Large ice caps at the poles (Polar Layered Deposits, PLD) are the largest recognized water reservoirs on Mars.

In 1976, Carl Sagan and E. E. Salpeter published a paper, "Particles, Environments, and Possible Ecologies in the Jovian Atmosphere."...

Many of us have heard of exoplanets and have been intrigued by them. When we realize the sheer diversity and uniqueness of these planets,...