universetoday.com/articles/scientists-use-ancient-rains-to-map-the-possible-origin-life-on-mars Scientists Use Ancient Rains to Map the Possible Origin Life on Mars
A new global map of ancient Mars rainfall puts the highest formaldehyde deposits in the Tharsis and Elysium mountains, which received about ten times the global average. Formaldehyde is a building block for sugars and amino acids, though the study can't say how much remains on the surface today.
— via Universe Today, Matthew Williams
