New Craters Found on Mars
February 13, 2014
Orbiters can count new craters forming on Mars, refining cratering rates. One spectacular new crater has appeared since 2010 with vivid rays.
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Imagining Worlds – No Evidence Required
January 11, 2014
Science fiction is fun, but science demands evidence, not imagination.
Cosmic Lottery: How Many Habitable Planets?
November 23, 2013
News media ran with a suggestion that one in five stars has a habitable planet, but they didn't read the fine print.
Planet Habitable Zone Cannot Be Too Windy
September 19, 2013
The "habitable zone" of a planet usually concerns its distance from the star such that it can support liquid water. But what if the star fries the surface with intense stellar winds?