply to the U.S. astronaut corps — a promise I intend to keep ????).

      I started out at the University of Mary Washington in Fredericksburg, Virginia, before transferring to the University of Virginia after two years, as they had a very strong astronomy program. I double-majored in both astronomy and biology there, and got my first taste of academic research, analyzing the opposition surge of Saturn’s moon Iapetus. After that, I found myself at Washington State University for graduate school, working on modeling the nutrient and energy flows in subglacial ecosystems. After completing my Master’s degree there, I started on a PhD, though that fell through for a variety of reasons; fortunately, I soon discovered Sara Walker’s lab at Arizona State University (ASU), and headed south.

      I’m now currently in the third year of my PhD, studying how the atmosphere of a planet interacts with its biosphere, and how we can potentially detect those interactions using network theory. My hope is that this research will lead to better and more reliable biosignatures for exoplanets, now that we’re reaching the point where we can observe earth-like planets around other stars at sufficiently high resolution. I’m also involved in a side project studying the biogeochemistry of nearby Tempe Town Lake, and how it changes across very small time-scales, and previously contributed to another research project at ASU, modeling the availability of critical biological nutrients on planets that are entirely covered by oceans.

      Throughout my meanderings through academia, the overarching theme has been trying to understand how the complex interactions between individual lifeforms power ecosystem dynamics, and collectively affected and are effected by the surrounding environment. I believe that we cannot hope to understand the phenomenon of life in isolation — it must be considered in the context in which it emerges.

      I look forward to working with all of you on hopefully making progress on these important questions.

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    • Yanbo writes:

      My research interest is complexity, and my background is condensed matter physics. That means I like using physical concepts to study complex systems, and I am hoping to find some laws that could be universal for complex systems.

      My current research is about the Physics of Life. Life is complex, brilliant, and intelligent. What makes life be so? Can life be found in other planets? Can life be simulated? And finally, what is life? What is consciousness?

      The research above are all driven by my interest and curiosity, so I also interested in ancient music and 3d modeling. Also, strictly speaking, all of my actions tend to provide more possibilities for my future paths.

      The researches above are all driven by my interest and curiosity, so I also interested in ancient music and 3d modeling. Also, strictly speaking, all of my actions are tend to provide more possibilities for my future paths.

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