NASA | El Océano Antiguo de Marte

NASA researchers have measured the proportion of heavy water on Mars, revealing that at least 20% of the planet was once covered by water. Over time, nearly 90% of this water was lost to space, with the remainder stored in the polar caps. These findings suggest Mars was wetter than previously thought, potentially improving its habitability prospects.

In which regions of Mars were the measurements of heavy water particularly focused?

What does the new measurement of water on Mars suggest about its habitability prospects?