The Paleoclimatic Paradox of Mars

What time was he doing on Mars? Although this question may seem somewhat frivolous and refer to anything but geology, the truth is that behind it lies one of the keys to better understanding the landscapes we observe on the red planet. Mars is today an extremely arid and cold desert, but if we look at the highlands of the southern hemisphere, we can see how there are some ways that remind us very much of the river networks that we currently find…