Dr. Paul Martini, a Professor of Astronomy and Physics at The Ohio State University, joins host David Staley to discuss the expanding universe, dark energy, and the role of the Dark Energy Spectroscopic Instrument (DESI) project in advancing research. Dr. Martini also talks about the importance of custom-built instruments in astronomy, the use of machine learning in data analysis, and his personal journey to being an astronomer. To hear more about his research on cosmic acceleration, you can catch Dr. Martini at the Science Sundays series on February 2nd or watch a recording of the event here.