The Detective Work in the Ancient Rock Record
Dr. Williams is a professor in the geology department at the University of Florida. She holds a PhD, clarifying that she is a “doctor of course… and not the MD doctor” because, thankfully, she prefers rocks to blood.
Her research centers on applying her knowledge of rocks and life to study how life is preserved in the ancient rock record on Earth. This is the foundation for her work in geobiology and astrobiology.
Her primary focus with NASA is working directly with the data coming back from the Mars Rovers Curiosity and Perseverance. Dr. Williams has applied her skill set in analyzing life preserved in ancient rocks to guide the search for evidence of life beyond Earth.
“I spent a lot of time thinking about Mars,” she reflects. The core question driving her work is existential: Mars had all the necessary building blocks for life and was very Earth-like early on, so if life took hold, is there any evidence for it now? Conversely, if life did not originate there, why not?.
Dr. Williams is driven by the extraordinary pursuit of knowing the answer to whether humanity is alone in the universe.
The True Challenge of Martian Survival
Reflecting on extreme environments on Earth, such as Glacier National Park and Yellowstone, Dr. Williams notes that these sites only offer the “tiniest taste” of what it might be like to be an actual explorer on another world.
She is quick to caution against underestimating the challenge of living on Mars. The infrastructure required is immense, and the risks are profound:
- Communication Delay: There is about a 10-minute delay in communicating with Earth.
- Isolation: There is no escape shuttle and no relief.
- Resource Dependency: Settlers would have to sustain themselves, meaning they must grow their own food and have systems in place to recycle waste and generate oxygen.
- Environment: Water is frozen and scarce, and there is no free air.
She notes that basic human actions—like running outside to take a deep breath when stressed—are impossible on Mars. This highlights the necessity of addressing the regulation of physical and mental health in confined spaces.
While she believes it is possible for people to eventually live on Mars, she stresses that it requires additional investment in technology and research. Sustained presence, with a habitat fully set up, might take into the next generation to get there. For now, she believes practicing these kinds of things on the Moon is paramount, as help is slightly more accessible there, though still quite inaccessible.
Building the Confidence Muscle
When asked about a major professional “aha moment,” Dr. Williams explained that it was less a single event and more the progression of learning to harness the little tiny bit of confidence she had.
Early in her career, anxiety was a significant hurdle. She recalled taking her full notes up to the podium during her first science talk, something that is “not really normal”. Through consistent practice, she realized she could give talks to hundreds or even thousands of people without clamping up.
The turning point was her PhD defense: “That was when I really said like, oh, I can do this“. The defense requires the student to present the final results of years of research and answer questions as an independent scientist. She learned to trust her expertise, recognizing that for her specific research, she was the expert.
This lesson was crucial when facing her biggest challenge: transitioning to her current role at the University of Florida, a large Research One institution. She had previously been very confident in her teaching abilities but less so in her research. This internal doubt was compounded by the fact that she was hired alongside her partner (a dual career hire), a situation that is “hard to get”. Rising to this new research-heavy role required her to practice and build that confidence muscle, reinforcing that she was capable.
A New Vision for Exploration and Inclusion
Dr. Williams now promotes this philosophy of self-belief, encouraging students to recognize that they deserve a seat at the table.
Her commitment to expanding accessibility is evident in her current passion project: GeoSpace. Run through the University of Florida geology department, GeoSpace is a field camp designed to meet the needs of students with diverse needs, including those who are neurodiverse or have physical disabilities that make conventional field camping difficult.
The program runs like a simulated space mission, where people online act as “mission control” and the students on the ground act as “astronauts”. This structure allows everyone to contribute, regardless of ability, whether through orbital reconnaissance (online) or sample collection (on the ground). She sees this as a vital step as geosciences evolve, stressing that “everyone belongs”.
Dr. Williams’ final advice is to stay engaged and build a network: “Ask a lot of questions” and feel free to contact researchers and faculty in fields of interest to build a support system wherever one’s career takes them.
Dr. Williams’ work in searching for remnants of ancient microbial life on Mars is like a planetary archaeologist meticulously sifting through geological ruins. By understanding the deep past of a neighbor world, she is not only seeking to answer if we are alone, but is establishing the rigorous scientific roadmap required to ensure that when humanity finally makes the leap to Mars, we have done our homework.
