Summary:

- Christine Knudson, a geologist at NASA's Jet Propulsion Laboratory, uses her expertise in Earth's geology to study the geology of Mars. She has worked on several Mars exploration missions, including the Curiosity rover.

- Knudson's work involves analyzing data and images from Mars to understand the planet's geological history and identify potential landing sites for future missions. Her experience with terrestrial geology helps her interpret the data and make connections between Earth and Mars.

- Knudson's research has contributed to our understanding of Mars' past climate and the potential for habitability on the planet. Her work is crucial in preparing for future human exploration of Mars and the search for signs of past or present life.