A recently released set of topography maps provides new evidence for an ancient northern ocean on Mars. The maps offer the strongest case yet that the planet once experienced sea-level rise consistent with an extended warm and wet climate, not the harsh, frozen landscape that exists today.
Dani Buchheister, a doctoral student in geobiology and astrobiology, is among Penn State’s 21 new National Science Foundation Graduate Research Fellowship Program recipients — six in the College of Earth and Mineral Sciences — for the 2022-23 academic year.