Abby is a paleoclimatologist interested in understanding climate dynamics in time periods that were warmer than today. She uses ice cores from the Allan Hills, East Antarctica–home to the oldest ice ever found on Earth–to uncover aspects of the climate over the past several million years. This old ice has many peculiarities, and some of her work aims to better decipher the climate archive within this ancient ice using geochemical techniques. By using high-resolution measurements of methane, water isotopes, and dust, the fidelity of the climate archive at the Allan Hills can be better interpreted and help researchers understand the ice core record that is now being extended millions of years into the past.