In this week's "water on Mars" there's actual news of a potential liquid water reservoir on the red planet today. Well, more in it, than on it, but that adds it to the icy moons with subsurface lakes. This lake is very cold, so that water must be very salty. The astroquarks bring you up to date, touch on a new verification of general relativity, and most importantly delve into obscure superheroes and super-energetic cosmic rays. Great name for a rock band by the way. Catch it all on this episode of Walkabout the Galaxy.

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