Water on Mars? Hold up.
Anomalous radar reflections, thought to be evidence of liquid water under the ice on Mars, may instead be explained by multiple layers of even more ice.
Tholin-flavored layer cake on Titan
A new two-layer model of radar scattering seeks to explain the unique properties of various terrains on Saturn’s largest moon.
Intelligent ways to search for extraterrestrial intelligence
Many present and near-future technologies can enable refined searches for so-called technosignatures, potentially providing evidence of extraterrestrial life in the universe.
Terrestrial analogs: A slice of Mars in your own backyard
Sites on Earth that are similar to geologic features on other planets can be studied to better understand other worlds and even prepare for future exploration.
It’s alive! Mars may continue to periodically spew volcanic materials
Properties of an atypical geologic feature on Mars indicate a volcanic eruption occurred as recent as a few tens of thousands of years ago.