Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...

The possibility that there is liquid water on an exoplanet’s surface usually flags it as “potentially habitable,” but the reality is that too much water might prevent life from taking hold. “On Earth, ...

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights. Benjamin Roulston is Assistant Professor of Physics, ...